OK Need Serious Advice Major Engine Problems

[TheGuyz]

Is the equation

>= 65 heat good engine not over heat with heat on,
< 65 engine overheats with heat on

car must be possesd as it is doing everything in reverse diagnostics.

[alh27]

Yeah thats what its doing. It's crazy i can't figure it out. It's the strangest thang I've ever heard of???

[muff34]

Originally Posted by alh27

Yeah thats what its doing. It's crazy i can't figure it out. It's the strangest thang I've ever heard of???

Well are there any updates as to what the problem is?

[alh27]

nothing yet??? anybody else have any ideas??

[muff34]

Originally Posted by alh27

nothing yet??? anybody else have any ideas??

send a private message to richtazz over in Grand Prix forum and run it by him. No disrespect to any people here but he is a Gm parts guy and seems very knowledgeable. bnaylor is also good but he`s into Gp`s. let us know how you make out Good Luck

[richtazz]

Sounds like you have an air pocket in the cooling system. The heater core in your car is one of the highest points in the cooling system, so that is where the air settles when you shut off the car. When you turn on the heater, coolant pushes the air pocket into the engine, where it's getting staying in the cylinder head causing the engine to rapidly overheat. There should be a coolant bleeder valve on the t-stat housing that will help in bleeding the air out. A good repair manual will have the proceedure in it. Getting the air out is a pain in the a$$, but that's the problem you are having.