Question about 2002 Oldsmobile Silhouette

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Lower intake manifold gasket leaking 02 Olds Silhouette

How do you replace the lower intake manifold gasket on an 2002 Oldsmobile Silhouette?

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  • Anonymous Mar 14, 2014

    I'm replacing both my exhaust and my intake manifolds my 69 ford f100 inline 6 do I need gaskets

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This is basicly a very time consuming job rather than a physically hard one to complete. In order to replace the gasket you must remove the intake plenum,throttle body, and misc. vacuum hoses. The wiring harness connections must also be disconnected. Finally the intake manifold is exposed. The bolts holding the manifold to the block are removed exposing the leaking gasket. After removing the push rods and placing them in the correct order to be replaced the gasket and sealants can be removed. Finally replace everything in reverse order. Be sure to consult a GM manual for correct bolt torch specs. The correct specs for the manifold bolts usually come with the gasket. Make sure to change your oil a few times after this job in case any coolant entered the block. Also,change the thermostat and the oil seal on the distributor half shaft cap while you have everything off. Good Luck

Posted on May 12, 2009

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Hey, did this solution work for you van? Is it still running and what problems are you currently having with it if any? Thanks!!!

Posted on Jan 17, 2010

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  • Oldsmobile Master
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Hi! I just finished working on a 2001 Olds Silhouette van with a leaking intake gasket.
The lady I was helping was not financially capable of the best fix,,,,replacing the gasket. SOoooooo.......I gave her the cheapest fix I could,which i know isn't usually a permanent solution,and I told her so.
First,I took the pressure off her cooling system by removing the lower gasket on the radiator cap.I told her she must always keep a 60% antifreeze
to 40% water ratio in her cooling system,or the coolant will boil,creating air bubbles.
Then,I found the 32.00 dollar Bar's Leaks head gasket repair bottle at Auto-Zone, and after draining a little antifreeze out,REMOVING the RADIATOR CAP, added the contents,refilled the radiator,replaced the cap and filled the expansion tank.
Starting the car, the bad leak stopped almost immediately. She took the car home and it was okay,but the temp was up some in that short trip.
Hmmmmm.......I had suspected I might not have gotten ALL the air out of the block and intake.I was right.It overheated the next day.
I had her bring it back, and I bled the air out of it by loosening the radiator cap and opening the bleeder nuts(one at the thermostat housing and one on the water pump.
After revving the engine for a minute at 3000 rpm, the air left,and the lower radiator hose got warm like it should.
Just passing this info. along as it might help for a cheap fix to those not made out of money or who might not be keeping the car forever. don-ohio
(:^)

Posted on Dec 12, 2012

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