how to unbolt alternator - '91 535i - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 07-09-2009, 12:23 AM
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how to unbolt alternator - '91 535i

I have removed two bollts from the alternator on my E34 (1991 535i with E30 motor).

One bolt is at the top and it has a toothed like washernut to secure it to the upper bracket. The other bolt is the long one at the bottom that the alternator pivots on.

I do not see any other bolt but the darn thing won't come out. It's as if the lower pivot bolt was never removed.

I'm afraid to pound on it to loosen it cuz I'd probably break something.

Is there any other bolt or does the lower pivot have a sleeve that also needs removing.

Thanks!
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#2 (permalink) Old 07-09-2009, 11:07 PM
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I got it - just had to really wiggle it and yank on it.
Turns out my alternator is OK afterall.
I had it tested in the car and I was told it was only putting out 30 amps. So I had them order me a new one.

Once I got the alternator out today I thought I should have it tested one more time. The same place tested inside the store and it checked out OK.
So I cancelled my order for the new one. Turns out they ordered the wrong one anyway - they ordered a 115 Amp and the one I pulled out of my car was 140 Amp.
I took it to a 2nd store for another opinion and it checked out OK as well.

Something is drawing current when the car is off, and I thought it might be bad diodes in the alternator. Before I put the alternator back in I tested from the negative terminal to the negative battery clamp - it is drawing over 230mA - it blew the fuse in my multi-meter. I pulled a few relays and I blew another fuse in my multi-meter. So I need to find a multi-meter that can withstand higher mA (mine goes to 200mA) and try to test it again by pulling fuses until it draws less current.
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