Question about 1995 Cadillac DeVille

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How to replace thermostat

My car is showing a message of Idle engine and hot coolant after only 10 minutes of driving. I will shut the engine off and notice that cooling is coming out. Is the issue the thermostat, and if so how do I replace it?

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Coolant leaking from water pump problem or circulation problem driving it will create more problems that are very costly tochange thermostat there are 4 ten mill nuts on water pump cover two bolts on inlet side hose of engine holds thermostat

Posted on Aug 26, 2008


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How do I bleed the cooling system on Toyota fortuner 4d4 30 diesel engine

Fill the system with coolant squeezing the rad hoses to expel some of the air If u can't find a bleed plug then run engine at fast idle say around 2500 rpm turn the heaters on hot put fan on with out air on when the heaters are getting hot the water is circulating check the coolant level top up as required if heaters still hot place the coolant cap on and run until the the engine is up to temp or thermostat opened fan works as it should , turn off the engine when all the pressure has gone remove coolant cap top up and leave it off until cold most if not all the air will be gone

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Just replaced the thermostat and now there is no heat inside the cabin ?

Possible trapped air pocket. Set to full heat position, lowest fan speed, remove rad. cap, start engine and let idle for 10 minutes, then hold gas pedal at 1500rpm for two minutes then let idle for two minutes. Shut engine off , let cool for 30 minutes. Top up coolant level and reinstall cap. Drive vehicle, should get heat now.

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Thermostat replace

thermostats are always a common culprit for over heating but outer items like poor fin condition on the cores , blocked or partially blocked cores, lack of anti freeze -anti boil coolant, coolant fan not working. timing problems with the ignition, air -fuel ratio not right (too lean) gear selection ( OD not working) fan belt loose. A simple test for a thermostat operation is to start the engine cold and time how long it takes before you can feel hot water in the top radiator hose . 10 minutes at idle would be about right and if you feel the hose start to get hot then the thermostat is opening

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Engine Cooling problem 1997 Other Mazda Models 4

Are you sure that the spring side of the thermostat is toured the engine/ look for a bleeder near the top highest spot in a line or hose that may be able to release the air it may even be near the water pump side.on some water pumps for the ford's the pumps will bolt on and look almost the same but the fins on the impeller are the opposite.clock wise instead of counter clock wise or vice vars. you my wont to check with your parts supply store to see if that is possible.hope this helps give you some ideas.feel free to ask again if you would like any further assistance.thank you for asking fixya . Have a Grate Day

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1998 bmw Z3 running hot replaced thermostat and continues to run hot replaced aluminum engine 10 months ago,with cast iron engine with 68,000 miles

When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.


Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.




You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!


Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost


A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

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You say it's overheating, more info needed such as:
Is the engine temp gauge showing that it's overheating?
Is it actually 'boiling over' and losing coolant?
If it's running hot, but not losing coolant, check to see it the cooling fan is operating when the engine temp rises. You may have a bad cooling fan switch that is not signaling the fan to go on to lower the engine temp.
It could be a stuck (closed) thermostat that is preventing proper circulation of coolant after the car reaches operating temp.

Jul 28, 2009 | 2003 Ford Escape

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I had a bunch of steam coming off the engine and coolant spilled all over the place and i found a hose with a hole so i replaced the hose and drove it for about 20 minutes and then it just started running...

The thermostat could be stuck closed.
The worst case is you over heated the engine to the point you could have internal damage to the engine . I would change the thermostat first. IF that does not work , I would take to a shop to have checked out.

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1991 buick century runs great. 20 minutes dies, shuts off. no signals no signs, no lights come on. nothing. Wait 10-15 minutes starts up, then dies in 5-10 minutes. I can shift to neutral while at stop...

When you remove your thermostat check the number stamped on the thermostat. In cold weather you want a high number and opposite cold weather. Right back with number

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The car keeps overheatnig. It was good for a minute after putting some coolant in it, but when you drive it or just turn it on sitting in the driveway after about 2 minutes the therometer is all the way up...

if its the thermostat your lucky easy fix just replace it but wait until the engine is cold the bolts are a nightmare to get to you have to take off air hose and disconnect a couple coolant hoses move them aside to get to the thermostat housing on the side of the engine tricky getting to that bolt.

if its the head gasket flush the radiator with flushing agent
first drain the coolant from bottom radiator hose replace with flushing agent run car idle about 10 minutes then
remove the thermostat replace the thermostat housing then fill the coolant back up leave room for blue devil head gasket sealant about $65.00 follow the directions to the tea run for 50 minutes if it doesn't work that baby needs to get in the shop
hope this helps don't forget to rate if I was helpful.
good luck

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