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oops crank damage?

Discussion in 'Early CJ5 and CJ6 Tech' started by nyejos11, Feb 28, 2006.

  1. Feb 28, 2006
    nyejos11

    nyejos11 Member

    Emmaus, PA
    Joined:
    Dec 17, 2003
    Messages:
    384
    I accidentally dropped my 225 crank on the concrete from about 2 1/2 feet. It pretty much landed flat across several beefy counter weights. Do you think it is OK? I think with the beefyness built into this thing that it is prolly OK. I'll have it checked for cracks.

    Josh
     
    nyejos11, Feb 28, 2006
    #1
  2. Feb 28, 2006
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    I don't think cracks would be so worrysome as bending. The books say you should always stand a crank on end, and tie it up so it won't fall over... I thought both standing on end and not falling over was because it might get bent. You can make a rough check for runout by putting it in the block without the rear main seal and seeing if it spins freely. You could also plastigage at different rotations.
     
    timgr, Feb 28, 2006
    #2
  3. Feb 28, 2006
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sep 22, 2002
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    8,360
    It's fine... If it landed on the counter weights and didn't damage any of the machined journals.... If it won't withstand that, I wouldn't expect it to hold up to the forces and thermals of normal use...
     
    Patrick, Feb 28, 2006
    #3
  4. Mar 1, 2006
    181jeep

    181jeep Banned

    central valley, ca
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    Feb 3, 2004
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    x2 what patrick said.

    JB
     
    181jeep, Mar 1, 2006
    #4
  5. Mar 1, 2006
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Mar 4, 2003
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    Did you check the floor for cracks?
     
    Warloch, Mar 1, 2006
    #5
  6. Mar 1, 2006
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Nov 6, 2002
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    4,275
    x2. Might have to have the garage floor magnafluxed to check for cracks.... <kidding> R)
     
    w3srl, Mar 1, 2006
    #6
  7. Mar 1, 2006
    nyejos11

    nyejos11 Member

    Emmaus, PA
    Joined:
    Dec 17, 2003
    Messages:
    384
    I have a feeling the crank won this round. It blew out a chunk of concrete about 3 inches across and prolly 3/8-1/2 inch deep! Beefy huh?

    Josh
     
    nyejos11, Mar 1, 2006
    #7
  8. Mar 1, 2006
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Mar 4, 2003
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    My foot says it's not surprised... Been there, felt that, got the bruse.
     
    Warloch, Mar 1, 2006
    #8
  9. Mar 1, 2006
    Hippo393

    Hippo393 Jeepless

    Charlotte, NC
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    Chuck...your foot?? :shock: Ouch!!

    Bet it made ya feel a bit 'cranky'. :D
     
    Hippo393, Mar 1, 2006
    #9
  10. Mar 1, 2006
    michigan_pinstripes

    michigan_pinstripes I'm not lost, I'm wandering

    Clarkston MI...
    Joined:
    Aug 20, 2003
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    605
    IIWM, I would not hesitate to chalk up the oops as a bad experience and take it to the machine shop (unless it landed 'zactly flat which is nearly impossible). That's just me but I spent a short tour of duty in the engine remanufacturing industry and a loose crank bends relatively easy. If that kind of drop happened out in the plant, it would definately go back to the balancing jig or to the scrap bin.

    Not to scare you, but be cautious. Yours should be 100% fixable.
     
    michigan_pinstripes, Mar 1, 2006
    #10
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