thermostat?

remove and installation
1. Note the radio security code and station presets.

2. Disconnect the negative battery cable.

3. Drain the engine coolant into a sealable container.

4. Remove the fasteners from the thermostat housing and remove the thermostat.


To install:

5. Install the thermostat using a new seal. If the thermostat has a small bleed hole, make sure the bleed hole is on the top.

6. Apply an anti-seize compound to the threads of the fasteners.

7. Reassemble in the reverse order of disassembly.

8. Set the heater to the full hot position.

9. Locate the coolant bleed valve near the thermostat housing and open the valve 1 / 2 a turn.

10. Top off the cooling system and overflow reservoir with a 50/50 mixture of a recommended antifreeze and water solution. and bleed the system to remove any air pockets as necessary. Simultaneously squeeze the upper and lower radiator hoses to help push any captured air pockets out of the system.

11. Inspect all coolant hoses and fittings to make sure they are properly installed and if previously opened, close the bleed valve.

12. Connect the negative battery cable.

13. Install the radiator cap loosely and start the engine. Allow the engine to run until the cooling fan has cycled two times, then turn the engine off and top off the cooling system as necessary.

14. Install the radiator cap and inspect for leaks.

15. Enter the radio security code.

Here is a guide to help you step by step with instructions in the diagrams below to show you how on your car.

https://www.2carpros.com/articles/replace-thermostat

Check out the diagrams (Below). Please let us know what happens.

Hi, I did my thermstat today, cool.ant flush, and radiator cap. The thermostat was a 170 in there and running fine now im at a 180 thermostat and runs fine. This guy next door said i should i got a 195. Will my car not run good? I drove it around and its fine and the temperature gauge is good too. I live in a hot climate too. Whats the difference of a 180 and 195? TY

engine runs hotter. helps emissions levels but more heat is harder on engine/cooling system parts. i would stick with what you got.

WELL ADVANCEAUTOPARTS SAID 180 IS OE.

that's what i meant. you got 180 is fine.

Hi.. do you recquire a thermostat in a 97 civic even in a tropical country..? Where is it located? Removing it, do you need a sealant or a gasket maker?

Yes, they are neded to keep the engine at the optimum temp for power and emissions. It is located where the lower rad hose connects to the engine. When you purchase the new one, ask for the gasket as well to prevent any leaks

Thanks !!!!!

My pleasure

I was replacing the thermostat on my car. As I was tightening one of the screws. It broke and the other half stayed in the hole of the part where you set the thermostat. I was wondering if the housing can come off so I don't have to drill out the broken screw while its attached to the motor!

Not clear on what the problem is. If the head is broken off and the other bolt is removed, of course you can lift the housing off. If part of the remaining bolt is sticking up you may be able to turn it with a vice-grip pliers. You can also slide a nut over it and weld it to the bolt, then use a socket and ratchet to unscrew it. I can describe how to do that even if the bolt is broken off flush. You'll need an acetylene torch, a wire feed welder, and at least one nut, maybe more.

If the remaining part of the bolt has already turned a little indicating it's not rusted tight you may be able to drill in the center with a left-hand drill bit and walk it out with that.

I have a car that is intermittently overheating. I have replaced the thermostat, the bottom hose and the electric fan so far. It still has issues. So here is the meat of what has happened. I eventually took the thermostat completely out just replacing the seal to find out if that was the issue. No it still overheats. The radiator is a dual core performance radiator and I know that is ok. I checked flow on it and there is no issue there. The system bleeds into the overflow quite a bit but that is not unexpected as I do not trust the cap. Now I know that it cant be the pump because then it would overheat constantly. Besides that the pump is so simple I couldn't imagine it going out. I also thought that maybe the belt was slipping but that would make a great deal of noise which it is not doing. Are there any other issues that I may be missing? The engine seems to run fine otherwise.

first, put the thermostat back in. it must be there or you will fry the motor.

you most likely have blown a head gasket from the overheating. have a leak down test done to confirm

Roy

That has to be explained. Letting the coolant flow without restriction will fry the motor? That makes absolutely no sense. While it really makes it more difficult to warm up the engine in cold weather I cannot see how that will either fry the engine or blow the head gasket.

you blew the head gasket from overheating.

as far as the thermostat, it is there for a reason. it must be there to control flow throughout the motor. you have uncontrolled flow with it out and boils the water in the block. its all about the engineering. if it did not matter, then it would not be there

Roy

After starting my car on a very cold morning, it started idling erratically while warming up. I started driving and noticed that I wasn't getting any heat at all from the blower. After about 5 miles the car started to overheat. I immediately pulled over and let the engine cool down. I've checked the oil for coolant mixture but it still looks fine. I can still drive the car for short distances (still idles erratically) without overheating. If I change the thermostat, will this fix the problem or is there something else I need to worry about?

You need to test the thermostat first.

With the vehicle at operating temperature both rad hoses should be around the same temperature. If the lower one is significantly cooler than the top hose that will indicate that the thermostat is stuck closed when it should be open.

F41-guy,

Thanks for your response. The temps were significantly different. I changed the thermostat today and topped off the coolant level. After driving for a while the temp gauge fluctuates between the 2 and 3 o'clock position. Also, I still don't get any heat from the blower. Just cool to warm air in all positions and levels. Any thoughts?

It sounds like you did not bleed the coolant system properly.

With the engine cool, remove the rad cap and top up the coolant. Leave the cap off and start the vehicle with the heat on full. Let the vehicle idle until the thermostat opens up (so until both hoses are the same temperature) and you get heat coming out of the vents. Once this happens, usually all the coolant is bled out of the system.

Keep in mind as the vehicle is running the coolant level will get lower and lower since the air pockets are escaping, keep on refilling the radiator to the top.

I've got a 94 Honda Civic CX with a 1.5 engine. Car was running on the cool side so I replaced the thermostat. Now it is running hot and the hose from the thermostat housing is cool. Is the what could be causing this? I the thermostat stuck closed? It is installed properly.

Recheck the thermostat and make sure the coolant is circulating-

The issue has been resolved. When the old thermostat is removed this causes the antifreeze to drain out of the heater core, causing an air bubble. When the system is resealed the thermostat must get hot and open to force the air bubble out. By opening the air bleeder valve, located at the point were the top radiator hose comes out of the head, (looks like a bolt head with a hole on top - 10mm) you will bleed off the trapped air. Just run the engine, get it hot and open that valve. When the air is gone the temp gauge will drop to a normal operating temp -(just under half way on the temp gauge).

just changed the thermostat and filled the coolant and still have cold air blowing out what else could it be

Hi lowellk,

Did you bleed the system of air with the heater turned to maximum?

Did you check if the heater valve opens fully when heater is turned on? Misadjustment of the cable can result in valve not opening correctly.

Are both heater hoses hot when heater is turned on? With the engine hot and the heater on, feel both heater hoses they should be both hot, if not the heater control may be faulty or you may have a blocked heater core, start here,

I had a new alternator installed on my car. A day or two later, my car wouldn't start. I thought that it was just too cold (being in Michigan) for the car to start. After about 20 minutes of trying to jump it with the wife's car, it finally started, though it was kind of rough and smelled a bit. On the way home from work the next day, I noticed an abnormal amount of white exhaust. About 2 minutes later, the tempurature went all the way red (although there was NO heat coming from the vent) and it was sputtering. I had to drive home with no radiator cap and stopping every minute to add water. My brother in law said with that much smoke, it had to be the head gasket. But a few guys from work said that it was the thermostat. Which is it and where is the thermostat located??

Your brother In-law was right. You have a bad head gasket or a cracked head. The white smoke is steam, water is being dumped into your cyclinders and that is why you get white smoke. A bad thermostat will only stop the flow of your cooling system.

i have been looking at all kinds of autoshops and all of them have the wrong water outlet, im thinking the engine was switched and am wondering how to find out what part number i need
.

Are you shore you have the right outlet . Are you looking for the thermostat housing. The housing fore the t satat is on the left side of the engine pass side . Should have some ground wires on it.

What is the engine code on your vehicle?

Where is the thermostat located on an 1987 Honda Civic?

Thermostat is located inside the housing connected to the lower radiator hose.

After disconnecting the lower radiator hose at engine side, remove the 2 holding bolts to the housing and the ground wire bolt, you should be able to remove the housing to get at the thermostat.

I was going to replace the thermostat on my Honda but when I took the thermostat housing off there was no thermostat but the thermostat that I bought won't fit It is almost like I am missing something on the engine for where the thermostat is suppose to go. Can you tell me where the thermostat is suppose to go on a 1.5 engine.
Thanks Nate

find the upper radiator hose then follow it to the engine, where it connects is the housing, remove the housing and that is where the thermostat go, if the thermostat is too small it may need a rubber o-ring that goes aroudn it, check with your autopart store and make sure you have the proper thermostat.

[quote:c0067bedab="N8-65"]Heater problem
1985 Honda Civic 4 cyl Four Wheel Drive Manual 120137 miles
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I was going to replace the thermostat on my Honda but when I took the thermostat housing off there was no thermostat but the thermostat that I bought won't fit It is almost like I am missing something on the engine for where the thermostat is suppose to go. Can you tell me where the thermostat is suppose to go on a 1.5 engine.
Thanks Nate[/quote:c0067bedab]

Trace the lower radiator hose to the back of the engine above the transmission you'll see a housing with a bleeder on top. that is where the thermostat is.

1997 Honda Civic Ferio 1500cc CVT mieleage:85000 Km.The normal temperature of my car is in the middle of the gauge. When I use the air-condition system the temperature rises a bit higher (bout 3/4 of the gauge).My overflow tank starts to overflow.The radiator is full of dirt.Also when my car is cold and idle,the water in the radiator is foaming at the top...my mechanic told me that it may be mixing water with oil from the gascet.Is that right?Also my car's heater don't warm up quicly...If i drain the water and clean up the whole system,and replacing the thermostat will be ok??

you should drain it and clean it and check your thermostat and head gasket. sounds like the head gaskets are bad causing the oil to mix with the coolant :$ replace them and refil and bleed the air out of the coolant system and you should be good to go.