# Cadillac overheats

**URL:** <https://community.cartalk.com/t/cadillac-overheats/106456>\
**Category:** Maintenance/Repairs\
**Tags:** deville, cadillac\
**Created:** [July 31, 2017, 10:52pm UTC](https://community.cartalk.com/t/cadillac-overheats/106456 "2017-07-31T22:52:41Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![danahcain50](https://avatars.discourse-cdn.com/v4/letter/d/858c86/32.png) [@danahcain50](https://community.cartalk.com/u/danahcain50)\
**Post date:** [July 31, 2017, 10:52pm UTC](https://community.cartalk.com/t/cadillac-overheats/106456/1 "2017-07-31T22:52:42Z")

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This car overheats after twenty minutes but only in the heat what could it be

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**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\
**Post date:** [July 31, 2017, 10:55pm UTC](https://community.cartalk.com/t/cadillac-overheats/106456/2 "2017-07-31T22:55:46Z")

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Low coolant, coolant pressure, or a bad fan come to mind. Assuming the AC is running.

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**Author:** ![familyguy](https://avatars.discourse-cdn.com/v4/letter/f/f07891/32.png) [@familyguy](https://community.cartalk.com/u/familyguy)\
**Post date:** [July 31, 2017, 10:56pm UTC](https://community.cartalk.com/t/cadillac-overheats/106456/3 "2017-07-31T22:56:46Z")

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I had that same problem, my thermostat was stuck.

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**Author:** ![common-sense-answer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/common-sense-answer/32/716_2.png) [@common-sense-answer](https://community.cartalk.com/u/common-sense-answer)\
**Post date:** [August 1, 2017, 12:07am UTC](https://community.cartalk.com/t/cadillac-overheats/106456/4 "2017-08-01T00:07:29Z")

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> [@danahcain50](#):
>
> This car overheats after twenty minutes but only in the heat what could it be

Nobody can tell from here. Only possibilities can be suggested.

One thing for sure is that if it really is getting too hot then each time it happens threatens and or shortens the life of the engine.

Get it diagnosed and corrected before driving this car.  
_ **CSA** _

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [August 1, 2017, 12:08am UTC](https://community.cartalk.com/t/cadillac-overheats/106456/5 "2017-08-01T00:08:23Z")

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Northstar motor? Headgaskets.

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**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\
**Post date:** [August 1, 2017, 8:29pm UTC](https://community.cartalk.com/t/cadillac-overheats/106456/6 "2017-08-01T20:29:38Z")

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What year, what is the mileage, and what is the engine?

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**Author:** ![Joebo121](https://avatars.discourse-cdn.com/v4/letter/j/ec9cab/32.png) [@Joebo121](https://community.cartalk.com/u/Joebo121)\
**Post date:** [August 1, 2017, 10:28pm UTC](https://community.cartalk.com/t/cadillac-overheats/106456/7 "2017-08-01T22:28:47Z")

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I would check the thermostat first AFTER making sure the coolant level is good.

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [September 18, 2017, 1:32am UTC](https://community.cartalk.com/t/cadillac-overheats/106456/8 "2017-09-18T01:32:39Z")

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One more possibility, air trapped in the cooling system. In anything related to the cooling system was repaired soon before this symptom appears, definitively should be considered.