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Old 01-22-2002, 01:16 AM
crichardson crichardson is offline
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Join Date: Jan 2002
Location: Sacramento, CA
Posts: 5
AIR (smog) pump noise

My air pump is making a screeching noise at certain rpm's; 1200, 1600, 1900, etc. It's not belt slippage.

I took it to my mechanic today and he thinks the clutch in the pump is not totally disengaging and internal frictions may be causing the sound. He thought I would just have to wait until it got bad enough to have to replace.

I know these are very pricy, $800 new. Is there any way to repair the pump or should I start looking for a used one?
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