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Access to timing marks

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mike(Big Irish)Porter, Apr 14, 2023.

  1. Apr 14, 2023 #1
    Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    On a 12.7 Detroit can you access the timing marks on ALL front gears with the front cover on. through the access covers
     
    Mike(Big Irish)Porter, Apr 14, 2023
    Mike(Big Irish)Porter, Apr 14, 2023
    #1
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  3. Apr 14, 2023 #2
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    No. But you can still check timing. Pull #1 injector and set at TDC with a dial indicator. Pull cam gear cover and your cam gear timing mark should be dead center in the gear mesh.

    Why do you ask? If someone is saying they need to pull cover to check, they're FOS
     
    Last edited: Apr 14, 2023
    Big Road Skateboard, Apr 14, 2023
    Big Road Skateboard, Apr 14, 2023
    #2
    Oxbow and Rideandrepair Thank this.
  4. Apr 14, 2023 #3
    Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    Thanks for responding !st the put new cam on new head and the clamed that the timing was off. then they removed the front cover they didn't explain why. I was under the impression that you could access the timing marks on the gear with the cover on .when I asked what he found when he removed the cover he couldn't or wouldnt give me a definitude answer something stinks
     
    Mike(Big Irish)Porter, Apr 14, 2023
    Mike(Big Irish)Porter, Apr 14, 2023
    #3
    Rideandrepair and Big Road Skateboard Thank this.
  5. Apr 14, 2023 #4
    Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    I have no idea what there doing ,when they removed the front cover they said everything was fine !!!!!! 23 hours to remove the cover to tell everything OK
     
    Mike(Big Irish)Porter, Apr 14, 2023
    Mike(Big Irish)Porter, Apr 14, 2023
    #4
    Rideandrepair Thanks this.
  7. Apr 14, 2023 #5
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I was curious after you mentioned tjem saying it was out in the other thread. Sounds like you got shafted. The Detroit manual has a detailed section on timing, and how to check.

    What I mentioned above is how I've done it for years.
     
    Big Road Skateboard, Apr 14, 2023
    Big Road Skateboard, Apr 14, 2023
    #5
    Rideandrepair Thanks this.
  8. Apr 14, 2023 #6
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Why was it in the shop to begin with?
     
    Big Road Skateboard, Apr 14, 2023
    Big Road Skateboard, Apr 14, 2023
    #6
    Rideandrepair Thanks this.
  9. Apr 14, 2023 #7
    Rideandrepair

    Rideandrepair Road Train Member

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    Should have replaced bull gear and front main seal while it was apart.
     
    Rideandrepair, Apr 14, 2023
    Rideandrepair, Apr 14, 2023
    #7
  10. Apr 14, 2023 #8
    Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    what manual are you talking about and can you send me a link i have the 60 ser manuals
     
    Mike(Big Irish)Porter, Apr 14, 2023
    Mike(Big Irish)Porter, Apr 14, 2023
    #8
  11. Apr 14, 2023 #9
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I don't have access to the manual right now. Maybe google cam timing check series 60?
     
    Big Road Skateboard, Apr 14, 2023
    Big Road Skateboard, Apr 14, 2023
    #9
    Oxbow Thanks this.
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