# Odd overheating issue equinox

**URL:** <https://community.cartalk.com/t/odd-overheating-issue-equinox/200282>\
**Category:** Maintenance/Repairs\
**Created:** [May 15, 2025, 12:10am UTC](https://community.cartalk.com/t/odd-overheating-issue-equinox/200282 "2025-05-15T00:10:30Z")\
**Posts on this page:** 5\
**Page:** 2

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**Author:** ![bcohen2010](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@bcohen2010](https://community.cartalk.com/u/bcohen2010)\
**Post date:** [May 18, 2025, 12:54am UTC](https://community.cartalk.com/t/odd-overheating-issue-equinox/200282/21 "2025-05-18T00:54:22Z")

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Or maybe when the engine first overheated, the open-deck block warped just enough that even with resurfaced heads and new gaskets and bolts, exhaust gases leak out into the water jacket, displacing coolant. Or maybe there’s a hairline crack or casting flaw in the aluminum. Or maybe the exhaust is crushed or restricted, etc. Personally, anytime I see a vehicle for sale which has been overheated, I assume the engine will need to be replaced, unless it’s a closed-deck cast iron block. Anything aluminum, I assume will require engine removal, and resurfacing of the block, which would make a working used motor cheaper and easier.

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**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [May 18, 2025, 1:22am UTC](https://community.cartalk.com/t/odd-overheating-issue-equinox/200282/22 "2025-05-18T01:22:33Z")

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I think the engine is toast

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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:** [May 18, 2025, 5:41pm UTC](https://community.cartalk.com/t/odd-overheating-issue-equinox/200282/23 "2025-05-18T17:41:28Z")

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Chevy 3.4 is closed deck iron block. Seller said heads looked fine. But said resurfacing was good thing.

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**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [May 18, 2025, 7:20pm UTC](https://community.cartalk.com/t/odd-overheating-issue-equinox/200282/24 "2025-05-18T19:20:31Z")

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> [@Cavell](#):
>
> Seller said heads looked fine

His opinion is free . . .

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**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\
**Post date:** [May 18, 2025, 9:28pm UTC](https://community.cartalk.com/t/odd-overheating-issue-equinox/200282/25 "2025-05-18T21:28:02Z")

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Well just from experience, you can’t tell by looking at them. You have to do that electro test for cracks in addition to a re-surface. Then the valve job, then increased oil consumption due to higher compression, then assume everything was done right. I would never open up a high mileage engine again. My loss maybe but headaches are no fun. Magna flux. Senior moment.

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