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Old 03-29-2013, 11:02 AM
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JamesDean JamesDean is offline
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
Quote:
Originally Posted by gsxr View Post
The pulleys can be different diameter and different offset. While a sliiiight change in diameter may be ok (the belt tensioner can adjust a little bit), any offset different (front to rear) will make the pulley not line up properly. It's best to use the original pulley that came with that specific year/model/engine. I've always swapped on the original pulley to the "new" alternator, and never had a problem.

I've been using 150A alternators on almost all of my cars for years now. Zero problems.

Right. I think my 190E's alternator pulley has a different offset. You can almost see how its pulling the belt out of line with the rest of the system.

I've been trying to track down a pulley but haven't really tried all that hard so far.
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