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-   -   What's wrong (http://forum.e46fanatics.com/showthread.php?t=945539)

Hbenmeir 09-19-2012 01:18 PM

What's wrong
My car is making a really high pitch wine when I first start it in the morning. Then it does it between 15-2500 rpm while driving now most of the time. It started doing it bad when I left one morning and it was 40 degrees out. It would do every once in a while before, only on first start of day then stop. Could this be a belt of some sort or perhaps alternator.

El Polo 09-19-2012 01:25 PM

Secondary air pump?

Sorry if this post doesn't make sense. I am writing on a cell phone.

Hbenmeir 09-19-2012 09:11 PM

Were and what is that never heard of that before. BMW thing.

Drewfus2101 09-20-2012 08:23 AM

It is probably a pulley making noise. When the bearing are going out, they squeal when they are cold but don't when they warm up.

Hbenmeir 09-20-2012 01:22 PM

It's coming from the driver side so would probable be safe to say alternator. I do live on a dirt roAd.

Beamer Creamer 09-30-2012 11:42 PM

Dont waste money guessing and replacing. You can get a cheap stethescope and use open tube to listen to each pulley/idler. I know its old school but still best. Or some idlers you can use probe attachment and touch on unmoving parts should hear if its rough

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