1973 R75/5 Rebuild: Remove/Install Flywheel, Replace Rear Main Seal, Oil Pump Cover and O-ring

I posted a new page on removing the flywheel, replacing the rear main seal, oil pump cover and cover o-ring and installing the flywheel. This also covers a repair to a leak I found in one of the crankshaft flywheel bolt holes.

The work I did was guided by a lot of advice and web content shared by others who have gone before me.  I’d like to acknowledge folks who regularly participate on the BMW Airhead forum on Micapeak.  In particular, Tom Cutter who runs  Rubber Chicken Racing Garage and Bob (Snowbum) Fleischer who has a great technical library on all things BMW motorcycles, answered questions I posted on the Micapeak forum and in personal Email and phone conversations.  I also used web materials posted on  Duane Ausherman’s site.

Here a few pictures from the write up.

Make-do Engine Stand

Make-do Engine Stand

10mm Long Bolt in Alternator to Block Crackshaft

10mm Long Bolt in Alternator to Block Crackshaft

Flywheel Bolts out And Oil Leaking

Flywheel Bolts Out And Oil Leaking From Crankshaft Hole

Removing Oil Pump Cover with Impact Driver

Removing Oil Pump Cover with Impact Driver

Tightening Bolt to Pull Rear Main Seal

Tightening Bolt to Pull Rear Main Seal

Heated to 220 F

Heating Flywheel Bolt Circle to 220 F Prior To Installation