[Question] Ex, rockers.
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Ex, rockers.

  1. #1
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    Default Ex, rockers.

    Looking for advice, I have a new to me Gen V BBC tall deck, I pulled the girdle and rocker arms off to check everything out and noticed that exhaust rocker are hitting the poly locks at close to max lift, looks like the builder ground the slots the clearance them, any suggestions on what I need to do to correct this? Roller cam 825 lift, comp rocker arms.

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  3. #2
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by Bobbylisa View Post
    Looking for advice, I have a new to me Gen V BBC tall deck, I pulled the girdle and rocker arms off to check everything out and noticed that exhaust rocker are hitting the poly locks at close to max lift, looks like the builder ground the slots the clearance them, any suggestions on what I need to do to correct this? Roller cam 825 lift, comp rocker arms.
    I would first check rocker arm geometry and make sure the pushrods are the correct length.

  4. #3
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    I agree with the possible incorrect push rod length.
    When the rocker is in the extreme opposite position, is there still clearance for the Poly Lock? While there is a method to set up the geometry, it should normally have clearance at both extreme lift and at the other extreme too.

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  6. #4
    Can't re-Member 28Eliminator's Avatar
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    Quote Originally Posted by obnoxious001 View Post
    I would first check rocker arm geometry and make sure the pushrods are the correct length.
    ^^^ This^^^

    Use the mid-lift method to determine correct pushrod length.




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    I'd agree with you, but then we would both be wrong

  7. #5
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    Quote Originally Posted by jimsplace View Post
    I agree with the possible incorrect push rod length.
    When the rocker is in the extreme opposite position, is there still clearance for the Poly Lock? While there is a method to set up the geometry, it should normally have clearance at both extreme lift and at the other extreme too.
    Yes there is clearance when the valve is closed.

  8. #6
    Senior Member capnfyr's Avatar
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    Default Tall deck.

    Go on you tube and look up the Straub engineering video on how to determine correct push rod length. This easy to follow and understand video is done by Scott Foxwell and goes through the process step by step. It's definitely helped me out when you get into or find these situations. Good Luck.
    Capnfyr
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  9. #7
    steelcomp was here
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    Hope this helps:

    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  10. #8
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    Quote Originally Posted by scott foxwell View Post
    Hope this helps:


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