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Thread: PCV Valve

  1. #1

    Default PCV Valve

    Can I run a open crankcase an eliminate the PCV...

  2. #2
    FEP Power Member dagenham's Avatar
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    Yes but why would you want to.
    Current Mustangs
    1966 6 cylinder coupe
    1984 SVO 9W
    1985 Saleen #132

  3. #3

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    Quote Originally Posted by dagenham View Post
    Yes but why would you want to.
    I was asked

  4. #4
    FEP Power Member dagenham's Avatar
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    It will make a mess as the residue and oil build up at the exit point.
    Current Mustangs
    1966 6 cylinder coupe
    1984 SVO 9W
    1985 Saleen #132

  5. #5
    FEP Power Member Ourobos's Avatar
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    Only on a boosted application, and then you'd want catch cans
    1986 CHP SSP Coupe

  6. #6
    FEP Senior Member Dave9052's Avatar
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    Back in the early 60's there were no pvc's. Motors used to have what they called blow-by tubes, which were no more than a tube that vented the crankcase. The tube would extend down below the oil pan so when you were driving the air going past the tube would help draw air and the blow-by out of the crankcase. On most of the older motors they had a lot of blow-by the time they had 50,000 miles, and motors were worn out by 90,000. Even on tight newer motors there is a lot of blow-by at high rpm's. This system is very messy and stinky the residue of blow-by is a oily mess that you do not want under your hood. So I would keep the pvc.
    Last edited by Dave9052; 10-06-2018 at 08:55 AM.

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