2008 550i Grind/Power
07-10-2014, 01:23 PM
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My Ride: 2008 BMW 550i
Use a mechanics stethoscope like this one:
Mechanic's Stethoscope
This helped me diagnose a bad water pump among others. I had a tensioner (adjacent to alternator) that squealed so loud, kinda like a horny cat in the middle of the night. Applied some spray lube on it and the noise went away. Good luck.
Mechanic's Stethoscope
This helped me diagnose a bad water pump among others. I had a tensioner (adjacent to alternator) that squealed so loud, kinda like a horny cat in the middle of the night. Applied some spray lube on it and the noise went away. Good luck.
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