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Old 04-15-2011, 01:14 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,620
Mein Auto: 02 BMW 525i M54 auto 130K
Here, from underneath, are the tensioners and pulleys for my M54 belt-drive system:
- AAA is towing my car in 30 minutes (total electrical failure)





And, here is the diagram from the Bentleys of the M54 belt-drive system:
- AAA is towing my car in 30 minutes (total electrical failure)


Starting from the crankshaft inner pulley, the larger belt goes counterclockwise to the upper mechanical tensioner, then to the water pump, upside down to the idler roller, and then right-side up to the alternator pulley, and down to the power steering pump pulley at bottom right, and then back to the inner crankshaft pulley at bottom center.

The outer belt goes from the outer crankshaft pulley at bottom center counterclockwise upside down to the lower mechanical tensioner rightside up to the air conditioning compressor and then back to the outer crankshaft pulley.

Last edited by bluebee; 04-15-2011 at 01:19 AM.
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