Question about BMW Cars & Trucks
There is a noise near the a/c compressor when the engine is running and the mechanic suggested that I replace it. Even though the AC is off it still makes a noise. I posted a video for more info on the sound. https://www.youtube.com/watch?v=8K6XZPrCBg4
If you hear this noise all the time, then it is probably the a/c clutch bearing, which will have to be replaced. More than likely, by the time you pay for the parts and labor to install the bearing it may be cheaper to replace the whole compressor.
Posted on Nov 17, 2013
Testimonial: "So even though the ac compressor isn't broken it's just the bearing that comes with the kit? Awesome. Did you listen to the sound though because it's actually quite unique in comparison to other sounds that other people notice."
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Posted on Jan 02, 2017
This is normal, the compressor is spun by the fan belt, and when everything equalizes the pulley stops moving. This repeats over and over again.
Posted on Aug 10, 2008
buy yourself a remanufactured A/C compressor, as you need specialized tools to rebuild and old compressor as well as the seals.
Posted on Apr 01, 2009
It's the clutch or compressor or the idle pulley for the belt for the AC to check it have someone start it with the hood open and use a broom handle pressed to your ear and put the end of the broom near the ac compressor and turn it on and see if you here it there then shut it off and check near the idler pulley to see if it's there. The stick acts like a doctors stethoscope and amplifies the noise and will allow you to pinpoint the noise more accurately. If it is the clutch it can be replaced without replacingthe whole compressor but you will have to buy it at JC Whitney on line. Many who sell them charge as much as the compressor assembly costs.
Posted on Jul 15, 2009
I had the same issue with my 2006. I thought the compressor clutch bearings were faulty. After further research, the rattling noise was actually coming from the serpentine belt tensioner. Easy repair!
Hope this helps.
Posted on Feb 01, 2010
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