OVERHEATING

2002 Pontiac Grand Prix

Tiny

jamiegarcia

July, 12, 2012 AT 8:15 PM

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 ?

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10 Answers

Tiny

ASEMaster6371

July, 12, 2012 AT 8:24 PM

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

jamiegarcia

July, 12, 2012 AT 8:34 PM

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

jamiegarcia

July, 12, 2012 AT 8:37 PM

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

Tiny

ASEMaster6371

July, 12, 2012 AT 8:45 PM

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

jamiegarcia

July, 12, 2012 AT 9:03 PM

Any other suggestions?

Tiny

ASEMaster6371

July, 12, 2012 AT 9:16 PM

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

Roy

Tiny

jamiegarcia

July, 12, 2012 AT 9:20 PM

Im sorry I meant there is NO coolant in the oil

Tiny

ASEMaster6371

July, 12, 2012 AT 9:32 PM

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

Tiny

jamiegarcia

July, 12, 2012 AT 9:51 PM

There is no coolant in the oil I meant

Tiny

ASEMaster6371

July, 12, 2012 AT 10:02 PM

Same answer as above.

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