overheated after a short trip?

1995 PONTIAC TRANS AM

85,000 MILES • V8 • 2WD • AUTOMATIC

ARASENT

MEMBER
1 POST

95 Trans Am overheated after a short trip (2-3 miles). Got "Check Guages" light on dash and the temp guage was in the red zone. I'm guessing bad thermostat and plan to replace it -- any other things I should look at?

May 9, 2011 at 12:05 PM

SQM

✓ASE Certified Mechanic
6,383 POSTS

Hello,

A stuck closed thermostat is one of the common cause of engine overheating.

https://www.2carpros.com/articles/symptoms-of-an-overheating-engine

When a thermostat fails at the closed position, it does not allow coolant to flow thru the engine. That is what triggers the engine to overheat. Usually with a stuck closed thermostat the upper and lower radiator hose will be different temperature, with one being hot another one noticeably cool.

https://www.2carpros.com/articles/how-an-engine-thermostat-works
https://www.2carpros.com/articles/replace-thermostat

Also check to see if the cooling fans are coming on. Inoperative cooling fan is another common reason for engine overheating.

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.

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Sep 26, 2021 at 2:07 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.