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How many shims......?

Discussion in 'GM 6.5 Diesel Engines' started by doughboy18718, Feb 24, 2009.

  1. doughboy18718

    doughboy18718 Diesel Retard!

    Nov 10, 2008
    The Burg, VA
    How many shims, if any, does the starter need to ensure it doesn't grind the teeth of the flywheel?

    I am currrently in the process of replacing the flywheel because of this same issue, and don't want to go through this hellacious ordeal again!

    Thanks guys!
  2. DEERE3594

    DEERE3594 I welcome everyone...not just Penguins!

    May 5, 2008
    NE Ohio
    Depends on the starter.. some need them and some dont. I always go by how it sounds.. Im no help :(
  3. vail426

    vail426 Member

    May 17, 2008
    Sure you are :iagree:
  4. Brooklyn Tow

    Brooklyn Tow 9 11 Never Forget

    May 6, 2008
    Brooklyn, NY USA
    I "thought" general rule was that these starters "did not" need shims?
  5. jamierayo

    jamierayo Enter Witty Title Here:_____

    Feb 5, 2009
    North Pole, Alaska
    I've changed a few 6.2/6.5 starters & every one of them was marked "no shim" on the starter. I too go by how it sounds & I never heard one grind.
  6. Brooklyn Tow

    Brooklyn Tow 9 11 Never Forget

    May 6, 2008
    Brooklyn, NY USA
    Maybe the "El Cheapo" starters have a problem lining up do to "El Cheapo" product......I would think any quality starter would not need shims. JMO

    Just replaced mine with a Delco and no shims.

    Question...when the starter bolts break/snap due to no front bracket, is it because of the weight of the starter or is it the torque from engagment?
  7. 94K30

    94K30 Diesel nut

    May 9, 2008
    manchester CT
    the torque of the starter motor,
    I too replaced mine, (Bosch rebuild) and no shims....
  8. just a number

    just a number Active Member

    May 26, 2008
    Trenton ON
    No shims here. I think I"m on my 4th rebuild.:mad2:. IIRC the old (looks who's talking) had to be shimmed. Clearances need to be 0.020 +/- 0.005 in. PITA to check. you have to remove to bell housing cover to do it. are the mounting bolts still good? along with the front bracket?
  9. racer55

    racer55 Member

    Jul 12, 2010
    Ontario Canada
    The way I check for starter engagemant if I think I have a problem is to extend the starter drive to make contact with the ring gear and try to fit the end of a paperclip between the top of the drive gear and the bottom of the ring gear where they mesh- the paperclip diameter is approxamatly the proper clearance.

    Like mentioned it is tough to check .
  10. bison

    bison Well-Known Member

    Are you sure you got the correct flywheel/flexplate??
    Gassers ring gears aparently are a wee bit bigger than the diesels.
  11. Steve93mustanglx

    Steve93mustanglx Diesel fanatic!

    Dec 27, 2008
    Midlothian, VA
    no shims here. Replaced last August.
  12. WarWagon

    WarWagon Well it hits on 7 of 8...

    Nov 15, 2009
    Gasser flex plates have a different tooth count and will flat break the starter and throw it clean off the engine.
    Diesel 139 Teeth, 10-12 Pitch
    Gasser 168 Teeth, 12-14 Pitch
  13. ak diesel driver

    ak diesel driver 6.5 driver

    Feb 7, 2009
    there was a thread awhile back where someone had a gasser flywheel on can't remember what it was doing but it didn't break the starter. seems like it was for a 6.5 gasser the ole 396
  14. DieselSlug

    DieselSlug Rust.....What rust....

    Mar 19, 2009
    Fabius, NY
    All the starters ive put on my truck have said "No shim" and trust me, ive been through about 6 starters over the past 5 years.... (No glows for a long time on the ex-powerplant)

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