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      07-23-2019, 10:39 PM   #54
Throatpunch
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Drives: 2008 E93 M3
Join Date: Jun 2010
Location: Philly, PA

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I just finished my alternator replacement. A couple things to add:

Use a long 14mm angled close ended wrench for the belt tensioner and start around the 3 o'clock position and push down. That moved the tensioner much easier than trying from 12 o'clock to 3.

Lining up the bolts with the new alternator was a huge PITA. I used a thick screw driver to get the bottom lined up (moved around which trying to pass through the bolt holes). That helped me stabilize it a bit and I screwed in the top one first then removed screwdriver and screw in bottom bolt.

Lastly when trying to remove the alternator it does not have a bushing like stated above. It has machined edge on the inside and it's just a tight fitting alternator. Best option for me was to use a pry bar between the engine block and the alternator, while wiggling alternator with one hand slightly pry with the other. I didn't need alot of force which was good so I didn't break anything.
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