What do I do about my Cadillac DeVille over heating? I just changed the thermostat.

Asked by Jun 24, 2016 at 07:16 AM about the 2000 Cadillac DeVille

Question type: Maintenance & Repair

Whenever I drive I get a good 15-20 mins
before my car starts over heating when it
does it displays "Engine Overheating" then
"Stop Engine" what's wrong I need help!  

-please anyone. Thanks

3 Answers

78,055

Make sure the cooling system is purged from air pockets, & that the fan is working.

25

have a pressure test done, could be a blown head gasket if it over heats that quick

78,055

Yes, so did it hold pressure? On a head gasket you would have white smoke coming out the exhaust when running, or oil getting into the cooling system or vise versa, coolant getting into the oil pan. What you could do would be a compression test on all the cylinders. One or more cylinders with low compression would help determine a bad head gasket, along with the pressure test on the cooling system.

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