bearing noise

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The following is not a model-specific question. On an engine with the below-listed accessory belt driven components, which bearing, going bad, is most likely to be noisy upon start-up only to quiet down after a few minutes with the engine running?


belt tensioner
idler roller
water pump
power steering pump
A/C compressor
alternator
 
As mentioned, alt. Rebuilding your own is not terribly hard or pricey if you have a workbench and some basic skills.

To neck it down, though, get a very large flat bladed screwdriver and put the blade on the various components. Put the handle against your ear and you will tell quickly which is the offending piece. It’s a very effective impromptu stethoscope if you do not have one.
 
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