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Thread: timing on 345 crank and cam

  1. #1
    Join Date
    Apr 2009
    Location
    mississippi
    Posts
    137

    Default timing on 345 crank and cam

    While putting the timing gears on the crank and camshaft last night I lined up the 2 dots on them and installed the key and put the timing cover on, thinking about it this morning I didn't make sure that the #1 piston was tdc so is there a chance I am 180 off, or do you just have to line up the dots? 345 engine.

  2. #2
    Join Date
    Feb 2009
    Location
    Aiken, SC
    Posts
    2,423

    Default

    Quote Originally Posted by rwc View Post
    While putting the timing gears on the crank and camshaft last night I lined up the 2 dots on them and installed the key and put the timing cover on, thinking about it this morning I didn't make sure that the #1 piston was tdc so is there a chance I am 180 off, or do you just have to line up the dots? 345 engine.
    You just have to line up the dots. The crank and cam gears are indexed. They only go on one way. Whether the TDC is compression or exhaust is determined by cam position, so you can't get the cam out of phase. Without the cam, there is no valve action, and therefore no difference in the strokes.
    Allan E.
    Curmudgeon Extraordinaire
    Charter Member, Old Hippie IH Club
    Old fashioned binder freak

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