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Odd noise at warm idle

Old 04-29-2019, 04:08 PM
Thread Starter
Join Date: Jul 2011
Posts: 32
Default Odd noise at warm idle

When my '81 W123 240D is warmed up and idling there is a intermittent clicking or chirping noise. It's coming from the area near the alternator so I thought that was the problem but I replaced the alternator and I still have the noise. It only happens when the car is well warmed up ,not when it is first started. If I squirt water directly on the belt between the water pump and the alternator the noise stops but comes back as the belt dries off. I replaced the water pump not too long ago. That's the only other thing on that belt. The belt also looks good. Any theories?
Old 04-30-2019, 06:55 PM
Junior Member
Join Date: Oct 2017
Posts: 22

Throw a cooling fan at it too.
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