1st Gear Member
Join Date: Jan 2005
Location: Clemson, South Carolina
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It could be a failing belt tensioner, im sure uve replaced the belt, but what about the tensioner arm itself?
Also, if not the alternator, check for corroded, loose wires. On back of alternator and battery.
And if battery is old, it wont hold charge any more, since it gets to a point of saturation, this is for real..
Anyway, if you replaced brushes and coltage regulator less than a year ago with BMW original parts, my guess is that you have some dirty, corroded wires somewhere.
If you used aftermarket parts, let me warn you, they are cheap, but they break way sooooooner too.
So put the voltmeter with the car idling, you should get something close to 14v, not above, high 13 to tops 14 volts. But even if you get a voltage reading, that wont indicate amperage flow. This means that if you have a loose, dirty, corroded wire, you will get some energy flow, therefore the voltage reading, but not all the flow, meaning, not all the amps, so you have a problem on the charging system..
Check that,. im pretty sure is something dumm..
let us know
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