auxiliary belt vibration

Simbl · 10-11-2023, 03:15 PM

Having a belt noise. The belt vibrates at idle only, no other noise at any other rpm. When I turn off ac it stops. Ac works fine and makes no noise at any other rpm. I know the belt is old but look okay from what I can see. I don’t have power steering pump.

I’m thinking it’s the tensioner or the belt.

If it was the ac or the vibration damper it would be constant. But I’m not sure.

Has anyone else had this issue.

Video here:https://youtube.com/shorts/fEenR92-Q...AE2ylN1jBiO92c

Simbl · 12-20-2023, 07:59 AM

Anyone that wants to now I replaced the pulley on the alternator and harmonic damper.

10-11-2023, 03:15 PM	#1
Simbl Private First Class 50 Rep 141 Posts Drives: E92 330i Join Date: Jan 2022 Location: London iTrader: (0)	auxiliary belt vibration Having a belt noise. The belt vibrates at idle only, no other noise at any other rpm. When I turn off ac it stops. Ac works fine and makes no noise at any other rpm. I know the belt is old but look okay from what I can see. I don’t have power steering pump. I’m thinking it’s the tensioner or the belt. If it was the ac or the vibration damper it would be constant. But I’m not sure. Has anyone else had this issue. Video here:https://youtube.com/shorts/fEenR92-Q...AE2ylN1jBiO92c
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12-20-2023, 07:59 AM	#2
Simbl Private First Class 50 Rep 141 Posts Drives: E92 330i Join Date: Jan 2022 Location: London iTrader: (0)	Anyone that wants to now I replaced the pulley on the alternator and harmonic damper.
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