Pontiac Grand Prix GTP Problem Report

Pontiac Grand Prix GTP Intake Manifold Gasket May Leak Coolant or Engine Oil

(37 reports)

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.

These engines generally do not blow the head gaskets. White smoke came out. I thought it was a blown head gasket, but the car only has 62,000 miles on it. It was the plastic lower intake manifold gasket. This one is the supercharged model. Get the metal gasket, do use the plastic ones as you will have the same problem later. Merle Gebers -
Constantly having to add coolant, also had white smoke under hood. Found external oil and coolant leak. Cost of repair $1300 -
engine leaking coolant and oil from intake manifold, car slightly runs hot in traffic and idling. changed thermostat, changed radiator cap,bled air out of cooling system,going to replace intake upper and bottom gaskets,this should stop leak, hope it solves heating issue. -
Losing coolant and oil, problems starting and a rough idle. -
oil and coolant leaks, external, -
oil and coolant leak replaced intake manigold gasket -
I have power steering fluid leakage since I bought the car but the problem is worse in the summertime. Now I have leaks in the oil gasket, and the man at the garage told me that it will probably get worse. Today I had brown smoke start pouring out from beneath my hood and thought there was a fire. It finally stopped and I am not sure what to do now. Don't know if I should even drive the car to a garage. -
I had my hose gaskets blow out and replaced them with metal instead of plastic had no problems since great car -
oil in coolant but no coolant leaking into the oil -
Lower intank manifold gasket deteriorated. Coolant leak on manifold -
Leaking oil and coolant -
my head gasket is cracked and I have to replace it cost around $1600.00. -
Alot of smoke out of tailpipes -
Oil in coolant, no coolant in oil. White smoke from intake manifold..engine runs fine.. -
losing coolant and oil with no visible leaks -
I have an Intake leak. -
Intake Manifold Gasket is also leaking. Estimate for replacement - $840. -
Car running hot -
Low coolant light on. Leaking antifreeze onto garage floor. Replace intake manifold gaskets, upper and lower, thermostat, oil change. Cost $1,000. -
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