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PCV valve leaking oil

This is a discussion on PCV valve leaking oil within the General Help forums, part of the LSx Technical Help Section category; When i put my finger under the pcv valve it was covered in oil. I'm assuming the valve is bad ...

  1. #1
    Junior Member Blue2KTA's Avatar
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    2000 Trans Am

    PCV valve leaking oil

    When i put my finger under the pcv valve it was covered in oil. I'm assuming the valve is bad or do i have other problems ? Could i just go to the auto parts store and buy one or is this a dealer part ? I have taken the valve off before because i replaced the hose from the TB to the valve.

    Thanks

  2. #2
    Member 4thGenTA's Avatar
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    black
    2002 firebird trans am

    you can buy a pcv valve at autozone for about 3 bucks, but for the whole assembly(plastic and rubber hoses) i think its around a 100 bucks

  3. #3
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    silver
    2000 formula

    that rubber turns to crap......no wonder it leaks

  4. #4
    The Bandit Wesman's Avatar
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    1998 Trans Am WS6

    Quote Originally Posted by Blue2KTA View Post
    When i put my finger under the pcv valve it was covered in oil. I'm assuming the valve is bad or do i have other problems ? Could i just go to the auto parts store and buy one or is this a dealer part ? I have taken the valve off before because i replaced the hose from the TB to the valve.

    Thanks
    Its normal to have some oil in the PCV system. The crankcase vapors it draws out contain oil, and it accumulates in the valve and hoses. This is one of the reasons the stock PCV system is so crappy, it pulls way too much oil from the crankcase instead of just vapors.

    The solution is the LS6 style PCV system with the orfice tube/oil screen design. Much better system, cleaner look, and doesn't suck up oil like the stock system.

  5. #5
    Spaz is My Mentor SMWS6TA's Avatar
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    98 T/A w/a little mods...

    If you break the pcv rubber garment you will have to buy the whole piece. GMpartsdirect has then between $60-$80. Or you can make one for about $8 including the pcv.

    There is a couple of threads here on how to do it. Give me a min and I'll post them.

  6. #6
    Spaz is My Mentor SMWS6TA's Avatar
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    here you go. I did this and it works. again this only cost me $6-8

    PCV Valve Recommendation / Housing Modification

    another thing you need to know is if you follow the pcv line back behind the intake it merges into one line that takes it to the rear drivers side valve cover. At the merge point the rubber deteriorates and fails too causing another vacuum leak. Again you have to by the entire pcv part to fix it or you can get some vacuum line connectors and do what I did. I used one T and a L. Made my connections and it works with no issues.

    This cost me about $10 because I bought a variety box. You will need to use 3/8 size.
    Last edited by SMWS6TA; 09-20-2010 at 08:49 AM.

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