building an evo motor and need help

Discussion in 'Engine, Fuel and Exhaust' started by dirtyray, Jun 4, 2010.

  1. dirtyray

    dirtyray Member

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    I got to the compression rings on the motor and was wondering about the dot that I have on one of my rings. Does that indicate direction?


    I have flat top pistons on my motor and was wondering what the ingap should be on the rings. Any help is appreciated
     
    Last edited by a moderator: Jun 4, 2010
  2. ultrat

    ultrat Senior Member Contributor

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    Been told dot up......
     
  3. stefdustin

    stefdustin Member

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    That is what I was always told: DOT UP
     
  4. Jack Klarich

    Jack Klarich Expert Member

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    Typically dot goes up and dont forget to stagger the rings and check the end gap
     
  5. Breeze3at

    Breeze3at Well-Known Member

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    Hi Dirtyray; I just consulted my '92 service manual. Here's a few specifics you might want to know.
    Compression ring end gap = .007 - .020
    oil ring gap = .009 -.052
    the dot goes up, on the 2nd ring, because it is a reverse twist to aid oil control.
    ring eng gap positions are - 2 o'clock - oil ring
    4 o'clock - top ring & oil expander
    8 o'clock - oil ring
    10 o'clock- second ring- dot up
     
    Last edited: Jun 4, 2010
  6. nwbikerid

    nwbikerid Member

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    Yep, dot up, should say that in some of the paperwork that came with the rings.
     
  7. FishHunter

    FishHunter Active Member

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    Rule of thumb is .004"-.005" per inch of bore, for ring end gaps.:D
    Scott