mack running bad

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Ezrider_48501, May 29, 2017.

  1. Ezrider_48501

    Ezrider_48501 Road Train Member

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    i hope im not in that club i guess we will find out though,

    its a 2000 e-7 460
     
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  3. AModelCat

    AModelCat Road Train Member

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    I'm definitely not a Mack guy by any means but some of the old gensets I work on have cam driven unit pumps. When the pumps on those wear out they start to pump fuel into the oil. Yours isn't making oil is it?
     
  4. Ezrider_48501

    Ezrider_48501 Road Train Member

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    oil seems to be consistent with normal. added 1.5 gallons of oil on my last oil change 19k miles, only a couple thousand miles sense i changed it still right on the full mark.

    i did send in a oil sample with my oil change, have not got the results back yet. i wish i had it would probably give me a better idea of what is going on.

    i was just doing some searching and reading online on cam failures on the 99-03 e-7's, and its not looking good for the cam, apparently somewhat normal for the front cam bearing to go out first resulting in a oil psi loss and pedigree mentions eating injector lobes from the front to the back. might not be looking good for the cam
     
  5. Ezrider_48501

    Ezrider_48501 Road Train Member

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    i tried this my results were inconclusive, within 20* on all could make a 40 degree difference on where exactly you pointed the thermo on the manifold the 1 and 6 were the coldest, witch makes sense, the idle has a pretty good lope to it. tried listing closely to see if i could tell where the miss was front/middle back and couldn't really tell although it seems there is more clatter comming from the front
     
  6. Cat sdp

    Cat sdp . .

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    You got a good Mack shop near you...?
     
  7. Ezrider_48501

    Ezrider_48501 Road Train Member

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    i have a Mack dealer about 5 miles from my house, don't know how good there shop is never had to take anything to there shop before but there parts department is pretty good and they know me there.
     
  8. Pedigreed Bulldog

    Pedigreed Bulldog Road Train Member

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    I'd either ask them or the guys on bmt.
     
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  9. Ezrider_48501

    Ezrider_48501 Road Train Member

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    yeah iv had a thread up on bmt for about a week now, with no real input.

    im probably going to see if they can get my truck in at Mack sometime here pretty quick and let them look at it, i hate to do that, but i don't want to keep running it as it is.
     
  10. Pedigreed Bulldog

    Pedigreed Bulldog Road Train Member

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    Problems don't typically resolve themselves...usually you either fix them or they blow up in your face at the worst possible time.
     
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  11. Ezrider_48501

    Ezrider_48501 Road Train Member

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    no not typically, i wish i could diagnose and fix it myself, if i felt confident it was a Jake or a injector issue i would dig into it myself, if it is a cam issue it would likely end up at Mack for that anyway, im sure i could do a cam job myself on it, if i had to but there is a lot of mass to that cam, not like shoving a cam in a 350 chevy seems you would almost need to rig some kind of holding device to help you hold it as you guide it in, i would be afraid of gouging up the cam bearings trying to manhandle the thing in there.
     
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