Thread: 2001 Grand Prix GT: possible multiple issues...

Originally Posted by Burbman

If 2 radiators cracked in the same place I would look at the subframe flexing....the car will overheat and go into limp mode well before the radiator crackes for being overtemp. I think the subframe is flexing and exerting pressure on the radiator mounting points and causing it to crack. No coincidence that it idled fine in the driveway for 20 mins and then cracked in the same place 1/4 mile down the road. can you post pics?

What subframe? When we replaced the radiator, we didn't miss anything, and didn't notice anything that would cause a flex...it seemed to be pretty solid once we put it all back together. What, on this car, is 'limp home' mode? I will get some shots as soon as the weather clears around here...rain right now...

Gentlemen, thanks so much for the help!!

Is there any possibility that a cracked intake manifold might be the problem, consider the pressure issues?