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3,093 Posts
2002 K1200 LT 52,385 Miles.
Existing crownwheel bearing shim thickness was 0.60mm
New bearing measured for 0.40mm suggesting that the original bearing was overshimmed by 0.20mm. This finding is consistent with previous data suggesting the excess preload is related to crownwheel bearing failure.
The bearing retainer was found to be broken on opening the drive. Cutting open the bearing reveals advanced pitting of both inner and outer races.
I pretty sure that this FD had been rebuild before. The crowngear assembly had been engraved with the number "5". This is not a BMW marking. I've engraved FDs that I have rebuilt in the past so I could identify the FD as one of my rebuilds if the FD ever came back to me. This is not my marking, I wonder if anyone recognizes it?
Existing crownwheel bearing shim thickness was 0.60mm
New bearing measured for 0.40mm suggesting that the original bearing was overshimmed by 0.20mm. This finding is consistent with previous data suggesting the excess preload is related to crownwheel bearing failure.
The bearing retainer was found to be broken on opening the drive. Cutting open the bearing reveals advanced pitting of both inner and outer races.
I pretty sure that this FD had been rebuild before. The crowngear assembly had been engraved with the number "5". This is not a BMW marking. I've engraved FDs that I have rebuilt in the past so I could identify the FD as one of my rebuilds if the FD ever came back to me. This is not my marking, I wonder if anyone recognizes it?
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