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.Google+
Car Problem Reports
Pontiac Grand Prix Intake Manifold Gaskets May Leak Coolant or Engine Oil
Pontiac Grand Prix Problem
Engines Affected: 3.1L V6, 3.4L V6, 3.8L V6
Average Mileage: 122,231 mi (10,000 mi - 278,000 mi)
Visitor, 2003 Pontiac Grand Prix, 99,500 mi
Oil found mixed into coolant resivour
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.
Visitor, 2006 Pontiac Grand Prix, 120,231 mi
The coolant is leaking in to the engine,the intake manifold gasket is being replaced to correct.
Visitor, 2002 Pontiac Grand Prix, 3.8L V6, 95,000 mi
Ruined my cat, had both img's replaced. Common issue with this car.
Visitor, 2006 Pontiac Grand Prix, 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
Visitor, 1998 Pontiac Grand Prix, 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.
Visitor, 1998 Pontiac Grand Prix, 3.1L V6, 120,000 mi
Leak from intake under the thermostat housing
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?
Visitor, 1998 Pontiac Grand Prix, 3.1L V6, 10,000 mi
Had this problem from the get go.
Took it into the dealer for a ticking noise under the hood... they sent me out of the shop making me look like a damn fool that the noise is normal & anything worse is in my head (cuz I'm a girl?)
Smoke coming out of tailpipe... no matter where I took it they made it sound like a big job to do & they can do it when they are less busy which they rarely are.
So my dad (a smart guy but an asshole) said it is a simple & quick repair that he'll do when I change the oil next time... well that is not going to happen, I rather pay someone to fix it than to have him do it. Now I will go to the shop & tell them what to change & will update this post accordingly
Visitor, 1996 Pontiac Grand Prix, 3.4L V6, 200,000 mi
car miss-fires up until you get it above 2000 rpm but doesnt miss fire if its been on for awhile replaced the head gaskets intake gaskets all of them it fixxed the problem right up