Rotating the cam gear on a small cam Cummins

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mile marker 27, Jun 25, 2022.

  1. mile marker 27

    mile marker 27 Medium Load Member

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    Ok it’s been a a while but I finally got an in frame kit(CPL 160) for the small cam Cummins. Completely tore apart, with cam removed so that the timing can be changed. Going from 217(290hp) to 160(350hp). What’s the best way to remove the gear from the cam and is there any way I should mark the existing location? I’ve mentioned a new cam key to my local Cummins and these guys are absolutely no help. I’ve not got the CPL manual with me at the moment but I think, I’m going from -.50 to -.35.
     
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  3. RocketScott

    RocketScott Medium Load Member

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    20 ton shop press
    It goes off like a gun shot. To put it back on heat the gear in the oven at 500 for an hour and it will drop back on
    Don't really need to mark it. Just make sure it's not reversed when it goes back on
    The CPL book should give you a part number for the new cam key
     
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  4. Inderjit

    Inderjit Medium Load Member

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    I used time small cam 350 Cummins engine at .041" they started better with
    less smoke at cold start up. Do you have access to a timing tool?
     
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  5. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    Press as RocketScott said, then warm it up in the oven so it’s even temperature all over. Have your cam secured and shove it in place, make sure not to pull on it till it’s cooled down.

    Make sure you have your key in place….
     
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  6. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    Not sure I have the info you need on the timing but I will look in my Cummins book….
     
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  7. mile marker 27

    mile marker 27 Medium Load Member

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    I don’t have a timing tool and not sure if any of the near death mechanics, that are old Cummins guys, have one either.
     
  8. Inderjit

    Inderjit Medium Load Member

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    I could probably be done with two mag base dial indicators.
    One directly on the piston and the other in the injector push tube.
     
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