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87 K75S radiator fan

The Winter maintenance on my K75S has been like any project I've done on my home; starting a single simple job grows into multiple jobs of increasing difficulty and cost.
Among other things, I found the cooling fan didn't spin freely any more so I removed and disassembled it. After cleaning the shaft and applying generous amounts of oil to the bearings the motor spins freely again. The question is, have any of you revived a fan motor and continued to use it successfully?
I also wonder if there is a better alternative to the stock cooling fan and motor? There are some small fans used for car radiators that look as if they might work, another thought was to use a fan from an electronic device; has anyone done anything like any of these?
 
The Winter maintenance on my K75S has been like any project I've done on my home; starting a single simple job grows into multiple jobs of increasing difficulty and cost.
Among other things, I found the cooling fan didn't spin freely any more so I removed and disassembled it. After cleaning the shaft and applying generous amounts of oil to the bearings the motor spins freely again. The question is, have any of you revived a fan motor and continued to use it successfully?
I also wonder if there is a better alternative to the stock cooling fan and motor? There are some small fans used for car radiators that look as if they might work, another thought was to use a fan from an electronic device; has anyone done anything like any of these?

It is my understanding that motor is manufactured by Bosch and can be purchased for much much less that through BMW. Unfortunately, I can not tell you what the part number is.

Wait for a little while, I am sure someone with more knowledge that myself will post more information.
 
I did exactly as you did "lubed the bearings" and it has been running for a year. It is on a k100/eml sidecar rig so it runs more often then your k75.
 
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