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Thread: How the hell do you check timing on the M50?

  1. #1
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    How the hell do you check timing on the M50?

    I have a GM coil with spark plug wires and a timing light, but I cannot come close to seeing the TDC mark on the front of the motor... how the hell do you check the timing?! What's the trick!?!!

  2. #2
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    you wanna get to TDC? well besides the timing marks up front , you can pull the 1# spark plug and turn the crank over to see when you get to tdc-

    and poor mans gauge it ( filler rod and move crank back and forth until the height is equalized<grammer?> )

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  3. #3
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    Ok well I figured otu part of my freaking issue.

    Ive been trying to figre trigger angles for the M50 for megasquirt... a guy on the forums took this pic:



    I noticed in bentley manual that the pic in manual didnt show the gap in the teeth on the left, and that the 0/T mark was behind the teeth on the top of the wheel not on the face. I drove over to our shop grabbed my timing cover and wheel and noticed that my TDC position is COMPLETELY different than in that pic!

    I attached a picture of my wheel with the gap near where his is - clearly you see theres no TDC mark on the face of the wheel!

    Then I looked behind my wheel like bentley manual shows and found a VERY clear 0/T mark, also attached - look where the gap is relative to the first pic!!!!
    Attached Images Attached Images
    Last edited by 5mall5nail5; 07-01-2006 at 03:28 PM.

  4. #4
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    And the CORRECT picture...
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