Click Click Boom!!!!!

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Goodysnap, May 14, 2020.

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  1. KVB

    KVB Heavy Load Member

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    upload_2020-5-19_5-49-52.png

    I don't know the history of this. I saw it at the truck shop where I go for dyno testing.
     
    KVB, May 18, 2020
    #91
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  2. pushbroom

    pushbroom Road Train Member

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    Just in case anyone didnt notice it on @KVB s post.... paccar doesnt use any counterweights on the crank.
     
    pushbroom, May 19, 2020
    #92
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  3. Shawn2130

    Shawn2130 Heavy Load Member

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    Pushbroom: Is there a reason for no counter weights? Pistons must be featherweight?
     
    Shawn2130, May 19, 2020
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  4. pushbroom

    pushbroom Road Train Member

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    Less rotating mass. Flywheel is a bit heavier to make up for it. Paccars rev quick because of it
     
    pushbroom, May 19, 2020
    #94
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  5. FoolsErrand

    FoolsErrand Road Train Member

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    Hmmm.

    Im not sure how to feel about that.
     
    FoolsErrand, May 19, 2020
    #95
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  6. Shawn2130

    Shawn2130 Heavy Load Member

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    I thought the purpose of the counterweight is to offset the weight of the swinging rods and up and down motion of the pistons?
     
    Shawn2130, May 19, 2020
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  7. pushbroom

    pushbroom Road Train Member

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    Well considering they have been doing it for quite a while with no issues.....
    More then one way to skin a cat.

    If you really wanna get worked up the new camshafts are hollow tubes with pressed on lobes:)
     
    pushbroom, May 19, 2020
    #97
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  8. pushbroom

    pushbroom Road Train Member

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    20170303_131541.jpg
    SDP that had a recent rebuild. Determined there was an abnormally in the rod which fractured in two starting from the oil feed hole. New long block and back together.
     
    pushbroom, May 19, 2020
    #98
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  9. spsauerland

    spsauerland Road Train Member

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    S
    Seeing many cam failures up your neck of the woods on the EPA 17 MX13? Seems like ones I have heard are mainly the brown package haulers that run long oil drain intervals. Lower oil pressure and increase oil temp was bound to give issues. Glad to see with oil filter cap campaign includes a lower temp oil thermostat.
     
    spsauerland, May 19, 2020
    #99
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  10. pushbroom

    pushbroom Road Train Member

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    None at my branch, we also preach shorter oil drain times then the reccomended( which I think are crazy)
    I think we had a few at some of our other locations. Not really as big of a deal as it first was led to be.
     
    pushbroom, May 19, 2020
    #100
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