Thermostat location and replacement?

This car has two thermostats here is a guide to help you see what you are in for when doing the job with a diagrams below that shows the locations

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

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers

Six cylinder front wheel drive automatic 59,000 miles.

Hi- I need to replace the thermostat on my car. Where is this located?

Hello,

There are two different locations for the thermostat and there are two thermostats on the 4 cylinder engine here is a guide to show you what you are in for when doing the job.

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

Here are some diagram to show you where the locations are (below)

Please let us know what happens.

Cheers

The car uses two thermostats but the top thermostat is missing. Why would the top thermostat be missing?

Hi and thanks for using 2carpros.com

I can't be sure why it was removed, but often times people are having overheating problems, so they remove thermostats. Its purpose is to allow coolant to warm faster for heating reasons on cold starts. It should be replaced. I don't know if you want them, but here are the directions.



REMOVAL

CAUTION: Perform when the engine cold.

1. Drain the engine coolant.
2. Remove the upper radiator hose, heater pipe, electric throttle control actuator inlet hose, and heater hose.
3. Remove the engine coolant outlet.
4. Remove the water control valve.

Let me know if you have other questions.



INSTALLATION
Installation is in the reverse order of removal.
^ Install the engine coolant temperature sensor.
Use Genuine RTV Silicone Sealant or equivalent.
^ Install the water control valve with the whole circumference of the flange part fitting securely inside the rubber ring.
^ Install the water control valve with the up-mark facing up and the frame center part facing upwards. The position deviation may be within the range of +10°.

Installed two new thermostats and found the bottom hose was cold even after idling for over five minutes. Is it possible I installed the lower one backwards? I noticed the top would only work one way so I think it is correct. Please advise. B.R.

Hi and thanks for using 2CarPros.com.

The thermostat can be installed incorrectly. There is a jiggle valve on the thermostat. It must be at the top when installed. If that is not properly positioned, you are going to have a hard time getting fluid through the system.

Take a look at the directions I attached. They are specific to your vehicle. The attached pictures correlate with these directions. Take a look at the last picture which shows how the jiggle valve must be positioned.

THERMOSTAT AND THERMOSTAT HOUSING

Removal and Installation

WARNING: Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator.

REMOVAL

CAUTION: Perform when the engine is cold.

1. Drain engine coolant. Refer to "Changing Engine Coolant."
2. Remove radiator lower hose from the engine coolant inlet side.
3. Remove engine coolant inlet and thermostat.

INSTALLATION
Installation is in the reverse order of removal.
^ Install the engine coolant temperature sensor. Use Genuine RTV Silicone Sealant or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS".

^ Install the thermostat with the whole circumference of the flange part fitting securely inside the rubber ring.
^ Install the thermostat with the jiggle valve facing upwards. The position deviation may be within the range of 10°.
^ If necessary, to install the heater pipe, first apply a mild detergent to the O-ring and then quickly insert the pipe into the housing.

Let me know if this helps.

Take care,
Joe

How many thermostats does the car listed above (3.5 liter) have?

Hi Pamela Harris,

This engine only has one thermostat. I attached the process for removing, testing, and installing it.

Please let me know if you have more questions. Thanks

Thanks.

Pamela Harris

KASEKENNY1 is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.

Hi Ken,Thank you,I had the thermastat replaced,I noticed that even when the car is cold the temperature gauge goes to the middle really fast even when cold is that normal?

Yes this is normal.

This sounds normal. As long as the temperature gauge does not go past the "normal" range then the quicker it gets there, the better that is. We want the engine running at what is called, operating temperature. This is where it is most efficient so again, as long as it is not going to the hot range, this is okay.

Please let us know if you have more questions. Thanks

When I start my car in the morning to let it warm up, it never warms up while sitting idle. No matter how long I let it warm up it never does until i've been driving for about 15 minutes. Could this be a problem with the thermostat?

Yes, most likely the thermostat is stuck open or missing. Does the gauge show snything after 5 minutes if engine running?

When it's sittin still the gauge does not move, but after driving for about 10 minutes it starts to move

This might be electrical instead of temperature problem. It could be the gague that is causing the problem.

My switch on the panel is stuck it does not go from cool to heat.
I had noticed it was sticking about half way but then I had to force it to the warm side and then he wouldnt go back to the cool side.
but when i turn the fan on it blows out cool air even though the thermostat is on the warm side.
not sure if because it is stuck which is causing me not to have heat or if the heating element is bad.

[quote:bd8ed097d3="shayowens"]Heater problem
2002 Nissan Altima 4 cyl Front Wheel Drive Automatic 110000 miles

My switch on the panel is stuck it does not go from cool to heat.
I had noticed it was sticking about half way but then I had to force it to the warm side and then he wouldnt go back to the cool side.
but when i turn the fan on it blows out cool air even though the thermostat is on the warm side.
not sure if because it is stuck which is causing me not to have heat or if the heating element is bad.[/quote:bd8ed097d3]


I am not technical / a mechanic, but here is a simple check, then the FIX is pretty easy and I have a SHORTCUT so you can get heat NOW for ZERO COST (less than 1 minute) below...
CHECK- the cable that is attached to temp control knob open / closes a temperature "gear" just above the accelerator... Look to make sure this black sheathed steel cable is attached to via a metal clamp and most importantly snapped onto the plastic "gear" to move forward back the round gear. Reattach or perform fix below.
I JUST replaced mine last week - below is what to do for the REAL FIX and/or a SHORTCUT to get heat NOW! The "knob" in the control panel attaches to a small steel cable in the back and the plastic clip in the back is most likely broken. (notorious design flaw).
You can easily replace the whole blower/temp control panel in about 20 -60 min, 10-15 screws, and < ~~$100 for a used control panel from a junkyard. You will need to remove center area of dash, find diagram on web, (or just pull platic piece down/off below a/c control - NO screws- PROMISE.. (the plastic piece just above the "secret compartment door" in front of gear shift area). Then undo single screw exposed on psgr side (by glove box) holding the center dash. The big center area then pulls straight out - NO more screws, Yep, just the one! Once this is, off take out radio 6-8 screws + electric clips+antenna, then the A/C heat control module 4 screws + electric clips. (it will still be connected to steel cable running down to temperature control "gear" just above accelerator. Look at the back of your middle "knob", chances are when you turn knob the cable doesn't move b/c not connected any longer. It is broke, get a new used module. Simply put in by reverse order... The steel cable is held by a metal click clamp and snapped on the "gear" below dash above accelerator... Be sure to Attach new one with knob and "gear" set for FULL heat / cold or you will get luke warm when knob is supposed to be on full heat.
** Make sure when getting new, that you get the steel cable detached from down by the accelerator area rather than trying to use your old cable and somehow clamp into the new plastic control module**
***SHORTCUT to heat NOW *** NO COST FIX! Less than 1 Minute-
You can bypass the knob and simply push the cable / gear yourself. You will need to be parked and get on floor just above the accelerator. There is a black sheathed steel cable held by a metal clamp and then snaps onto a plastic "gear". This cable pushes / pulls the gear to open close the amount of heat! simply push the gear forward / back. This is what the CONNECTED cable is supposed to do for you. Can't change while driving, but if you OPEN / CLOSE the control then you can regulate amont of heat with the amount of blower / windows etc. You will have full heat / cold!
**Be sure to use masking tape to mark the 4-5 electical wire clips you will disengage for reverse order of reassembly when removing radio and a/c controller**
good luck. let me know if you still have questions... I can add more details if you need / contact me.

I'm having the same issue..I need to set it to heat for the winter. I had my mechanic do it last year but he's unreachable now. For heat do I pull or push the cable? Could you give me step by step directions? Thank you so much, Marcie

I need to replace the thermostat on my Nissan Altima. Can you tell me where the thermostat is and give me some info on how to replace it. Thank you!

Hi dnckadlec, It is located at the end of the lower radiator hose at engine block. You need to detach the hose and then remove the housing to get at the thermostat. It is below the distributor at the air relief plug area.

how do I replace the thermostat in a 2000 NIssan Altima? Is it difficult for someone who has done little mechanical work? Where do I find instructions?

Its a piece of cake-see location below

Install thermostatic on nissan alt

Thermostat

Be careful not to spill coolant over engine compartment. Use a rag to absorb coolant.

Inspection

Check valve seating condition at normal room temperatures. It should seat tightly.

Check valve opening temperature and valve lift.
Then check if valve is closed at 5°C (9°F) below valve opening temperature.
Installation

Install thermostat with jiggle valve or air bleeder at upper side.

Apply a continuous bead of liquid gasket to mating surface of water inlet.
After installation, run engine for a few minutes, and check for leaks.

I replaced my radiator and thermostat after the old radiator cracked, but I used a Gates 180° thermostat instead of the OE 170° thermostat. Since installing it 3 days ago, I've only been able to get the thermostat to open once, when it was a sunny warmer day. Lately on cooler days (50°) the thermostat does not even open while driving uphill at high rpm (lower radiator hose stays very cool), and the engine doesn't seem to get very hot at all (the fan blows quite a bit though). Meanwhile since the thermostat isn't opening, it seems like my upper and lower radiator hoses are bulging with pressure since the coolant isn't circulating through the thermostat--can it sustain that? At the same time, I've noticed that even though the engine is warm, the heater takes awhile to put out heat, and sometimes intermittently puts out very warm heat or no heat. Could there still somehow be more air in the system causing that heater problem, or something else (vacuum?) causing it? (I already followed the instructions using the air bleed bolt, etc to remove the air from the coolant system.)

The title should have said "heater NOT consistently putting out heat!"

If both your heater hoses arent getting hot and the thermostat isnt opening i would suggest replacing the thermostat with the stock oe temp one it could be a bad new one that has happened to me.I would use a stant one i have always had good luck with that brand.As far as the hoses bulging they could be weak and need replacing.As far as your heater goes are both the heater hoses going into the heater core getting really hot with the heater on?

After a bunch more trial runs and trying to get air out of the system (the hoses are brand new BTW, and not exactly bulging I guess), I've found that sometimes both heater hoses are hot with the heater on, and sometimes only one is hot. With the front of the car jacked up, running the vehicle shows a constant stream of bubbles gurgling into the coolant reservoir, and the car seems to maintain normal temperature fine. Could air be being pulled into the heater control valve or somewhere, causing air in the system constantly? But there doesn't seem to be any coolant leaking anywhere. I don't know why the heater problem is only intermittent. Haven't seen any fogging inside the vehicle (which would indicate leaking heater core).

Also, there is no coolant in the oil, and no sign of coolant being burned in the exhaust.

(oh, and the thermostat is opening fine, it just takes a lot of revving to heat things up enough since it's a 180-degree thermostat.)

The first thing i would do is to put the stock temp thermostat back in.Then bleed the air out of the cooling system i posted how to do that for you.

Thanks for the tips, I followed the instructions with the stock thermostat, but it still had constant bubbling in the coolant reservoir. A block tester kit revealed exhaust gases in the coolant...guess it's time for a new head gasket even though there were no obvious symptoms.

Glad to hear you figured it out but sorry to hear the exhaust gases in the coolant.When you have the head off have the head pressure tested and make sure your valves are good also.Then have the head surfaced also straight edge your block and look for cracks.Let me kwow how it comes out.

I had a shop do the job and they had the head pressure tested and machined and said everything else was good besides the slightly failing head gasket. Seems to be running fine without the air now!

Glad to hear you got the car running good thats what we like to hear.

1995 Nissan Altima 155000 miles

engine will not heat up in cold weather.thermostat replaced twice.fluid level has been chkd.new radiator installed for an un related problem

Did you check the heater core to see if it is clogged?