NEED HELP back pressure in my valve covers tons of white smoke in exhaust

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Oct 15, 2009 | 3:52 PM

fishn4112

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Joined: Oct 2009

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NEED HELP back pressure in my valve covers tons of white smoke in exhaust

i have back pressure building up in my valve covers that blows off my filler cap and pcv valve which is new and working there is also alot of smoke out the tailpipe and black carbon or oil dripping out the tailpipe 92 s10 blazer 4.3

Oct 15, 2009 | 4:38 PM

old dog

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pressure

not sure but sound's like you have a busted piston or rings pressurizing the crank case or the pcv system is not working .how much water in the exhaust and when ?pressure check the cooling system ,to rule out a blown head gasket .

Last edited by old dog; Oct 15, 2009 at 4:43 PM.

Oct 15, 2009 | 5:58 PM

MDTAHOE

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Joined: Nov 2008

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From: Bowie, MD

Pull the hose off the other valve cover (opposite of PCV valve) see if it will suck a piece of paper against the valve cover. If it does not the pcv passages are blocked in the valve cover.