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04 WS with 14L Detroit wrist pin slack

Discussion in 'Trucks [ Eighteen Wheelers ]' started by cpayne54, Jan 2, 2014.

  1. Jan 2, 2014 #1
    cpayne54

    cpayne54 Bobtail Member

    4
    0
    Mar 4, 2013
    Paris, Tx
    0
    I have an 04 Western Star with a 14L Detroit that is getting overhauled. We have new pistons rods and wrist pins. When you put the piston assembly together, you can put the rod in a vise and grab the piston skirt directly under the wrist pin holes and there is a little bit of up and down slack. Is this normal? This is my first dealing with a Detroit so im not familiar and I cant get any help from technicians locally. Thanks
     
    cpayne54, Jan 2, 2014
    cpayne54, Jan 2, 2014
    #1
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  3. Jan 2, 2014 #2
    truckman29801

    truckman29801 Medium Load Member

    469
    109
    Mar 10, 2013
    SC
    0
    I would think that slack would turn into a knock if you put it in like that
     
    truckman29801, Jan 2, 2014
    truckman29801, Jan 2, 2014
    #2
  4. Jan 2, 2014 #3
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,203
    Jan 7, 2013
    0
    A little play is normal (about 0.002-0.003"), but I cannot tell if what you have is too much or not, measure to be safe. The piston pin bore should be 55.05 mm (2.1673") - 55.065 mm (2.1679") measure both ends horizontal and vertical. The pin diameter should be 54.992 mm (2.165") - 55.0 mm (2.1653).
     
    GrapeApe, Jan 2, 2014
    GrapeApe, Jan 2, 2014
    #3
    cpayne54 Thanks this.
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