1998 BMW 316 High pitched whistling sound

1998 BMW 316
71,000 MILES • 4 CYL • 2WD • MANUAL
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KINGSWD
  • MEMBER
  • 1 POST
High pitched whistling sound from engine on run down and idle after about 10 mins running. Not related to motion.
Sep 21, 2008 at 12:17 AM
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DOCHAGERTY
  • ✓Experienced Mechanic
  • 9,606 POSTS
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 6:50 AM
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