Intake Manifold Gasket May Leak Coolant or Engine Oil on Oldsmobile Silhouette

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.

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Average mileage: 194,093 (56,000–1,600,000)
Engine affected: 3.4L V6
9 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2004
38 people reported this problem
15 people shared problem details
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.
2000 Oldsmobile Silhouette- 3.4L V61,600,000
Oil leak above the starter
Already replaced intake gaskets twice. $1500.00 a pop. Now its fix again or just junk it. There were several hundred thousand of these vehicles and all suffered the same fate. Other than this they were good vehicles. a recall should have been done. No more GM vehicles for us.
Engine started leaking water. Tracked it down to under intake manifold. Now i am going to fix it.
2001 Oldsmobile Silhouette- 3.4L V660,000
shop did it for $850 ... Lot of labor.
My can keep heating up
At 94, 000 miles replaced transmission, 96,000 replaced motor when camshaft broke, oh also replaced head gasket at 93, 000 now at 161,000 head gasket is leaking again. Headlights alway full of water, in winter bulb would shatter in cold weather. Had to drill small hole in bottom of light to let the water drain. Driver side window needs new motor every few years. seat controll broke off , never worked well.
Head gaskets failed. Replacement was required. $2000
2002 Oldsmobile Silhouette- 3.4L V6150,000
You can smell the coolant in the cab faintly for a couple minutes after starting. Had to replace intake manifold gaskets but only cost me $500 with a coolant flush
1999 Oldsmobile Silhouette- 3.4L V6125,000
running hot,got rad. flush. run good 5 mins., coolant all on ground
Manifold leaks oil a quart a month
2002 Oldsmobile Silhouette- 3.4L V6111,000
Intake manifold gasket leak very expense repair gm knows and never issued a recall
2003 Oldsmobile Silhouette- 3.4L V656,000
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?
2002 Oldsmobile Silhouette- 3.4L V6125,000
manifold gaskets are crap
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