Question HPOP Gear Lash - Too TIGHT??

Discussion in '6.0L PowerStroke Engine & Drivetrain' started by VinceJE, Jan 28, 2018.

  1. VinceJE

    VinceJE Full Access Member

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    2004 6.0 F350
    185k miles

    Does anyone here have experience with this? Am I being paranoid?

    I'm replacing the original HPOP with one of the Diesel Site pumps purchased directly from them. It mounts up perfect with no issue. The gears also seem to mesh perfect, but maybe too perfect -- meaning there is no lash/play. I'm concerned that there should be a small amount if lash. All-Data spec is 0.007-0.0124. I've talked to Diesel Site a few times and they are adamant that this has never been a problem, but I'm worried that such a tight fit will destroy the drive gear. I've done alot of forum reading and can only find a couple posts that touch on the subject and those posts were concerned about the gear lash being too much.. not too little. Conventional knowledge is that there needs to be a small amount of lash. Otherwise, the gears bind, can't lubricate, & grind. The last thing I want is to damage the cam/drive gear.

    Thanks for any feedback y'all can give!!
     
  2. JLDickmon

    JLDickmon ursus combibo

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    Just because you can't feel any lash doesn't mean it's not there. .007 is only about two sheets of notebook paper thick.

    If it really concerns you, maybe figure out some way to slip a hunk of Plasti-gage in there when you mock it up.
     
  3. john mathis

    john mathis SDD Junior Member

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    running a new gear (new pump), up against a slightly warn gear( in the motor) may seem tight but shouldn't cause any problems. They will wear into each other just fine.
     

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