Car smoking when letting out of boost

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Jun 17, 2016 | 06:33 AM

dieselman88

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Car smoking when letting out of boost

I have a 98 Trans am, ls1 with a good ole on3 76mm turbo. Car runs good just noticed that it randomly throws blue smoke, oil, out the tail pipe but only when I come out of heavy boost pull about 10psi (tons of boost I know lol). It does have a oil restrictor in the oil feed line, since it has a high volume oil pump. I ran the drain line to the oil pan using one of the members on here set up, can't remember his name, and got rid of the scavenger pump. There is no flat spots in my drain line. Also has the stock ls1 pcv set up with a Norris catch can. Could my turbo be passing oil, or is my pcv set up not effiecent enough? I have to pull the intake here soon anyway and thought about switching to the ls6 pcv set up, I don't know if that would help anyway.

Jun 17, 2016 | 02:10 PM

forcd ind

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From: woodbine, md

I ran the LS6 PCV system, it would suck oil into the intake-I installed an oil sep., it showed the oil getting in there, so I switched to a PCV valve in the valve cover.
Sometimes worn rings, guides can get oil in the cyls

Jun 17, 2016 | 03:58 PM

Dimeomboost

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From: Emory Texas currently

Mine did the same thing same turbo but the 88mm same setup basically and until I used mighty mouse's diagram on crankcase pressure it smoked on decel at about 10psi