X15 cam failure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by calvinbabb, Jun 3, 2023.

  1. calvinbabb

    calvinbabb Light Load Member

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    I have a Cummins x15 economy. Two cam lobes are bad and of course, 2 rocker arms. Manufacturing date on engine is 04/2017. Engine has 645xxx miles. I’ve owned for 100k of those. Kenworth is stating engine rebuild, but for a cam failure? The cam isn’t that bad so can’t see rebuilding the engine. In a mechanics point of view, what else should be changed to run this engine? Can’t help but think the dealer is trying the leach me.
     
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  3. Goodysnap

    Goodysnap Road Train Member

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    That’s because you’ll be really mad when it starts pushing coolant due to a dropped liner 2 months after you put a cam in it.

    Are the front a rear housings leaking yet?

    You already know it hasn’t had regular maintenance with the worn camshaft.
     
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  4. little cat 500

    little cat 500 Road Train Member

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    id just do the cam and ride
     
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  5. D.Tibbitt

    D.Tibbitt Road Train Member

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    What were your symptoms that led to finding a bad cam?
     
  6. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    I usually blame those failures due to lack of valve adjustments. I have a ISX 15 and run through the adjustments yearly regardless of mileage. Just my .02
     
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  7. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Slow week at that stealership.
     
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  8. Jubal Early Times

    Jubal Early Times Road Train Member

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    Where did all this cam material go? What did it pass through on it’s way?
     
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  9. calvinbabb

    calvinbabb Light Load Member

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    Apr 28, 2016
    Trenton, Fl.
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    .
     
    Last edited: Jun 4, 2023
  10. calvinbabb

    calvinbabb Light Load Member

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    Apr 28, 2016
    Trenton, Fl.
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    I’ve only had it a year and about 10 months on the adjustment
     
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  11. calvinbabb

    calvinbabb Light Load Member

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    Apr 28, 2016
    Trenton, Fl.
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    Started hearing a rocker arm tick. Still ran fine and was still averaging 8.4 mpg. But I did run it about 2400 miles like that.
     
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