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Old 06-16-2009, 03:26 PM   #3
Max_VQ
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Join Date: Aug 2007
Location: down by the river
Posts: 335
I am going to assume that the techs have replaced all three idler pulleys and alternator.

It could be:
(1) Water Pump (BTW due to age you should replace rad, thermostat & water pump ASAP)
(2) A/C compressor clutch or bearing (does the noise change if AC is on/off?)
(3) Secondary Air Pump.
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