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Piston replacement

Discussion in 'The Hokey Ass Message Board' started by mayerst, Dec 11, 2010.

  1. mayerst
    Joined: Mar 3, 2008
    Posts: 23

    mayerst
    Member

    Hello all,
    Someone asked for help in installing their pistons while rebuilding the motor (1989 4.3 v6). The rods and caps have numbers stamped on them, do these numbers follow the firing order or do they go in sequence? Thanks to all who help.

    Tom<!-- google_ad_section_end -->
     
  2. In sequence from front to back is the accepted norm. So, 1 and 2 would be on the first journal, 3 and 4 the next, etc.

    Cosmo
     
  3. oneratfink57
    Joined: Feb 12, 2006
    Posts: 737

    oneratfink57
    Member
    from Wisconsin

    They are for cylinder numbers. Starting from the front to the back. Odd numbers left bank. even numbers right bank. SBC without cylinders 7 and 8.
     
  4. mayerst
    Joined: Mar 3, 2008
    Posts: 23

    mayerst
    Member

    Thanks for the fast reply, I'll let you know how it works out.

    Tom
     

  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 31,009

    Mr48chev
    ALLIANCE MEMBER

    That doesn't always hold water due to the fact that a great number of engines have the odd numbered cylinders on the right (American car passenger side) bank.

    But most are stamped front to back no matter what the configuration of the block.
     
  6. mayerst
    Joined: Mar 3, 2008
    Posts: 23

    mayerst
    Member

    Thanks again guys, I knew I asked the right bunch.
     
  7. blackrat40
    Joined: Apr 19, 2006
    Posts: 1,167

    blackrat40
    Member Emeritus

    Make sure you don't mix the rod caps up as they are NOT
    interchangeable.The bearing lock notches should be adjacent.
    Also most pistons have a front and back. Usually a notch on the
    top of the piston edge that goes toward the front.
    Some older ones have a "F" marked on the side of the piston
    by the wrist pin. Faces the front.
    If you already knew this, maybe it will help those who didn't.
     
  8. oneratfink57
    Joined: Feb 12, 2006
    Posts: 737

    oneratfink57
    Member
    from Wisconsin


    I understand that but as far as the 4.3L Chevrolet it is odd on the left even on the right. I drive an 03 s10 with that same engine but i understand your clarification

    However it was my assumption that it was the 4.3 V6 chevrolet from 1989. but as far as i know there's no other 4.3L v6 from this time period
     

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