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Overheats on the highway but not at idle seed?

Tiny
ROBERT ELIKER
  • MEMBER
  • 1991 OLDSMOBILE SILHOUETTE
  • V6
  • FWD
  • AUTOMATIC
  • 15,000 MILES
It over heats on the highway but not at idle seed or low speeds and I replaced the thermostat and water pump and it still over heats
Tuesday, January 27th, 2015 AT 10:53 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check the radiator for cold spots if you feel ay or see any gree and loose fins around edges or bottom it's shot.
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Tuesday, January 27th, 2015 AT 12:02 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,345 POSTS
I agree with HMAC300, I would replace the radiator it must be externally or internally clogged here is a guide to help as well.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

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Saturday, September 7th, 2024 AT 9:44 AM

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