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 blue smoke from exhaust from 96 Riviera

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rivieraking
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Name : Dwight
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PostSubject: blue smoke from exhaust from 96 Riviera   Sun Jun 28, 2015 3:29 am

After 20 to 30 minutes of driving I see blue smoke from exhaust, which indicates burning of oil. PCV valve has been changed. Can anyone tell me the cause of this? Thanks!!!
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LARRY70GS
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Name : Larry
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PostSubject: Re: blue smoke from exhaust from 96 Riviera   Sun Jun 28, 2015 7:19 am

The usual cause is worn valve guides/seals and/or worn rings. If there is too much oil up in the heads, it can make the car smoke. Years ago when I was young and inexperienced, I replaced the valve cover gaskets on my 1972 Skylark 350. I scraped off the old cork gaskets, and missed a few big pieces when cleaning out the heads. The result was blocked drain back holes. Oil was sucked down the guides and the exhaust would smoke blue.

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98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
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rivieraking
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PostSubject: Re: blue smoke from exhaust from 96 Riviera   Sun Jun 28, 2015 7:23 am

Wow I never knew that. I was under the impression that the plastic lower intake gaskets are shot and I bought the aluminum ones. They haven't been replaced before and the car has 208,000 mi. I'm thinking about just overhauling the entire engine.
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