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Old 02-09-2014, 02:35 PM   #1
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Bad Pulley Help...

I've got a pulley that's making noise and I can't seem to find it. I've replaced an idler pulley that was also making noise and the belt already. I can't seem to figure out which pulley it is though. It only kicks in at around 3k rpms. Other than than it's quiet. I'm just wondering if anyone knows a good way I could troubleshoot and pin-point the sound.
I've already had the belt off so that I could feel the bearings. They all feel fine. Thanks for any input!

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Old 02-10-2014, 05:46 AM   #2
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Are you sure you just didn't getting belt adjusted tight enough. Mine made noise also after replacing idlers. I just had to take slack out of belt. No more than a 1/2 inch of deflection at longest point in belt.

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Old 02-10-2014, 11:38 PM   #3
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Are you sure you just didn't getting belt adjusted tight enough. Mine made noise also after replacing idlers. I just had to take slack out of belt. No more than a 1/2 inch of deflection at longest point in belt.
Yeah I'm sure!
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Old 02-11-2014, 10:06 AM   #4
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I had something similar but after I replaced my radiator this weekend it went away. I'm pretty sure the fan wasn't really tight to the pump so if would make a noise, might wanna check that out even though I doubt that's your issue
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Old 02-12-2014, 03:52 PM   #5
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I had something similar but after I replaced my radiator this weekend it went away. I'm pretty sure the fan wasn't really tight to the pump so if would make a noise, might wanna check that out even though I doubt that's your issue
Thanks, I'll check it out! I'm noticing it making more noise when it's colder out.
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Old 02-12-2014, 05:47 PM   #6
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Check the fan clutch.
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Old 02-12-2014, 09:03 PM   #7
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Check the fan clutch.
Fan doesn't wiggle a bit. ):
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Old 02-12-2014, 09:19 PM   #8
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They don't usually wiggle; they tend to seize up and squeak.
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Old 02-12-2014, 10:39 PM   #9
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They don't usually wiggle; they tend to seize up and squeak.
Alright, I'll check that in the AM. The other fan clutch I had wiggled around loosely so I got a hand-me-down from a buddy about 2 months ago.
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Old 02-13-2014, 01:24 AM   #10
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Mechanics stethoscope. After replacing my idler pulleys, squeaking got worse, determined it was the belt that needed to be moved over two groves on that Pulley with teeth on it, dissapeared
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Old 02-15-2014, 12:49 PM   #11
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use a long screw drive and put it on your altinator ect on a non moveing part and then put your eat on the handle...
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Old 02-15-2014, 07:09 PM   #12
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I found out that it's the belt slipping on the harmonic balancer because of a mystery oil. I just cleaned the balancer and tightened up the belt. Thanks for the suggestions everyone!

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