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lock up

Discussion in 'XJ Technical Chat' started by 82seca750, Jan 16, 2009.

  1. 82seca750

    82seca750 Member

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    i just got done puting in new stater and i rode home got done with lunch and the engine locked up on me 8O :( . do any of you guys know ruoghly how much it would but to rebuild engine
     
  2. wizard

    wizard Active Member

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    Way cheaper to find another running motor.
     
  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    very true. However you might want to take your diagnosis a bit further?
     
  4. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Was it making any weird noise?
     
  5. Robert

    Robert Active Member

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    Jinkies 82, what a lousy way to end the day! We need a damage report. Pull plugs and investigate straight away.
     
  6. 82seca750

    82seca750 Member

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    pulled vavle cover and the timing chain is so tight it looks like it is about to shatter the teisnoner is all the way off. do any of yall know where i can get a timing chain
     
  7. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    The timing chain should "LOOK" tight when you look at it up top.

    You're going to need to do some logical troubleshooting to determine the cause of your problem, guessing will only get expensive and not solve anything.

    The first thing I would do (ok second since the valve cover is off) would be to pull the ignition cover and turn the motor over by hand to determine exactly what the source of the problem is. Pull the plugs, let's figure out WHY the motor is "locked up" if it truly is.
     
  8. 82seca750

    82seca750 Member

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    ok pulled the head off and everything top side looks good. i am thinking maybe the gear on the crank snaped a tooth becuase now the cams are off the bottm end turns freely.
     
  9. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    I dunno... LOOK in there you should be able to see that. I can't fathom how a chipped tooth on the crank sprocket could lock the motor. You sure you didn't spit a shim or something?
     
  10. 82seca750

    82seca750 Member

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    thinkin it jumped time vavle hit piston but there is not any signs of the piston being hit?
     
  11. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Is there a chipped tooth or isn't there? If it TOTALLY "jumped" then I suppose it's possible it caused it to lock up but I think you need to more closely examine everything.
     
  12. sushi_biker

    sushi_biker Member

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    If you think a valve hit a piston and got bent, you should be able to see them seat in the cylinder head. It will be obvious if it doesn't sit right.
     
  13. Robert

    Robert Active Member

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    If the bottom end turns freely after you release the cam chain, can you turn the cams using the cast in flats near the center of the cam shaft?
    I would doubt you have a gear issue if you can turn the lower end freely.
     
  14. 82seca750

    82seca750 Member

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    robert r u saying that the head mit be the proplem





    no chipped teeth
     
  15. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    He's saying something in the head MIGHT be or have been the problem.

    If you spit a shim it could lock the top end, but I would think it would cause visible destruction.

    Now that everything's taken apart, you might have missed the issue.
     
  16. Danilo

    Danilo Member

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    basic rule of mechanical thumbs :)
    ALWAYS check the last thing you fooled with.
    Likey your stator got loose??
     
  17. Robert

    Robert Active Member

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    I would suggest you find out what components you have that can move and what can't.
    Crank: Check, it moves. This indicates that the pistons and rings aren't melted together.
    Cams: ???
    You should be able to rotate the cam with a wrench with moderate effort. If you are fighting it with head removed, you have a problem.
    At this point it is vital to determine what is locked up on the engine.
    Let us know what you find please.
     
  18. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    I think he already pulled the head and the bottom end is free and there is no chipped tooth on the crankshaft camchain sprocket.

    Did you pull the cams or are they still in the head? If they're still in the head can you use the big hex on them and turn them as Robert suggested?

    Is it possible as just suggested that this relates back to the repair you just performed and something came loose, jammed, and isn't jammed now?
     
  19. 82seca750

    82seca750 Member

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    could my stater really cause it to stop. because i just replaced my stater?


    the head is fine i am sending it in to have a vavle job
     

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