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355 cam timing question

Discussion in 'Technical Q&A' started by strosek, Dec 12, 2011.

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  1. strosek

    strosek Karting

    Sep 23, 2010
    79
    Arkansas, USA
    Full Name:
    Eric
    #1 strosek, Dec 12, 2011
    I finally got the heads back from the machine shop with new guides. I am starting the cam timing procedure. My question is concerning top dead center. Normally on a motor the crank keyway is pointing straight up at top dead center. All the pictures in the service manual show the keyway straight up, but when I set top dead center the keyway is about 30 degrees before straight up. Is this normal, I don't see any way this can be changed, but would still like to know if it is normal.
    Thanks,
    Eric
     
  2. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    13,667
    San Carlos, CA
    Full Name:
    Mitchell Le
    #2 yelcab, Dec 12, 2011
    does it line up with the cylinder bank on the right (passenger side)?
     
  3. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,257
    socal
    #3 fatbillybob, Dec 12, 2011
    I never looked at keyway. Go by #1 at TDC with dialguage or piston stop. That is the gold standard.
     
  4. strosek

    strosek Karting

    Sep 23, 2010
    79
    Arkansas, USA
    Full Name:
    Eric
    #4 strosek, Dec 12, 2011
    That is what I did but the pictures in the SM had me doubting myself.
    Yes it does line up with cyl #1.
    Eric
     
  5. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,792
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #5 plugzit, Dec 12, 2011
    When you put the front pulley on, the mark on the pulley will be straight up. The keyway merely aligns the pulley.
     
  6. strosek

    strosek Karting

    Sep 23, 2010
    79
    Arkansas, USA
    Full Name:
    Eric
    #6 strosek, Dec 12, 2011
    Thanks Plugzit, I found the mark on the pulley and it is correct.
    Thanks all
    Eric
     

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