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Thread: Oil bypass valve - to plug or not to plug

  1. #1
    BobS
    What is the conventional wisdom on pugging the oil filter bypass valve on a Gen IV BBC? I heard that they start bypassing at around 4 psi. Wouldn't this let a lot of unfiltered oil through the engine even at an idle? So if one were to defeat the bypass, what precautions should be taken?

  2. #2
    Infomaniac
    If you do - use a good filter with an internal bypass.

  3. #3
    Senior Member
    Join Date
    Mar 2010
    Posts
    883
    RACE engine only for plugged by pass. Do not do it on anything else.
    Chris

  4. #4
    Turbojack
    put the 30 psi bypass in. That way it will not bypass unless you are having major problems

  5. #5
    jet4fun
    Originally posted by Infomaniac
    If you do - use a good filter with an internal bypass.
    i recommend baldwin filters, and i know where to get them if you cant find them

  6. #6
    superdave013
    Originally posted by jet4fun
    i recommend baldwin filters, and i know where to get them if you cant find them
    That's all I run. Baldwin part #279

  7. #7
    Senior Member
    Join Date
    Jun 2009
    Posts
    10,871
    Baldwin's and k&N's in stock here if you need. Both exlent filters.

  8. #8
    BobS
    Ok, thanks for the info. I was looking at the Baldwin specs and it has a built in 20 psi bypass. Even at that, I run around 40 psi at an idle. I guess I'll leave well enough alone for now and keep my ears open for other options.
    Thanks again

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