9. We went on and removed small bolts from front alu plate to allow us to lift the front part of the motor from the rest of the casing.
To my surprise the whole cooling channel will lift together with the front plate!!!
10. Then i took the motor home to pry the bearings off. I first removed the front bearing. It had considerable play. To my surprise the front casing had a loose fit for the bearing with a spring plate to prevent bearing flutter.
Then i removed the resolver and its core to get access to press out the rear bearing. CAUTION! When you remove the resolver winding you absolutely need to mark the position of resolver core. The core is mounted on its own steel bushing that needs to be marked against the main shaft as well.
If you dont mark relative position then you may expect this result:
https://evclinic.eu/2024/10/27/huston-w ... th-bmw-i3/
Then we went to the press to get the rear bearing off... carefully
Secure all hardware. When removing the rotor you need to treat it with care as it is a giant magnet and can pick up metal shavings which can cause headaches later...
Then i used press to remount new bearings in reverse order of dissassembly. I took great case to correctly fit the resolver core.
Also when reinstalling the motor to gearbox take great care when packing the grease. I put it inside the splines not on the gearbox side as i noted there is another small O-ring there which obviously prevents grease to slide past the shaft and could damage motor internals. The small packing of grease is quite enough to lubricate the motor joint.
The hardware needed to replace the bearings:
Front bearing 6306-2RZ/C3GJN 30x72x19mm SKF Deep Groove Ball Bearing
Rear bearing 6006 2RZ Deep Groove Ball Bearing SKF
2x motor O - rings 245 x 5mm NBR70
Also consumables that i consider a must:
Nicro 636 sticky grease for O-ring fitting and final assembly, it is also good to stick washers and other hardware for off hand assembly
Spline grease 5g for gearbox motor junction which is not internally lubricated: GE 83232357146
Gearbox oil 0.5L: Hypoid axle oil G3 P/N 83222413512
BMW coolant: LC87 blue P/N 8351A6CDD7