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Discussion Starter · #1 ·
2003 Highlander 4 cyl 90 K miles
I have a noise that that is not constant and is coming from the left side
either alternator, water pump, idler pulley. It is more noticable at idle and
when I use a stethoscope I can hear it from the idler, alternator and
brackets but can't quite narrow it down. Its a rattle that comes and goes.

Any ideas on how to track it down? I sure don't want to replace a good
alternator.
 
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