Remove the serpentine belt and spin the idler and tension pulleys by hand. If they are loose or have a grit-like feel to them, they need to be replaced.
Then do the same for each of the accessory components (alternator, power steering pump, water pump, a/c compressor). They should spin freely, smoothly, and quietly.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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