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
Oldsmobile Silhouette Intake Manifold Gaskets May Leak Coolant or Engine Oil
Oldsmobile Silhouette Problem
Engine Affected: 3.4L V6
Average Mileage: 110,554 mi (56,000 mi - 170,000 mi)
Visitor, 2003 Oldsmobile Silhouette, 100,000 mi
Had to have the intake manifold gasket replaced exactly 2 years ago at 81K miles at a cost of $1500 and now it has failed again. This part should last to at least 120K by most accounts and now I'm looking at replacing again.
Intake manifold gasket developed coolant leak Replaced gasket.
This same problem developed at 59,000 miles and was corrected exactly the same way.
This was corrected on both occasions very early upon noticing the odor of coolant.
The engine has always been serviced with Mobil 1 synthetic oil and that may have help prevent any internal damage.
Visitor, 1999 Oldsmobile Silhouette, 3.4L V6, 125,000 mi
running hot,got rad. flush. run good 5 mins., coolant all on ground
Visitor, 1996 Oldsmobile Silhouette, 85,000 mi
Manifold leaks oil a quart a month
Visitor, 2002 Oldsmobile Silhouette, 3.4L V6, 111,000 mi
Intake manifold gasket leak very expense repair gm knows and never issued a recall
Visitor, 2003 Oldsmobile Silhouette, 3.4L V6, 56,000 mi
I took my car in to Gregg Young Chevrolet for new tires they did an engine check and said that all the gaskets and seals needed to be replaced. We had them replaced for over $1000. 2 weeks later car died and I am now told I need a new engine. They are telling me that damage had already been done to the engine prior to my replacing the gaskets and seals. Why did they not check to be sure there wasn't damage done before charging me for gaskets and seals?
Visitor, 2002 Oldsmobile Silhouette, 3.4L V6, 125,000 mi
manifold gaskets are crap