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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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.
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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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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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