primer84z

iTrader: (7)

I searched this and seems to go both ways. Im installing a fast 90 with TPIS 90 TB without the PCV vacuum port. Some say put valve cover breathers on, others say this wont work and will blow the gaskets. Who can put this to rest?

Spade

iTrader: (26)

You are not going to find an answer that is definite. It is all in your particular setup.

PI HAT

I can tell you that I have the original PCV setup still on mine. It works fine. I have seen guys go with the autozone breathers cause it looks cool.

semper

slowec

iTrader: (9)

Think about it. Pressure inside your crankcase building up enough pressure to push out gaskets instead of going out of a free flowing breather element. NO! Breathers are safe, but you will smell the fumes instead of making your engine eat them. The pcv system does not need to be hooked to a vacuum source, Its done for emissions and driver comfort. Unless your boosteed, then the rules change

slt200mph

iTrader: (42)

I went with a LS6 valley cover and PCV along with a breather in the passenger side valve cover...these are GMPP valve covers and have no provisions for the plumbing that you find on stock valve covers..I rinse the K&N breather out once a month..it has worked just fine for the past 2 1/2 years and 50,000 + miles..