1998 BMW 316 High pitched whistling sound

1998 BMW 316
71,000 MILES • 4 CYL • 2WD • MANUAL
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KINGSWD
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High pitched whistling sound from engine on run down and idle after about 10 mins running. Not related to motion.
Sep 21, 2008 at 7:17 AM
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DOCHAGERTY
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It could possibly be an idler pulley or the alternator or water pump, it is extremely difficult to properly diagnose noises from cyberspace.
Sep 21, 2008 at 1:50 PM