BMW Luxury Touring Community banner
1 - 2 of 2 Posts

·
Registered
Joined
·
4,612 Posts
Without doing a crown bearing replacement and setting it up properly from scratch, the next best thing you can do is keep an eye on the magnet. The FD holds a small amount of oil so checking it a couple times a year is not expensive and if you are fast enough, you can get the magnet out and put your finger over the hole to have a look and not lose too much. Order a stash of crush washers for your tool box. Some reuse them if they are not overly distorted but best to just replace it. A fine paste on the magnet is OK but if you start seeing stuff floating in the oil ( non ferrous ) or more than a fine powder on the magnet, then it very likely would need a closer inspection and rebuild before a total failure of the bearing happens. You can do the wiggle test ( not conclusive ) on the rear wheel. Any play side to side or top to bottom is not good. If you do find play, you need to discern if it is coming from the crown bearing or is it the FD and or the swing arm pivot bearings that are loose allowing that entire section to wiggle.

There is much more to a FD than just replacing the crown bearing and main seal but with doing nothing else, you should expect to hopefully see a similar mileage before the next failure keeping in mind that you did not remedy the issue that caused the failure which would likely be over shimming causing metal fatigue and bearing failure.
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top