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.
Intake Manifold Gasket May Leak Coolant or Engine Oilon Pontiac Grand Prix GTP
Average mileage : 123,221 (40,000–174,375)
39 people reported this problem
22 people shared problem details
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
2000 Pontiac Grand Prix GTP130,000Visitor
CONSTANTLY ADDING COOLANT
2004 Pontiac Grand Prix GTP147,000Visitor
Constantly having to add coolant, also had white smoke under hood. Found external oil and coolant leak. Cost of repair $1300
2004 Pontiac Grand Prix GTP83,000Visitor
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.
2004 Pontiac Grand Prix GTP80,000Visitor
Losing coolant and oil, problems starting and a rough idle.
2004 Pontiac Grand Prix GTP47,000Visitor
oil and coolant leaks, external,
2004 Pontiac Grand Prix GTP174,375Visitor
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.
2004 Pontiac Grand Prix GTP132,000Visitor
I had my hose gaskets blow out and replaced them with metal instead of plastic had no problems since great car
2000 Pontiac Grand Prix GTP97,452Visitor
oil in coolant but no coolant leaking into the oil
2005 Pontiac Grand Prix GTP172,000Visitor
i have added oil and coolant and yet my car is still over heating and white smoke is coming out
reading coolant temp sensor high voltage ive replaced sensor and wire harness and still reading the same same code.
2002 Pontiac Grand Prix GTP90,000Visitor
Lower intank manifold gasket deteriorated. Coolant leak on manifold
2000 Pontiac Grand Prix GTP142,000Visitor
Leaking oil and coolant
2004 Pontiac Grand Prix GTP136,000Visitor
my head gasket is cracked and I have to replace it cost around $1600.00.
1998 Pontiac Grand Prix GTPVisitor
Alot of smoke out of tailpipes
1998 Pontiac Grand Prix GTP97,000Visitor
Oil in coolant, no coolant in oil. White smoke from intake manifold..engine runs fine..
2002 Pontiac Grand Prix GTP122,000Visitor
losing coolant and oil with no visible leaks
1997 Pontiac Grand Prix GTP137,000Visitor
I have an Intake leak.
1999 Pontiac Grand Prix GTP126,000Visitor
Intake Manifold Gasket is also leaking. Estimate for replacement - $840.
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