2000 Pontiac Montana crankshaft pulley

2000 PONTIAC MONTANA
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EMPIRE490
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Engine Mechanical problem
2000 Pontiac Montana Two Wheel Drive Automatic 147000 miles

My serpitine belt came off.I put on new one and when I started it up the belt came off.I noticed when I went to put belt back on that the crankshaft pulley is not inline with the rest of the pullies alt,aipower steering.What would cause this to happen?
May 12, 2009 at 8:07 PM
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KEITHANDBEV
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I have just experienced the same thing today...........any ideas anybody
Jan 24, 2012 at 8:27 AM
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RASMATAZ
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You crankshaft pulley could be loose try torquing it to specs and inspect the other pulleys double check belt tracking/alignment
Jan 24, 2012 at 9:06 AM
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KEITHANDBEV
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In another forum I found many Montana's where the Harmonic Balancer has come apart which is causing the pully to be 1/2" out of alignement so I will check this now..........thanks everybody.
Jan 24, 2012 at 9:12 AM
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MATTF6
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What were the results? I have a similar issue with the same year/make/model.

Thanks for any info.
Aug 16, 2013 at 6:26 PM
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DKROESE
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I had the same problem and the harmonic balancer (102K miles)had actually started to separate and caused the pulley to move forward. Oriellys to my surprise had it in stock so I suppose it is a common problem. At the same time I found everyone of the idlers/bearings(there are a few) were wore out so I replaced them
Aug 17, 2013 at 11:17 AM