2001 Grand Prix GTP Chronic Overheating Problem

[zepol]

I decided intead of flushing the old radiator to go ahead and just replace it with a new one. If I am replacing the radiator is there any place for the gunk to be trapped in the system anywhere that I should look to clean prior to putting the new radiator in and putting everything back together?

Also I was never answered when I asked about the LIM Gasket. I am not familiar with this gasket or where it is. Can you guys elaborate on this?

[BNaylor]

Originally Posted by zepol

I apologize but I'm not familiar with the term OP. I know that I have the stock PCM becuase the car is fully stock with the exception of the 180 t-stat I just threw in there while changing the hoses on Wed. I will look into the re-programmed PCM module. Is it difficult to install? I will be putting a new radiator in the car today....I figure other than sensors I have pretty much replaced the whole system within the past year and nothing has seemed to work. I bet if I would have just done the radiator all my troubles would seem so far away. LOL

OP means Original Poster meaning you.

No. The PCM is a DIY job. Located inside the air box assembly with the air filter. But IMO the radiator is the best option for now since the engine temperature and cooling should be normal stock without installing a new PCM.

The LIM (lower intake manifold) is below the Eaton M90 Gen 3 supercharger which mounts directly on the LIM. It is a good idea to replace the LIM gaskets with the newer GM aluminum framed or aftermarket FelPro brand. It is not a matter of if they will go bad but when. Just a matter of time.

[zepol]

I switched out the radiator today for a new one. Walla! It did the trick. I think that for whatever reason the original hoses that were on the car had deteriated to the point where they were really spongy. It had been suggested by the dealer that I should change them but because I didn't have the money at the time. I put it off. Putting it off for so long I believe turned the inside of those hoses so soft that it created a rubbery gunk that clogged the radiator. I am a bit upset that not one of the 10 times that I was at the dealership while my car was still under warranty did they ever consider that the radiator might be the culprit but hey....truth is I have now done enough on this car that I doubt I will ever take it to a dealer again because of the satisfaction and money savings of doing it yourself.

THANK YOU GUYS SOOOOOO MUCH FOR YOUR HELP. YOU GUYS ARE THE BOMB!