New M42 whine - would love some opinions on what it could be

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  • jsnppp
    Wrencher
    • Jan 2021
    • 254

    #1

    New M42 whine - would love some opinions on what it could be

    Curious what you all think of this whine from my daughter's M42. This is a new sound that appears when it warms up a bit. Changes with RPM, not motion based. Doesn't change with moving the steering wheel. It will go away over time.

    I haven't done a heck of a lot of analysis yet. Car starts, runs fine. I checked belts and none are extrememly loose but I'll take a look. When we refreshed the engine <10k miles ago we did water pump. Can't recall if alternator was replaced (I don't think so)..

    All thoughts welcome!


    1991 BMW 318is - AlpineWeiss II
    1991 BMW 318is - DiamondSchwartz
    1973 BMW 2002 Tii - Baikal
    2002 Toyota 4Runner SR5 sport - Black
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