Intake camshaft position actuator circuit/open (bank 1). what's this mean and what causing spark plugs to be soaked in gas?
Aug 17, 2019 at 11:32 AM
Code po010 and po300 says permanent random misfire
2011 CHEVROLET MALIBU
CORY2427
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Welcome to 2CarPros.
The camshaft actuator open means there is no connection between the computer and the actuator. This actuator is controlled by the ECM. The ECM can change intake timing hydraulically via this actuator.
If you look at the last attached pic, it indicates how the system works and the components involved.
Now, if you feel it needs replaced, it is a big job. The timing chain will need removed. Here are the directions for removal and replacement. The attached pictures correlate with the directions.
________________________________________
2011 Chevrolet Malibu L4-2.4L
Camshaft Position Intake Actuator Replacement
CAMSHAFT POSITION INTAKE ACTUATOR REPLACEMENT
Special Tools
* EN-45059 - Angle Meter
* EN-48749 - Timing Chain Retention Tool Kit
* EN-48953 - Camshaft Actuator Locking Tool
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
Removal Procedure
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
2. Remove the spark plugs. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
pic 1
3. Rotate the crankshaft clockwise and install the EN-48953 - retention
tool (1).
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).
4. Install the camshaft actuator retainer bolts and tighten to 10 Nm (89 lb in) .
5. Loosen, but DO NOT remove the intake camshaft actuator bolt.
6. Remove the EN-48953 - locking tool (1).
7. Clean the timing chain and gears with solvent.
Note: Ensure the timing chain and the camshaft position actuators are marked for proper assembly.
8. Mark the intake and exhaust camshaft actuators and the respective locations on the timing chain.
pic 2
9. Remove the upper timing chain guide bolts and guide.
pic 3
10. Remove the timing chain tensioner.
pic 4
Note:
* The intake camshaft actuator should not rotate during the removal or installation.
* Ensure the tips of the tool are fully engaged into the timing chain. The retention tool rod can be used on the back side of the chain to ensure the teeth from the retention tool are engaged.
11. Install the EN-48749 - retention tool (1) to the intake side of the timing chain.
pic 5
12. Install the EN-48749 - retention tool (1) to the exhaust side of the timing chain.
pic 6
13. Remove and discard the intake camshaft actuator bolt (1).
14. Rotate the exhaust camshaft clockwise slightly to take the tension off of the timing chain on the intake actuator.
15. Remove the intake camshaft actuator (3) from the camshaft while also removing the actuator from the timing chain.
Installation Procedure
pic 7
Note: Ensure that the alignment mark made previously on the intake camshaft actuator is still aligned properly with the mark on the timing chain.
1. Install the timing chain onto the intake camshaft actuator.
2. Align the intake camshaft actuator alignment mark made previously with the timing chain mark and install the actuator onto the camshaft rotating the exhaust camshaft clockwise, if required.
3. Install a NEW intake camshaft actuator bolt (1) until snug.
pic 8
4. Remove the timing chain retention tool (1) from the intake side of the timing chain.
pic 9
Note: Ensure that the alignment mark previously on the intake camshaft actuator is still aligned properly with the timing chain. If the mark made previously on the intake camshaft actuator is not aligned properly, refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement (See: Timing Chain > Removal and Replacement > Camshaft Timing Chain, Sprocket, and Tensioner Replacement).
5. Remove the timing chain retention tool (1) from the exhaust side of the timing chain.
Note: Failure to reset the tensioner will allow the tensioner to over extend. limiting the timing chain life.
6. Reset and install the timing chain tensioner. Refer to Timing Chain Tensioner Replacement (See: Timing Chain Tensioner > Removal and Replacement > Timing Chain Tensioner Replacement).
pic 10
7. Install the EN-48953 - retention tool (1).
8. Install the camshaft actuator retainer bolts and tighten to 10 Nm (89 lb in).
9. Tighten the NEW camshaft actuator bolt to 30 Nm (22 lb ft) plus an additional 100 degrees using the EN-45059 - meter.
Note: You must have the EN-48953 - retention tool installed to perform this procedure.
10. To release the tensioner apply a counterclockwise rotational torque to the crankshaft balancer bolt of 45 Nm (33 lb ft).
11. Remove the EN-48953 - retention tool (1).
pic 11
12. Install the upper timing chain guide and bolts and tighten to 10 Nm (89 lb in).
13. Install the spark plugs. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
14. Install the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
Let me know.
Joe
The camshaft actuator open means there is no connection between the computer and the actuator. This actuator is controlled by the ECM. The ECM can change intake timing hydraulically via this actuator.
If you look at the last attached pic, it indicates how the system works and the components involved.
Now, if you feel it needs replaced, it is a big job. The timing chain will need removed. Here are the directions for removal and replacement. The attached pictures correlate with the directions.
________________________________________
2011 Chevrolet Malibu L4-2.4L
Camshaft Position Intake Actuator Replacement
CAMSHAFT POSITION INTAKE ACTUATOR REPLACEMENT
Special Tools
* EN-45059 - Angle Meter
* EN-48749 - Timing Chain Retention Tool Kit
* EN-48953 - Camshaft Actuator Locking Tool
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
Removal Procedure
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
2. Remove the spark plugs. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
pic 1
3. Rotate the crankshaft clockwise and install the EN-48953 - retention
tool (1).
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).
4. Install the camshaft actuator retainer bolts and tighten to 10 Nm (89 lb in) .
5. Loosen, but DO NOT remove the intake camshaft actuator bolt.
6. Remove the EN-48953 - locking tool (1).
7. Clean the timing chain and gears with solvent.
Note: Ensure the timing chain and the camshaft position actuators are marked for proper assembly.
8. Mark the intake and exhaust camshaft actuators and the respective locations on the timing chain.
pic 2
9. Remove the upper timing chain guide bolts and guide.
pic 3
10. Remove the timing chain tensioner.
pic 4
Note:
* The intake camshaft actuator should not rotate during the removal or installation.
* Ensure the tips of the tool are fully engaged into the timing chain. The retention tool rod can be used on the back side of the chain to ensure the teeth from the retention tool are engaged.
11. Install the EN-48749 - retention tool (1) to the intake side of the timing chain.
pic 5
12. Install the EN-48749 - retention tool (1) to the exhaust side of the timing chain.
pic 6
13. Remove and discard the intake camshaft actuator bolt (1).
14. Rotate the exhaust camshaft clockwise slightly to take the tension off of the timing chain on the intake actuator.
15. Remove the intake camshaft actuator (3) from the camshaft while also removing the actuator from the timing chain.
Installation Procedure
pic 7
Note: Ensure that the alignment mark made previously on the intake camshaft actuator is still aligned properly with the mark on the timing chain.
1. Install the timing chain onto the intake camshaft actuator.
2. Align the intake camshaft actuator alignment mark made previously with the timing chain mark and install the actuator onto the camshaft rotating the exhaust camshaft clockwise, if required.
3. Install a NEW intake camshaft actuator bolt (1) until snug.
pic 8
4. Remove the timing chain retention tool (1) from the intake side of the timing chain.
pic 9
Note: Ensure that the alignment mark previously on the intake camshaft actuator is still aligned properly with the timing chain. If the mark made previously on the intake camshaft actuator is not aligned properly, refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement (See: Timing Chain > Removal and Replacement > Camshaft Timing Chain, Sprocket, and Tensioner Replacement).
5. Remove the timing chain retention tool (1) from the exhaust side of the timing chain.
Note: Failure to reset the tensioner will allow the tensioner to over extend. limiting the timing chain life.
6. Reset and install the timing chain tensioner. Refer to Timing Chain Tensioner Replacement (See: Timing Chain Tensioner > Removal and Replacement > Timing Chain Tensioner Replacement).
pic 10
7. Install the EN-48953 - retention tool (1).
8. Install the camshaft actuator retainer bolts and tighten to 10 Nm (89 lb in).
9. Tighten the NEW camshaft actuator bolt to 30 Nm (22 lb ft) plus an additional 100 degrees using the EN-45059 - meter.
Note: You must have the EN-48953 - retention tool installed to perform this procedure.
10. To release the tensioner apply a counterclockwise rotational torque to the crankshaft balancer bolt of 45 Nm (33 lb ft).
11. Remove the EN-48953 - retention tool (1).
pic 11
12. Install the upper timing chain guide and bolts and tighten to 10 Nm (89 lb in).
13. Install the spark plugs. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
14. Install the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
Let me know.
Joe
Images (Click to enlarge)
Aug 17, 2019 at 6:42 PM
No theses are the actuators I was talking about.
Aug 17, 2019 at 7:12 PM
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Done changed them that code about camshaft is gone, but still have the cylinder 4 misfire. says it twice once saying permanent and other saying pending after erasing codes and disconnect batter done changed all coil and plugs.
Image (Click to enlarge)
Aug 17, 2019 at 7:14 PM
Welcome back:
Do you have a P0304? If not, what codes do you have? Also, are all of the plugs wet? Have you checked fuel pressure? If fuel pressure is good, you have spark to cylinder 4, and the timing is correct, then you need to confirm compression.
Let me know.
Do you have a P0304? If not, what codes do you have? Also, are all of the plugs wet? Have you checked fuel pressure? If fuel pressure is good, you have spark to cylinder 4, and the timing is correct, then you need to confirm compression.
Let me know.
Aug 17, 2019 at 9:01 PM
Yes, I have the 304 code and before I changed plugs the old ones were soaked in gas.
Aug 17, 2019 at 9:05 PM
Have you checked fuel pressure? Have you checked the number 4 for spark even though it has a new coil? Also, have you pulled the injector to see if it is stuck open?
Other than that, compression in that cylinder can cause a misfire. Also, a faulty crankshaft position sensor can cause a misfire.
Let me know.
Joe
Other than that, compression in that cylinder can cause a misfire. Also, a faulty crankshaft position sensor can cause a misfire.
Let me know.
Joe
Aug 17, 2019 at 9:08 PM
No not checked fuel pressure. wouldn’t think that be the issue because it’s definitely getting gas and no not checked spark on it or fuel injector. how would you check if injector is open or coil has spark? I’d think it would considering got new coils.
Aug 17, 2019 at 9:16 PM
Welcome back:
The reason I mentioned fuel pressure is because the regulator may not be working and allowing too much pressure to reach the injectors. You got a tough one. I'm trying to think of things that could be an issue.
Here are links that explain how to check an injector, spark, and so on. And yes, I agree that the new coil should be fine. However, it could be bad or it may not be getting power.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
https://www.2carpros.com/articles/how-to-test-an-ignition-system
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
https://www.2carpros.com/articles/how-to-test-engine-compression
Here are the manufacturer's specs for fuel pressure:
2011 Chevrolet Malibu V6-3.6L
Pressure, Vacuum and Temperature
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Pump Fuel Pressure Specifications Pressure, Vacuum and Temperature
PRESSURE, VACUUM AND TEMPERATURE
Ignition ON, engine OFF .................... 386-427 kPa (56-62 psi)
Relieve the fuel pressure to 69 kPa (10 psi). Verify that the fuel pressure does not decrease more than 14 kPa (2 psi) in 5 minutes
Let me know what you find.
Joe
The reason I mentioned fuel pressure is because the regulator may not be working and allowing too much pressure to reach the injectors. You got a tough one. I'm trying to think of things that could be an issue.
Here are links that explain how to check an injector, spark, and so on. And yes, I agree that the new coil should be fine. However, it could be bad or it may not be getting power.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
https://www.2carpros.com/articles/how-to-test-an-ignition-system
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
https://www.2carpros.com/articles/how-to-test-engine-compression
Here are the manufacturer's specs for fuel pressure:
2011 Chevrolet Malibu V6-3.6L
Pressure, Vacuum and Temperature
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Pump Fuel Pressure Specifications Pressure, Vacuum and Temperature
PRESSURE, VACUUM AND TEMPERATURE
Ignition ON, engine OFF .................... 386-427 kPa (56-62 psi)
Relieve the fuel pressure to 69 kPa (10 psi). Verify that the fuel pressure does not decrease more than 14 kPa (2 psi) in 5 minutes
Let me know what you find.
Joe
Aug 17, 2019 at 9:28 PM
Mine does not have a fuel pressure regulator it’s internal on this year model.
Aug 17, 2019 at 9:37 PM
Welcome back:
That is correct. It doesn't have a traditional regulator. However, on this vehicle, the fuel pressure regulator is a part of the fuel tank module. Fuel demands still need to be regulated. The fuel pressure regulator, a part of the fuel tank module, maintains the correct fuel pressure to the fuel injection system.
I realize it isn't the traditional type, but I feel it is worth checking pressure.
Joe
That is correct. It doesn't have a traditional regulator. However, on this vehicle, the fuel pressure regulator is a part of the fuel tank module. Fuel demands still need to be regulated. The fuel pressure regulator, a part of the fuel tank module, maintains the correct fuel pressure to the fuel injection system.
I realize it isn't the traditional type, but I feel it is worth checking pressure.
Joe
Aug 17, 2019 at 9:49 PM
How could you even check it if it’s part of the pump? you’d have to buy pump just to fix regulator if it was bad. should I just go ahead and replace all fuel injectors?
Aug 17, 2019 at 9:55 PM
Welcome back:
You first need to confirm that fuel pressure is within the manufacturer's specs. If it is, then the regulator is fine. If it is too high, then the module will need replaced.
As far as the regulators, I feel we need to do one thing at a time. I wouldn't want you to replace parts that are good.
You first need to confirm that fuel pressure is within the manufacturer's specs. If it is, then the regulator is fine. If it is too high, then the module will need replaced.
As far as the regulators, I feel we need to do one thing at a time. I wouldn't want you to replace parts that are good.
Aug 17, 2019 at 10:12 PM
What chances it be that then fuel injectors got a full tank? don’t want to have to drop that heavy thing.
Aug 17, 2019 at 10:29 PM
Before I would pull the tank, I would check the injector and compression.
Aug 18, 2019 at 6:48 PM
I’d have to check them all because all plugs were soaked in gas.
Aug 18, 2019 at 8:16 PM
I thought it ran but had a number 4 misfire. I would start by checking pressure. Or, here is a link that explains how to test injectors. See if there is an injector pulse. You should see the test light flash on and off. If it stays on all the time, then we have a different issue related to the power control module.
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
As you I'm sure are aware, it would be very unlikely that all injectors went bad at the same time.
Let me know what you find.
Joe
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
As you I'm sure are aware, it would be very unlikely that all injectors went bad at the same time.
Let me know what you find.
Joe
Aug 18, 2019 at 9:14 PM
Yes, cylinder 4 is misfire and it does run but rough. I changed plugs and all are soaked in gas.
Aug 18, 2019 at 9:18 PM
Welcome back:
If they are all soaked, I'm surprised it's running. Honestly, I would start with fuel pressure. Something is allowing too much fuel to get to the plugs.
However, another thought just hit me. Do you have a live data scanner? I wonder if the engine coolant temperature sensor is bad. If it tells the computer it is -40°F, the computer will dump fuel to run the engine in extreme temps. It's only a theory at this time. If you do have a live data scanner, check the ECT signal to determine if it is sending an accurate signal to the computer.
Let me know.
Joe
If they are all soaked, I'm surprised it's running. Honestly, I would start with fuel pressure. Something is allowing too much fuel to get to the plugs.
However, another thought just hit me. Do you have a live data scanner? I wonder if the engine coolant temperature sensor is bad. If it tells the computer it is -40°F, the computer will dump fuel to run the engine in extreme temps. It's only a theory at this time. If you do have a live data scanner, check the ECT signal to determine if it is sending an accurate signal to the computer.
Let me know.
Joe
Aug 18, 2019 at 9:25 PM
Don’t have live scanner. could it be crankshaft sensor?
Aug 18, 2019 at 9:32 PM
It could. Take a look through this link. I hate to throw parts at things and be wrong. I'm sure you don't want to do that. Can you get your hands on a live data scanner?
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
Aug 18, 2019 at 9:35 PM
Not unless I take it to the dealer.
Aug 18, 2019 at 9:41 PM
Okay. Then I suggest starting with the fuel pressure.
Aug 18, 2019 at 9:57 PM
So drop tank then change pump out?
Aug 18, 2019 at 10:02 PM
No, the pump doesn't need removed. On the fuel rail (where the injectors are), there is a service port. That is where you connect a fuel pressure gauge to check pressure. Here is a link that shows and explains how it is done:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
The link discusses a regulator being disconnected. That can't be done on your vehicle. We just need to know how much pressure is at the fuel rail. Here are the manufacturer's specs:
2011 Chevrolet Malibu L4-2.4L
Pressure, Vacuum and Temperature
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Pump Fuel Pressure Specifications Pressure, Vacuum and Temperature
Ignition ON, engine OFF .................... 345-414 kPa (50-60 psi)
If you need a fuel pressure gauge, most parts stores will lend/rent one to you.
Let me know what you find.
Joe
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
The link discusses a regulator being disconnected. That can't be done on your vehicle. We just need to know how much pressure is at the fuel rail. Here are the manufacturer's specs:
2011 Chevrolet Malibu L4-2.4L
Pressure, Vacuum and Temperature
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Pump Fuel Pressure Specifications Pressure, Vacuum and Temperature
Ignition ON, engine OFF .................... 345-414 kPa (50-60 psi)
If you need a fuel pressure gauge, most parts stores will lend/rent one to you.
Let me know what you find.
Joe
Aug 18, 2019 at 10:10 PM
Would a dealer hooking scan tool on it tell about misfire and all the fuel on plugs?
Aug 18, 2019 at 10:54 PM
So ran compression test on it cylinder 1 through 3 has 150 or greater on psi and 4 cylinder had 62psi.
Aug 19, 2019 at 12:41 PM
What’s the labor hours call for pulling head off and putting back on?
Aug 19, 2019 at 1:41 PM
Welcome back:
That is surely the cause of the cyl 4 misfire. That isn't enough compression to fire the cylinder.
I attached a pic below. It is parts and labor for a head gasket replacement. The labor listed is for removing and replacing the head.
Here are the directions for replacing a head gasket. Keep in mind, it could be a valve issue or something different.
2011 Chevrolet Malibu L4-2.4L
15. Cylinder Head Removal
Vehicle Engine, Cooling and Exhaust Engine Service and Repair Overhaul Unit Repair 2011 Malibu 2.4L 15. Cylinder Head Removal
15. CYLINDER HEAD REMOVAL
Cylinder Head Removal (LAP, LAT, LE5, LE8, LE9)
Special Tools
EN-38188 - Cylinder Head Broken Bolt Extractor Kit
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
pic 2
1. Remove the cylinder head to the block bolts in sequence.
Discard the bolts.
pic 3
Caution: In order to prevent damage to the valves and injectors during cylinder head removal, set the cylinder head on blocks.
2. Remove the cylinder head (1).
3. Remove the cylinder head gasket (2).
4. Clean all of the gasket surfaces.
5. Use the following procedures when cleaning the cylinder head and cylinder block surfaces:
* Use a razor blade gasket scraper to clean the cylinder head and cylinder block gasket surfaces. Do not scratch or gouge any surface.
Note: Do not use any other method or technique to clean these gasket surfaces.
* Use a new razor blade for each cylinder head and cylinder block.
Note: Be careful not to gouge or scratch the gasket surfaces. Do not gouge or scrape the combustion chamber surfaces. The feel of the gasket surface is important, not the appearance. There will be indentations from the gasket left in the cylinder head after all of the gasket material is removed. These small indentations will be filled in by the new gasket.
* Hold the razor blade as parallel to the gasket surface as possible.
Note: Do not use a tap to clean the cylinder head bolt holes.
6. Clean the old sealer/lube and dirt from the bolt holes.
7. Clean the bolt holes with a nylon bristle brush.
Warning
Wear safety glasses to avoid injury when using compressed air or any cleaning solvent. Bodily injury may occur if fumes are inhaled or if skin is exposed to chemicals.
8. When cleaning the cylinder head bolt holes use a suitable commercial spray liquid solvent and compressed air from an extended-tip blow gun to reach the bottom of the holes.
9. Remove any broken long cylinder head bolts using the EN-38188 - extractor kit.
___________________________________
2011 Chevrolet Malibu L4-2.4L
51. Cylinder Head Installation
Vehicle Engine, Cooling and Exhaust Engine Service and Repair Overhaul Unit Repair 2011 Malibu 2.4L 51. Cylinder Head Installation
51. CYLINDER HEAD INSTALLATION
Cylinder Head Installation (LAP, LAT, LE5, LE8, LE9)
Special Tools
EN 45059 - Angle Meter
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
pic 4
Note: Do not use any sealing material.
1. Install the cylinder head gasket (2) to the block.
2. Install the cylinder head (1).
pic 5
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).
Note: Always use new cylinder head bolts.
3. Install and tighten the cylinder head bolts in sequence.
* Tighten the bolts to 30 Nm (22 lb ft).
* Using the EN 45059 - meter , tighten the bolts an additional 155 degrees in sequence.
pic 6
4. Install the front cylinder head bolts (1) and tighten to 35 Nm (26 lb ft).
________________________________________________
The most difficult part of the job is related to the timing chain removal and replacement. The chain needs removed from the cams for head removal. Here are the extensive directions. All remaining pics correlate with the directions.
________________________________________________
2011 Chevrolet Malibu L4-2.4L
Camshaft Timing Chain, Sprocket, and Tensioner Replacement
Vehicle Engine, Cooling and Exhaust Engine Timing Components Timing Chain Service and Repair Removal and Replacement Camshaft Timing Chain, Sprocket, and Tensioner Replacement
CAMSHAFT TIMING CHAIN, SPROCKET, AND TENSIONER REPLACEMENT
Camshaft Timing Chain, Sprocket, and Tensioner Replacement
Special Tools
* EN-45027 - Tensioner Tool
* EN-45059 - Angle Meter
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
Removal Procedure
imageOpen In New TabZoom/Print
1. Remove the number 1 cylinder spark plug. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
2. Rotate the crankshaft in the engine rotational direction clockwise, until the number 1 piston is at top dead center (TDC) on the exhaust stroke.
3. Remove the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
4. Remove the engine front cover. Refer to Engine Front Cover Replacement (See: Timing Cover > Removal and Replacement).
5. Remove the upper timing chain guide bolts and guide.
pic 7
Note: The timing chain tensioner must be removed to unload chain tension before the timing chain is removed. If it is not, the timing chain will become cocked and it will be difficult to remove.
6. Remove the timing chain tensioner.
pic 8
7. Install a 24 mm wrench on the hex on the exhaust camshaft in order to hold the camshaft.
8. Remove and discard the exhaust camshaft actuator bolt (2).
9. Remove the exhaust camshaft actuator (1, 3) from the camshaft and timing chain.
pic 9
10. Remove the timing chain tensioner guide bolt and guide.
pic 10
11. Remove the fixed timing chain guide access plug.
pic 11
12. Remove the fixed timing chain guide bolts and guide.
pic 12
13. Install a 24 mm wrench on the hex on the intake camshaft in order to hold the camshaft.
14. Remove and discard the intake camshaft actuator bolt (2).
15. Remove the intake camshaft actuator (3), and the timing chain through the top of the cylinder head.
pic 13
16. Remove the crankshaft sprocket (2) and friction washers (1), if equipped.
pic 14
17. If replacing the balance shaft timing chain and sprocket, perform the following steps, if not proceed to step 10 in the installation procedure.
18. Remove the balance shaft drive chain tensioner bolts and tensioner.
pic 15
19. Remove the adjustable balance shaft chain guide bolt and guide.
pic 16
20. Remove the small balance shaft drive chain guide bolts and guide.
pic 17
21. Remove the upper balance shaft drive chain guide bolts and guide.
pic 18
Note: It may ease removal of the balance shaft drive chain to get all the slack in the chain between the crankshaft and water pump sprockets.
22. Remove the balance shaft drive chain (7).
23. Remove the balance shaft drive sprocket.
Installation Procedure
pic 19
1. If replacing the balance shaft timing chain, perform the following steps, if not proceed to step 10.
2. Install the balance shaft drive sprocket.
Note: If the balance shafts are not properly timed to the engine, the engine may vibrate or make noise.
3. Install the balance shaft drive chain (7) with the colored link lined up with the marks on the balance shaft sprockets and the balance shaft drive sprocket. There are 3 colored links on the chain. Two are chrome and one is copper. Use the following steps in order to line up the links with the sprockets.
1. Place the copper link (5) so that it lines up with the timing mark (2) on the intake side balance shaft sprocket.
2. Working clockwise around the chain, place the chrome link (4) in line with the timing mark (3) on the balance shaft drive sprocket (approximately 6 o'clock position on the sprocket).
3. Place the chain (7) on the water pump drive sprocket. The alignment is not critical.
4. Align the last chrome link (6) with the timing mark (1) on the exhaust side balance shaft drive sprocket.
pic 20
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).
4. Install the upper balance shaft drive chain guide and bolts and tighten to 15 Nm (11 lb ft).
pic 21
5. Install the small balance shaft drive chain guide and bolts and tighten to 15 Nm (11 lb ft).
pic 22
6. Install the adjustable balance shaft chain guide and bolt and tighten to 10 Nm (89 lb in).
pic 23
7. Reset the timing chain tensioner by performing the following steps:
1. Rotate the tensioner plunger 90 degrees in its bore and compress the plunger.
2. Rotate the tensioner back to the original 12 o'clock position and insert a paper clip through the hole in the plunger body and into the hose in the tensioner plunger.
8. Install the balance shaft drive chain tensioner and bolts and tighten to 10 Nm (89 lb in).
9. Remove the paper clip from the balance shaft drive chain tensioner.
pic 24
10. On 2.2L engines, ensure the intake camshaft notch is in the 10 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at TDC, crankshaft key at 12 o'clock.
pic 25
11. On 2.4L engines, ensure the intake camshaft notch is in the 5 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at TDC, crankshaft key at 12 o'clock.
pic 26
12. Install the friction washer, if applicable.
13. Install the timing chain drive sprocket to the crankshaft with the timing mark in the 5 o'clock position and the front of the sprocket facing.
pic 27
Note:
* There are 3 colored links on the timing chain. Two links are of matching color, and 1 link is of a unique color. Use the following procedure to line up the links with the actuators. Orient the chain so that the colored links are visible.
* Always use new actuator bolts.
14. Assemble the intake camshaft actuator into the timing chain with the timing mark lined up with the uniquely colored link (1).
pic 28
15. Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).
16. Install the intake camshaft actuator onto the intake camshaft while aligning the dowel pin into the camshaft slot.
17. Hand tighten the new intake camshaft actuator bolt.
pic 29
18. Route the timing chain around the crankshaft sprocket and line up the first matching colored link with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.
19. Install the friction washer, if applicable.
pic 30
20. Rotate the crankshaft clockwise to remove all chain slack. Do not rotate the intake camshaft.
21. Install the adjustable timing chain guide down through the opening in the cylinder head and install the adjustable timing chain bolt. Tighten the adjustable timing chain guide bolt to 10 Nm (89 lb in).
pic 31
Note: Always install NEW actuator bolts.
22. Install the exhaust camshaft actuator into the timing chain with the timing mark lined up with the second matching colored link.
pic 32
23. Install the exhaust camshaft actuator onto the exhaust camshaft, aligning the dowel pin into the camshaft slot.
24. Use 24 mm open ended wrench, rotate the exhaust camshaft approximately 45 degrees until the dowel pin in the camshaft actuator goes into the camshaft slot.
pic 33
25. When the actuator seats on the cam, tighten the new exhaust camshaft actuator bolt hand tight.
pic 34
26. Verify that all of the colored links and the appropriate timing marks are still aligned. If they are not aligned, repeat the portion of the procedure necessary to align the timing marks.
pic 35
27. Install the fixed timing chain guide and bolts. Tighten the fixed timing chain guide bolts to 12 Nm (106 lb in).
pic 36
28. Install the upper timing chain guide and bolts. Tighten the upper timing chain guide bolts to 10 Nm (89 lb in).
pic 37
29. Reset the timing chain tensioner by performing the following steps:
1. Remove the snap ring.
2. Remove the piston assembly from the body of the timing chain tensioner.
3. Install the EN-45027-2 - tool (2) into a vise.
4. Install the notch end of the piston assembly into the EN-45027-2 - tool (2).
5. Using the EN-45027-1 - tool (1), turn the ratchet cylinder into the piston.
6. Reinstall the piston assembly into the body of the tensioner.
7. Install the snap ring.
pic 38
30. Inspect the timing chain tensioner seal for damage. If damaged, replace the seal.
31. Inspect to ensure all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.
Note: Ensure the timing chain tensioner seal is centered throughout the torque procedure to eliminate the possibility of an oil leak.
32. Install the timing chain tensioner assembly. Tighten the timing chain tensioner to 75 Nm (55 lb ft).
33. The timing chain tensioner is released by compressing it 2 mm (0.079 in), which will release the locking mechanism in the ratchet. To release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam drive chest to rest on the cam chain. Then give a sharp jolt diagonally downwards to release the tensioner.
pic 39
34. Using a 24 mm wrench, engage the hex on the intake camshaft, and using a torque wrench, tighten the camshaft actuator bolt. Tighten the intake camshaft position actuator bolt to 30 Nm (22 lb ft) plus 100 degrees using the EN-45059 - meter.
35. Using a 24 mm wrench, engage the hex on the exhaust camshaft, and using a torque wrench, tighten the camshaft actuator bolt. Tighten the exhaust camshaft position actuator bolt to 30 Nm (22 lb ft) plus 100 degrees using the EN-45059 - meter.
pic 40
36. Install the timing chain oiling nozzle. Tighten the timing chain oiling nozzle bolt to 10 Nm (89 lb in).
pic 41
37. Apply sealant compound to the thread of the timing chain guide bolt access hole plug. Refer to Adhesives, Fluids, Lubricants, and Sealers (See: Engine > Mechanical > Adhesives, Fluids, Lubricants, and Sealers) for the recommended sealant.
38. Install the timing chain guide bolt access hole plug. Tighten the access hole plug to 90 Nm (66 lb ft).
39. Install the engine front cover. Refer to Engine Front Cover Replacement (See: Timing Cover > Removal and Replacement).
40. Install the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
41. Install the number 1 cylinder spark plug. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
_________________________
I know that is a lot of work, but figured I would add it in case you wanted to do it yourself.
Let me know if you have questions and how things turn out.
Take care,
Joe
That is surely the cause of the cyl 4 misfire. That isn't enough compression to fire the cylinder.
I attached a pic below. It is parts and labor for a head gasket replacement. The labor listed is for removing and replacing the head.
Here are the directions for replacing a head gasket. Keep in mind, it could be a valve issue or something different.
2011 Chevrolet Malibu L4-2.4L
15. Cylinder Head Removal
Vehicle Engine, Cooling and Exhaust Engine Service and Repair Overhaul Unit Repair 2011 Malibu 2.4L 15. Cylinder Head Removal
15. CYLINDER HEAD REMOVAL
Cylinder Head Removal (LAP, LAT, LE5, LE8, LE9)
Special Tools
EN-38188 - Cylinder Head Broken Bolt Extractor Kit
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
pic 2
1. Remove the cylinder head to the block bolts in sequence.
Discard the bolts.
pic 3
Caution: In order to prevent damage to the valves and injectors during cylinder head removal, set the cylinder head on blocks.
2. Remove the cylinder head (1).
3. Remove the cylinder head gasket (2).
4. Clean all of the gasket surfaces.
5. Use the following procedures when cleaning the cylinder head and cylinder block surfaces:
* Use a razor blade gasket scraper to clean the cylinder head and cylinder block gasket surfaces. Do not scratch or gouge any surface.
Note: Do not use any other method or technique to clean these gasket surfaces.
* Use a new razor blade for each cylinder head and cylinder block.
Note: Be careful not to gouge or scratch the gasket surfaces. Do not gouge or scrape the combustion chamber surfaces. The feel of the gasket surface is important, not the appearance. There will be indentations from the gasket left in the cylinder head after all of the gasket material is removed. These small indentations will be filled in by the new gasket.
* Hold the razor blade as parallel to the gasket surface as possible.
Note: Do not use a tap to clean the cylinder head bolt holes.
6. Clean the old sealer/lube and dirt from the bolt holes.
7. Clean the bolt holes with a nylon bristle brush.
Warning
Wear safety glasses to avoid injury when using compressed air or any cleaning solvent. Bodily injury may occur if fumes are inhaled or if skin is exposed to chemicals.
8. When cleaning the cylinder head bolt holes use a suitable commercial spray liquid solvent and compressed air from an extended-tip blow gun to reach the bottom of the holes.
9. Remove any broken long cylinder head bolts using the EN-38188 - extractor kit.
___________________________________
2011 Chevrolet Malibu L4-2.4L
51. Cylinder Head Installation
Vehicle Engine, Cooling and Exhaust Engine Service and Repair Overhaul Unit Repair 2011 Malibu 2.4L 51. Cylinder Head Installation
51. CYLINDER HEAD INSTALLATION
Cylinder Head Installation (LAP, LAT, LE5, LE8, LE9)
Special Tools
EN 45059 - Angle Meter
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
pic 4
Note: Do not use any sealing material.
1. Install the cylinder head gasket (2) to the block.
2. Install the cylinder head (1).
pic 5
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).
Note: Always use new cylinder head bolts.
3. Install and tighten the cylinder head bolts in sequence.
* Tighten the bolts to 30 Nm (22 lb ft).
* Using the EN 45059 - meter , tighten the bolts an additional 155 degrees in sequence.
pic 6
4. Install the front cylinder head bolts (1) and tighten to 35 Nm (26 lb ft).
________________________________________________
The most difficult part of the job is related to the timing chain removal and replacement. The chain needs removed from the cams for head removal. Here are the extensive directions. All remaining pics correlate with the directions.
________________________________________________
2011 Chevrolet Malibu L4-2.4L
Camshaft Timing Chain, Sprocket, and Tensioner Replacement
Vehicle Engine, Cooling and Exhaust Engine Timing Components Timing Chain Service and Repair Removal and Replacement Camshaft Timing Chain, Sprocket, and Tensioner Replacement
CAMSHAFT TIMING CHAIN, SPROCKET, AND TENSIONER REPLACEMENT
Camshaft Timing Chain, Sprocket, and Tensioner Replacement
Special Tools
* EN-45027 - Tensioner Tool
* EN-45059 - Angle Meter
For equivalent regional tools, refer to Special Tools (See: Engine > Electrical / Mechanical Repair > Special Tools).
Removal Procedure
imageOpen In New TabZoom/Print
1. Remove the number 1 cylinder spark plug. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
2. Rotate the crankshaft in the engine rotational direction clockwise, until the number 1 piston is at top dead center (TDC) on the exhaust stroke.
3. Remove the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
4. Remove the engine front cover. Refer to Engine Front Cover Replacement (See: Timing Cover > Removal and Replacement).
5. Remove the upper timing chain guide bolts and guide.
pic 7
Note: The timing chain tensioner must be removed to unload chain tension before the timing chain is removed. If it is not, the timing chain will become cocked and it will be difficult to remove.
6. Remove the timing chain tensioner.
pic 8
7. Install a 24 mm wrench on the hex on the exhaust camshaft in order to hold the camshaft.
8. Remove and discard the exhaust camshaft actuator bolt (2).
9. Remove the exhaust camshaft actuator (1, 3) from the camshaft and timing chain.
pic 9
10. Remove the timing chain tensioner guide bolt and guide.
pic 10
11. Remove the fixed timing chain guide access plug.
pic 11
12. Remove the fixed timing chain guide bolts and guide.
pic 12
13. Install a 24 mm wrench on the hex on the intake camshaft in order to hold the camshaft.
14. Remove and discard the intake camshaft actuator bolt (2).
15. Remove the intake camshaft actuator (3), and the timing chain through the top of the cylinder head.
pic 13
16. Remove the crankshaft sprocket (2) and friction washers (1), if equipped.
pic 14
17. If replacing the balance shaft timing chain and sprocket, perform the following steps, if not proceed to step 10 in the installation procedure.
18. Remove the balance shaft drive chain tensioner bolts and tensioner.
pic 15
19. Remove the adjustable balance shaft chain guide bolt and guide.
pic 16
20. Remove the small balance shaft drive chain guide bolts and guide.
pic 17
21. Remove the upper balance shaft drive chain guide bolts and guide.
pic 18
Note: It may ease removal of the balance shaft drive chain to get all the slack in the chain between the crankshaft and water pump sprockets.
22. Remove the balance shaft drive chain (7).
23. Remove the balance shaft drive sprocket.
Installation Procedure
pic 19
1. If replacing the balance shaft timing chain, perform the following steps, if not proceed to step 10.
2. Install the balance shaft drive sprocket.
Note: If the balance shafts are not properly timed to the engine, the engine may vibrate or make noise.
3. Install the balance shaft drive chain (7) with the colored link lined up with the marks on the balance shaft sprockets and the balance shaft drive sprocket. There are 3 colored links on the chain. Two are chrome and one is copper. Use the following steps in order to line up the links with the sprockets.
1. Place the copper link (5) so that it lines up with the timing mark (2) on the intake side balance shaft sprocket.
2. Working clockwise around the chain, place the chrome link (4) in line with the timing mark (3) on the balance shaft drive sprocket (approximately 6 o'clock position on the sprocket).
3. Place the chain (7) on the water pump drive sprocket. The alignment is not critical.
4. Align the last chrome link (6) with the timing mark (1) on the exhaust side balance shaft drive sprocket.
pic 20
Caution: Refer to Fastener Caution (See: Vehicle > Vehicle Damage Warnings > Fastener Caution).
4. Install the upper balance shaft drive chain guide and bolts and tighten to 15 Nm (11 lb ft).
pic 21
5. Install the small balance shaft drive chain guide and bolts and tighten to 15 Nm (11 lb ft).
pic 22
6. Install the adjustable balance shaft chain guide and bolt and tighten to 10 Nm (89 lb in).
pic 23
7. Reset the timing chain tensioner by performing the following steps:
1. Rotate the tensioner plunger 90 degrees in its bore and compress the plunger.
2. Rotate the tensioner back to the original 12 o'clock position and insert a paper clip through the hole in the plunger body and into the hose in the tensioner plunger.
8. Install the balance shaft drive chain tensioner and bolts and tighten to 10 Nm (89 lb in).
9. Remove the paper clip from the balance shaft drive chain tensioner.
pic 24
10. On 2.2L engines, ensure the intake camshaft notch is in the 10 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at TDC, crankshaft key at 12 o'clock.
pic 25
11. On 2.4L engines, ensure the intake camshaft notch is in the 5 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at TDC, crankshaft key at 12 o'clock.
pic 26
12. Install the friction washer, if applicable.
13. Install the timing chain drive sprocket to the crankshaft with the timing mark in the 5 o'clock position and the front of the sprocket facing.
pic 27
Note:
* There are 3 colored links on the timing chain. Two links are of matching color, and 1 link is of a unique color. Use the following procedure to line up the links with the actuators. Orient the chain so that the colored links are visible.
* Always use new actuator bolts.
14. Assemble the intake camshaft actuator into the timing chain with the timing mark lined up with the uniquely colored link (1).
pic 28
15. Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).
16. Install the intake camshaft actuator onto the intake camshaft while aligning the dowel pin into the camshaft slot.
17. Hand tighten the new intake camshaft actuator bolt.
pic 29
18. Route the timing chain around the crankshaft sprocket and line up the first matching colored link with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.
19. Install the friction washer, if applicable.
pic 30
20. Rotate the crankshaft clockwise to remove all chain slack. Do not rotate the intake camshaft.
21. Install the adjustable timing chain guide down through the opening in the cylinder head and install the adjustable timing chain bolt. Tighten the adjustable timing chain guide bolt to 10 Nm (89 lb in).
pic 31
Note: Always install NEW actuator bolts.
22. Install the exhaust camshaft actuator into the timing chain with the timing mark lined up with the second matching colored link.
pic 32
23. Install the exhaust camshaft actuator onto the exhaust camshaft, aligning the dowel pin into the camshaft slot.
24. Use 24 mm open ended wrench, rotate the exhaust camshaft approximately 45 degrees until the dowel pin in the camshaft actuator goes into the camshaft slot.
pic 33
25. When the actuator seats on the cam, tighten the new exhaust camshaft actuator bolt hand tight.
pic 34
26. Verify that all of the colored links and the appropriate timing marks are still aligned. If they are not aligned, repeat the portion of the procedure necessary to align the timing marks.
pic 35
27. Install the fixed timing chain guide and bolts. Tighten the fixed timing chain guide bolts to 12 Nm (106 lb in).
pic 36
28. Install the upper timing chain guide and bolts. Tighten the upper timing chain guide bolts to 10 Nm (89 lb in).
pic 37
29. Reset the timing chain tensioner by performing the following steps:
1. Remove the snap ring.
2. Remove the piston assembly from the body of the timing chain tensioner.
3. Install the EN-45027-2 - tool (2) into a vise.
4. Install the notch end of the piston assembly into the EN-45027-2 - tool (2).
5. Using the EN-45027-1 - tool (1), turn the ratchet cylinder into the piston.
6. Reinstall the piston assembly into the body of the tensioner.
7. Install the snap ring.
pic 38
30. Inspect the timing chain tensioner seal for damage. If damaged, replace the seal.
31. Inspect to ensure all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.
Note: Ensure the timing chain tensioner seal is centered throughout the torque procedure to eliminate the possibility of an oil leak.
32. Install the timing chain tensioner assembly. Tighten the timing chain tensioner to 75 Nm (55 lb ft).
33. The timing chain tensioner is released by compressing it 2 mm (0.079 in), which will release the locking mechanism in the ratchet. To release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam drive chest to rest on the cam chain. Then give a sharp jolt diagonally downwards to release the tensioner.
pic 39
34. Using a 24 mm wrench, engage the hex on the intake camshaft, and using a torque wrench, tighten the camshaft actuator bolt. Tighten the intake camshaft position actuator bolt to 30 Nm (22 lb ft) plus 100 degrees using the EN-45059 - meter.
35. Using a 24 mm wrench, engage the hex on the exhaust camshaft, and using a torque wrench, tighten the camshaft actuator bolt. Tighten the exhaust camshaft position actuator bolt to 30 Nm (22 lb ft) plus 100 degrees using the EN-45059 - meter.
pic 40
36. Install the timing chain oiling nozzle. Tighten the timing chain oiling nozzle bolt to 10 Nm (89 lb in).
pic 41
37. Apply sealant compound to the thread of the timing chain guide bolt access hole plug. Refer to Adhesives, Fluids, Lubricants, and Sealers (See: Engine > Mechanical > Adhesives, Fluids, Lubricants, and Sealers) for the recommended sealant.
38. Install the timing chain guide bolt access hole plug. Tighten the access hole plug to 90 Nm (66 lb ft).
39. Install the engine front cover. Refer to Engine Front Cover Replacement (See: Timing Cover > Removal and Replacement).
40. Install the camshaft cover. Refer to Camshaft Cover Replacement (See: Valve Cover > Removal and Replacement > Camshaft Cover Replacement).
41. Install the number 1 cylinder spark plug. Refer to Spark Plug Replacement (See: Spark Plug > Removal and Replacement).
_________________________
I know that is a lot of work, but figured I would add it in case you wanted to do it yourself.
Let me know if you have questions and how things turn out.
Take care,
Joe
Images (Click to enlarge)
Aug 19, 2019 at 8:02 PM