Question about 1993 Jeep Grand Cherokee

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Crankshaft pulley (vibration damper) moved forward.

My son was driving my 1993 Jeep Grand Cherokee this morning and the serpentine belt came off. I installed a new belt and it came off immediately when the engine started. I took a closer look and discovered the crankshaft pulley was forward of the other pulleys and idlers by about 3/4" and actually touched the fan. I removed the fan. I turned the engine over with a 3/4" socket and breaker bar. The bolt on the crankshaft pulley is not loose. The engine turns over by hand easily. What could cause the crankshaft pulley to move forward? Could the crankshaft be broken?

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  • novogradac Nov 20, 2008

    Thanks. The six or seven guys at work also had no idea that the pulley could separate from the dampener. Your answer was right on the mark and under five minutes.

  • Rock Martyr Feb 03, 2009

    I have the EXACT same problem. It just happened to me on the way home. What will make the crankshaft pulley move forward like that? The bolt is tight, but the belt is ALMOST off the other pulleys because of the position the crankshaft pully has moved to. It is about 3/4 inch forward, and isn't aligned with the other pulleys anymore. My belts are in good shape, and the Jeep has been driving great until then. Initially I thought that my fan had moved...NOPE. WHat do I need to do to repair this without blowing a ton of money?

  • Rock Martyr Feb 03, 2009

    My bad...mine is a 1996.

  • Anonymous Mar 14, 2014

    How to remove crankshaft pulley on 1988 GMC Sierra 305 engine

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The pulley is also a dampener often times they seperate from each other. replace pulley/dampener.

Posted on Nov 18, 2008

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How to install harmonic balancer


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I need a diagram for the serpentine belt for a 5.2L engine on a 1997 Jeep Grand Cherokee


1997 JEEP GRAND CHEROKEE - V8 5.2L 318ci GAS FI N Y
Usually the label diagram is underhood, over radiator/grille..
.

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If you need more details about youe Jeep ZJ Grand Cherokee, can check this documents about Repair Manual: Grand Cherokee 1993-1998 FSM

To get out, it's easy and doesn't require a prybar.
  • Get a 14mm or 9/16" socket and a long handled ratchet or breaker bar.
  • Get the belt around all the pulleys except the A/C compressor or Alternator.
  • The tensioner pulley is near the Alternator toward the center of the engine. It's on a spring loaded arm. Get your socket on the center nut of this pulley.
  • Slowly pull the ratchet toward the center of the engine. The pulley will pivot on the arm allowing you to get the belt on the final pulley.
  • Slowly release the tension.
  • You're done

Hope helps (remember to rate this answer).

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Hope this helps ya.. Cobra... :-)
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It sounds like a belt problem....but isnt load sensitive right? Yeah....that's what they sound like. Especially the part where they squeal on start up.

Have the tensioner replaced too just in case.

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Serpentine belt


The pulley's aren't supposed to spin freely with the belt on. The belt connects all the pully's to the crankshaft, which does not spin freely because it is attached to the pistons inside the engine. To turn the pulleys, you have to turn the crankshaft, which in turn moves the pistons inside the engine up and down.

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Replacing water pump on a 1993 jeep grand cherokee


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