Pulleys
08-19-2016, 04:54 AM
#2
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Location: Lebanon
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My Ride: 2007 BMW 550i
Its most probably something on your belt. Spinning freely isn't enough. The bearing that make that sound are what you want to hear for. You can test this with your car running without a belt for a couple seconds to make sure its something on the belt then you can install the belt and use a tool that looks a lot like what doctors use to hear your heartbeat except the part that amplifies the sound is thin and for automotive use.
08-19-2016, 06:07 AM
#3
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My Ride: 08 535i
08-19-2016, 06:37 AM
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My Ride: BMW 530xiT (E61)
Model Year: 2007
definitely sounds like a pulley bearing to me.
an automotive stethoscope would work, but be careful using something like that with a moving belt
08-19-2016, 06:34 PM
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My Ride: 08 535i
Update on the Car. Took both belts off and played with the pulleys a bit. What pulleys do you guys think are bad? I'm pretty sure the AC Comp. isn't supposed to Sqeak like that��