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Old 04-13-2013, 09:51 AM   #1
galileofigaro
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Drive belt derailing. See video

I installed this in the past but in this case it derails as soon as I turn the ignition on.
http://www.youtube.com/watch?v=NSlX5...ature=youtu.be
Help!
Thanks


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Old 04-13-2013, 01:56 PM   #2
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a pulley inst aligned somewhere, did you change anything when you put it on?
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Old 04-13-2013, 02:43 PM   #3
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what's pulley inst?
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Old 04-13-2013, 02:49 PM   #4
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He almost said "a pulley isn't aligned somewhere" and it's probably the place to start. Have you changed anything on the side of the engine recently that might have thrown belt alignment out of whack at all?
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Old 04-13-2013, 05:00 PM   #5
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You're not putting belt on right or something worn to droop or out of flat plane with the belt run, simple as that. If a flat pulley that runs on backside of belt, putting it out of line there will have the bumpout run through the line trying to derail at every pulley until it straightens out.
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Old 04-13-2013, 06:38 PM   #6
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I went through 3 Auto Zone Duralast tensioners before I said F it and ordered a Gates from Rock auto. Have not had the belt come of since!
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Old 04-13-2013, 09:54 PM   #7
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Looking from above the only misaligned crank pulley is the compressor's. That's why the belt derails.
One of the compressor's bolt that attaches it to the engine was loose. Tightened it but same thing. Another thing, if you check the video the compressor is leaking AC fluid.
I also haven't had any collision or going over a rock (e.g) that may have caused that misalignment.
I'm planning to get an idler pulley, which is the adjacent to the compressor. If you follow the belt's direction, the idler pulley is right before the compressor. But I don't think the idler pulley is the problem because doesn't move abnormally, there's no play when turning, looks normal.
A temporary solution: I removed an entire groove along the drive belt. No more derailing. For now.
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Old 04-14-2013, 04:14 AM   #8
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I actually did that once for a guy with a T-Bird, for some reason a mech put his stuff back together wrong and one unit was out of line. Used a razor blade to remove one groove worth and car ran happily for years after like that. It CAN work.
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Old 07-03-2013, 01:05 AM   #9
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The cause of misalignment was actually a faulty A/C compressor.
One day I was just arriving home when smoke came from the engine, actually from the drive belt that got stuck and caught fire. I ran home to get a fire extinguisher and put it out. Next day the mechanic told me I needed a new A/C compressor. All is Ok now, just had to pay a few hundreds, but you know A/C issues like this costs like that. Anyway, a problem that begun 2 years ago ended up well and without a car on fire.
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