NEED HELP back pressure in my valve covers tons of white smoke in exhaust
October 15th, 2009, 3:52 PM
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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
October 15th, 2009, 4:38 PM
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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; October 15th, 2009 at 4:43 PM.
October 15th, 2009, 5:58 PM
#3
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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.
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