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Pontiac Grand Prix Intake Manifold Gaskets May Leak Coolant or Engine Oil

 
Pontiac Grand Prix Problem
53 Reports
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Model Years Affected: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006

Engines Affected: 3.1L V6, 3.4L V6, 3.8L V6

Average Mileage: 120,893 mi (60,000 mi - 263,000 mi)

Verified

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. Our technicians tell us that operating the engine  with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.

  • p_fultz, , 3.8L V6, 113,023 mi
     Rookie

    Well, when i started my car i saw nothing but white smoke billowing from the tail pipe. Now car the rides extremely rough, i had it towed to a shop and they told me that i needed another engine, but after reading about how common this problem is i think i need a second opinion.

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  • Visitor, , 99,500 mi

    Oil found mixed into coolant resivour

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  • Visitor, , 120,231 mi

    The coolant is leaking in to the engine,the intake manifold gasket is being replaced to correct.

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  • hotrodgirl, , 3.8L V6, 263,000 mi
     Rookie

    This has been an awesome car with regular maintenance and normal wear/tear replacement parts but after replacing the AC condenser, it will run hot (210 degrees) and the TEMP light will come on. Fans both run, radiator is full. Runs fine in the cooler months and in the hot months (100+ this year)without the AC on. Noticed some oil residue around the opening of the radiator but no water in the oil, no white exhaust. Otherwise still squalls the tires and hugs the corners great. Any suggestions?

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  • Visitor, , 3.8L V6, 95,000 mi

    Ruined my cat, had both img's replaced. Common issue with this car.

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  • Visitor, , 3.1L V6, 120,000 mi

    Leak from intake under the thermostat housing

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  • Visitor, , 3.8L V6, 141,000 mi

    my son checked the oil and it was very low.we checked for leaks everywere.but none to be found.and it dont smoke. noticed milky color in oil cap and radiator cap.most likley head gasket.also has a small skip but thats most likly the water in the oil.also head lights want work on dim.But over all great car that will fly. r ROLL TIDE

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  • Visitor, , 3.1L V6, 80,000 mi

    very common problem with these vehicles. GM had a class action suit against them and i was not informed of the suit until it was too late. i should have been reimbursed for the cost of replacing the manifold gaskets but was never notified.

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  • xenite, , 3.1L V6, 150,000 mi
     Rookie

    didn't know what it was for a long time but certainly noticed it, been trying to diagnose the car, read about that, pulled apart the plenums and sure enough not only was it blasted, but was a felpro gasket so it was already changed at least once before i got the car. put the car back together and won't start, careful with putting it back together, no idea what we are missing now

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  • Visitor, , 3.1L V6, 120,000 mi

    car has smelt of burned antifreeze for a while when shut off after being warmed up. had manifold gasket diagnosed but did not get a price quote to fix it $?.

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