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2002 Pontiac Grand Prix Repair Question


Topics covered: Coolant, Radiator, Gas.
Mileage: 150,000 miles.

Asked on July 12, 2012

Pontiac grand prix overheating

Hi so my 2002 Pontiac grand prix is overheating once again we changed the thermostat and radiator cap the first time it started this.its overheating only when stopped liked befor also we kept driving it and eventually it just stopped over heating untill the other day when we noticed brown gunk on the radiator cap .we flushed it out and got the brown gunk out now it overheats again any suggestions ?
Avatar Asked by jamiegarcia

Answer

Replied on July 12, 2012

sealer is always a bad idea. it clogs the radiator and needs to be acid flushed to get it out.

from overheating, you need a leak down test to confirm you did not damage the head gaskets.

Roy

Tiny Answered by ASEMaster6371 (expert)
24,845 answers provided
Replied on July 12, 2012

I never used a sealer at all and to flush it I used prestone im assuming the gunk in there was blocking the problem so it didnt overheat now that its out it overheats again . maybe a water pump?

Tiny Response from jamiegarcia
2 questions asked
Replied on July 12, 2012

Also there is coolant in the oil so I dont think its a blown head

Tiny Response from jamiegarcia
2 questions asked

Replied on July 12, 2012

if there is coolant in the oil as you said, then it does have a blown head gasket.

the gunk must be pressure flushed with acid to rid it of the stuff and re gain flow.

Roy

Tiny Answered by ASEMaster6371 (expert)
24,845 answers provided
Replied on July 12, 2012

Any other suggestions ?

Tiny Response from jamiegarcia
2 questions asked
Replied on July 12, 2012

not until those are confirmed, especially the fact that you confirmed the head gasket is bad with coolant in the oil.

roy

Tiny Answered by ASEMaster6371 (expert)
24,845 answers provided

Replied on July 12, 2012

Im sorry I meant there is NO coolant in the oil

Tiny Response from jamiegarcia
2 questions asked
Replied on July 12, 2012

we are still at the radiator needing to be flushed out for flow with a pressure treatment.
Roy

Tiny Answered by ASEMaster6371 (expert)
24,845 answers provided
Replied on July 12, 2012

There is no coolant in the oil I meant

Tiny Response from jamiegarcia
2 questions asked
Replied on July 12, 2012

same answer as above.

Tiny Answered by ASEMaster6371 (expert)
24,845 answers provided