Pontiac Grand Prix GTP Problems

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

Problem Description and Possible Solution

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.

(59 people reported this problem)

Pontiac Grand Prix GTP Vehicles With This Problem

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Average mileage: 139,849 (40,000–270,286)
9 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2004, 2005
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Viewing 1-20 of 31 comments
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.
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
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.
Constantly having to add coolant, also had white smoke under hood. Found external oil and coolant leak. Cost of repair $1300
Have oil leak dont know where it comes from. Air conditioner dont really work.if it does only on drivers side. Transmission is messed up the gear shift to. Something also about my brakes i dont trust over heats. I dont have the money to fix all this. I walk everywhere or have to find rides
low coolant light came on, had to replace the intake manifold gasket and some plastic elbow broke. now i see my coolant reservoir caked with oil.
I had my hose gaskets blow out and replaced them with metal instead of plastic had no problems since great car
Leaking coolant.. On garage floor and on manifold..white smoke out of exhaust..knocking sound on top of car in tomorrow
reading coolant temp sensor high voltage ive replaced sensor and wire harness and still reading the same same code.
Rough idle smoke and multiple symptoms of bead gasket leak. Intake gasket was leaking and fine for about a month before it began causing serious problems. Swapped an entire intake over from a parts car using new gaskets.