helmlyboy

how do I know if my ls6 valley cover has a built in pcv valve? I did the ls6 valley cover swap and don't know what yr it is or what car it came from. need help.

ssgunny

iTrader: (6)

A quick search and I found this. The first page of this thread should answer your question...specifically post 15 and 19.

https://ls1tech.com/forums/generatio...ley-cover.html

helmlyboy

I see but is there anyway to tell if the pcv is built in or do I need to put one inline. from what I found by searching is that the newer ls6 valley cover has the pcv built in and the older ones do not. Do u know when the yr change was and how to tell if mine is newer or older? I'm trying to contact the guy I bought it from to see what yr and car it's from

demonspeed

iTrader: (7)

2004 is when the PCV valve went internal; 01-03 will still be external.

jsteele90

iTrader: (13)

i dont think you will be able to tell unless you pull the intake and look at the part number

Majestic9C1

iTrader: (19)

I've got the new style on mine.. just need the cover itself and the little $7 hose and thats it..

I plan on adding a Norris catch can soon as well

helmlyboy

Ok I talked to the guy that I bought it from after digging thru paypal and he said it was from a 04 gto. So it should have the pcv internally.

Next question just to be sure could I blow in the hose to the valley cover? It shouldn't let air back in right?