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One day I was sitting with the car idling and the

Sent to Car Experts February 09, 2006 10:06 a.m.

One day I was sitting with the car idling and the heater on. A sound came from under the hood much like a very quick thudding sound and the thermometer raced up to HOT. I turned the engine off quickly and waited about 10 minutes and then started it right up with no sound and no problem. Until this morning. I had the heat on but nothing warm came out only cold and after about a 5 minute drive I heard the same noise and the thermometer on the dash again shot up to HOT. I turned off the engine. There was nothing leaking and no smoke or odor of any kind. Do you think it is my thermostat? It is a 2003 Grand Prix SE. HELP!

Optional Information:
2003 Pontiac Grand Prix SE

Already Tried:
Looking at the engine..................

Customer (name blocked for privacy)

Status: Closed Value: $8

Answer
February 09, 2006 10:17 a.m. (11 minutes and 25 seconds later)

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Steve7654 -- Auto Service Technician -- 99% Positive Feedback on 1644 Car Accepts
27 yrs ASE L1 Master Technician, Service manager

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