[er455]

Ok my motor is smoking on startup and on decell after reving up motor ... fresh motor I am running a pvc valve from a Toyota Supra and using a butler non baffled valley pan with pvc . I have a steel mesh breather on passenger side valve cover and nothing on drivers .. could to much crank pressure cause the turbo not to drain properly? Could the pvc valve not be working on a none baffled valley pan ? Should I add another breather to the drivers side ?

[Tom Vaught]

Problem is not the PCV Valve in most boosted engine cases IF you use a GM valve.
The GM valve seals against itself (if it sees manifold pressure (boost)). That function was put in place by GM Engineers for Backfire Protection so that a backfire could not catch the oil pan on fire. No clue how the supra valve works.

Your issues are most likely from not using a GM designed Baffled Valley pan. The race stuff typically does less of a good job in that area vs the stock stuff.

You will get oil and fumes out of the steel mesh breathers under boost because the rings never seal perfectly under boost or otherwise.

Talk to Charlie66 as he has been down that path and will have some good suggestions for you.

Tom V.

[GTOGEORGE]

I always used a PCV valve on my 1st GTO with a blower with no problem.....6-9 lbs of boost.


GTO George

[er455]

Thanks Tom

[70 bird]

FWIW I use an 03 mustang cobra pcv valve in a stock valley pan and have no problems.

[Tom Vaught]

03 Cobra Valve is available most places and does a nice job with boosted engines.

And as was posted it fits the stock valley pan grommet just fine. Low flow is about 1.3 cfm and high flow is about 3.5 cfm for the valve.

Tom V.

[er455]

Awesome thanks guys going to pick up one also I bought a new baffled valley pan I think that is going to help with oil being splashed into the pvc valve ...