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Old 05-20-2010, 08:44 PM
scott0357 scott0357 is offline
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Location: SF Bay Area, CA
Join Date: Nov 2006
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Mein Auto: 2003 530i
Originally Posted by bluebee View Post
How does this stethoscope look from Autohauz (since I'm already getting the filters and serpentine belt and maybe the idler pulley)?

The only problem I foresee is that those parts can rip your arm off so I am not sure HOW I'm going to get a stethoscope in there w/o getting coiled up in the belts, rollers, and fan!

PS: I have a friend coming over to help me videotape the noise since I need to rev the engine and film at the same time for that debugging test.

No! You don't put the stethoscope on the spinning pulley, you'll get hurt. Put it on the housing behind or closest non-moving part to the pulley. As you probe around the non-moving parts, the noise gets louder as the stethoscope moves closer to the source of the noise. Assuming the power steering pump pulley or bearing is bad, put the stethoscope on the power steering pump housing (behind the pulley), the noise would be the loudest at that point. As you move the stethoscope away from the PS housing, the noise gets quieter.
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