I have had an overheat issue. also water/steam comming out tailpipe. pulled intake manifold and found gasket was bad and manifold was cracked at center rear cylender. I dont see the conection between the water and the intake crack. is it more likely that the head gasket needs replacing as well or is it common for a bad intake manifold or gasket to creat this problem
will a crack in the intake manifold alow water in the cylender on 2002 Pontiac Grand Prix
by bubbarupp in Tacoma, WA on February 18, 2013
ANSWER by pushrod on February 18, 2013
More likely a head gasket! Should have done more testing before tear down, can do a leak down test now, if equipped to do so. Intake more likely to leak coolant into oil or externally. Must be the 3.8 I GUESS as it had more problems with the intake than the 3.1!