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Old 01-07-2013, 10:33 PM
bimmerfan52 bimmerfan52 is offline
Officially Welcomed to the 'Fest
Location: Arizona
Join Date: Feb 2012
Posts: 1,253
Mein Auto: 545i
Originally Posted by Stephen Max View Post
This is a bit off topic, but the N62 engine in the 745i has a belt tensioner for the AC belt. The 545i engine has the mounting provisions for the tensioner. I'm wondering why BMW decided to leave it off and if one could be retrofitted.

OP - are you sure you routed the new belt correctly?
Very interesting question. I haven't seen the 745i underneath to compare the two. You would think that with the motors being the same there wouldn't be any drastic differences. I'll check realoem to see if it is a different belt.

And I have often wondered how the 745i alternator fits into the larger engine bay so the oil cooler can be accommodated. That stupid profile gasket under the alternator bracket on the 545i has bruised many a knuckle. I guess they didn't want to change the block casting tool so it could do double duty for both the 545i and 745i, but a solid plug in the 545i block in place of that profile gasket sure would have been nice.
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