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  1. #1

    some help needed with cam timing

    hi,I am in the proccess of rebuilding a 4-tec engine (1503), so far so good.
    now I am at the stage of putting the timingchain in place. ( i do not have the manual yet) .I put the piston#1 at tdc, and I see 2 lines on the camgear,both with 1503 written under them. I reckon these 2 lines have to be in line with the cylinderhead surface? in this position it makes the most sense regarding camlobe position and piston#1 at tdc.
    the confusing this is that there are a couple more lines on the gear (one with L ,one with R and one at the camsensorpin).hope someone can shed some light.
    regards
    BMB


  2. #2
    Top banana's Avatar
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    Quote Originally Posted by Bastiaan maarten Bok View Post
    hi,I am in the proccess of rebuilding a 4-tec engine (1503), so far so good.
    now I am at the stage of putting the timingchain in place. ( i do not have the manual yet) .I put the piston#1 at tdc, and I see 2 lines on the camgear,both with 1503 written under them. I reckon these 2 lines have to be in line with the cylinderhead surface? in this position it makes the most sense regarding camlobe position and piston#1 at tdc.
    the confusing this is that there are a couple more lines on the gear (one with L ,one with R and one at the camsensorpin).hope someone can shed some light.
    regards
    BMB
    Lock the crank with a locking pin then lock the cam with a lockin pin that will be timed to tdc hope this helps

  3. #3
    REID2168's Avatar
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    i believe its piston number 3 that is to be at TDC top dead center! the cylinder closest to the front of the ski! thats where mine was with the pin in the LOCKED position in the head when i disassembled mine! good luck!

  4. #4
    Site Admin Green Hulk's Avatar
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    Make sure the #3 piston is at top dead center. #3 is the cylinder closest to the front of the ski.

  5. #5
    thanx for all the fast replies,,
    I was talking about the piston closest to the front of the ski: I thought it was number 1. I reckon that they call it in this case #3 piston.
    you are talking about locking the crank and cam.. where are these holes located for putting the lock pin in?
    cheers
    BMB

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