Question about 1998 Buick Park Avenue

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1998 Buick Regal intake manifold leaking coolant into cylinders. Need information on how to take apart and repair. Thanks, MB

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  • Anonymous Jan 13, 2009

    99 regal will not start due to intake manifold

  • Anonymous Jan 13, 2009

    1999 buick regal will not start due to intake manifold leaking into cylinders

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Hello I just took it appart in 2 and a half hours..I am a novice/ametur mech....You have to first unplug all your wires to the fuel rail/altinators/fuel lines/clips all around the top of the engine...Remove altinator/carefuully remove the coolant housing and adjustment pully/then remove a few brackets with the ten mm socket...You then take off the 10 bolts holding the black plentum/then u will see the 12 bolts holding the intake...You remove those and 2 hidden bolts in the intake and BAM she is out..!!!
If I skipped a few things they are self explainatory...Basically unhook a line here.....disconnect a small plug there....VERY EASY GIG i recomend all to do it.!!!!!!!!!!!!! ME 32 yrs old and 2 and a half hours and a bucket of sockets and 100$ For top and bottom gaskets..Both of mine were shyt

GARY THE EVERYTHING POSTED THIS

Posted on Mar 26, 2009

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All engines have vacuum created in the intake manifold, because the pistons are pulling in air into the cylinders from the intake manifold, resulting in a pressure drop in the intake. A leak is caused when the intake manifold gasket is bad, or when a vacuum hose off the intake becomes disconnected or breaks. The hose will then **** extra air into the intake, causing a higher than normal idle, maybe a rough running condition, and can be identified by a slight whistling noise at the break or at the disconnected end of the vacuum hose.

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This one is a little different and harder to diagnose....as you said it has locked the engine....this is called hydraulic lock and is due to water NOT being compressible......so if the engine is locked what further damage has this caused ?????

I have seen conrods bent and vales damaged due to hydraulic lock......I would suggest having the cylinder head removed at least to inspect.

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Car runs fine for a while the cuts off without warnig must cool off for 15 or20 minuits before it will restart 1993 buick regal 3.1 engine


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These cars do not have head gasket problems you need to remove the sparkplugs to get the coolant out and replace the black upper intake manifold as they will leak coolant into the combustion chamber. Common problem.

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