Replacing BMW R1100 R rear main seals: Oilhead Boxer engine (like R1150)

Replacing the two-part rear main seals or crank seals (crankshaft seals) on my 2000 BMW R1100R oilhead engine. Same sort of process for R1150 engines even with the single seal. Not a difficult job, just be careful/methodical and don’t force things. It is also a great opportunity to take a few other bist apart and have a good clean up while you are in there.
The clutch on this bike had recently been replaced (thankfully no contamination from this seal issue) but I would probably have changed it if it was still the original (57k miles on this bike - one of three oilheads I own at the minute). It’s a recent arrival to the stable with good history but look at the state of that inner seal - what sort of job is that? Looks pretty old to me, if not the original…

[@docimastic]

A well done and very informative and helpful video. It is excellent! Thank you for taking the time and effort to make the video and post it to help people like me. Much appreciated! Thanks, David

[@johndglynn]

Thanks David 👍🏻

[@MrJonno62]

Hi john, just an update on my r1100rs. My engine had a single seal and I used the coke can method, the flywheel removal/ refitting was easy. new clutch in and fresh fuel filter plus the intake pipes were replaced by the gs types which have given a useful boost in the midrange. Really enjoying the bike and can’t wait for summer! Thanks for your enlightening video!

[@johndglynn]

Excellent John - safe riding mate!

[@jayjohnston2821]

Not the original seal I got caught out with those on an 1150GSA I rebuilt for someone The BMW ones are great as you can see they have seated correctly Nice work Nice Video Thank you on a Dreary Sunday Morning Trying to remember when I had put the Seal forming tool this time!!! #ItsInASafePlace!

[@peterhimmelman9241]

Nice and informative. Thanks for sharing!

[@jarccomotocyklem]

Thanks, very good manual!

[@SirLuLzDalot]

Brilliant... I was going to buy a 65mm speedi sleeve, a coke can sounds better and cheaper. Good work. Great video

[@raphaelaubert584]

very very nice job. Does it leak today ? Regarding the manual, you seems to put in the wrong direction the seal, Am I right ?

[@johndglynn]

Thanks Raphaël. No engine leaks now, although the transmission output seal has just started leaking! I have another transmission I can fit and then I will strip and rebuild this one with seals and bearings. This seal is installed correctly, not the wrong way around ;)

[@SirLuLzDalot]

John Glynn Can you do a time lapse of tranny rebuild if you do, then voice over on main issues.

[@raphaelaubert584]

thank you !

[@ВладимирВахутин]

Здравствуйте. С каким усилием затягивать гайку передней подвески, которая закрыта заглушками.

[@MrJonno62]

Good video, thanks for uploading it! I’m just about to do my seal/s, mine is an early 1100rs so I don’t know if I have a double seal system or a single, Ive bought just the one for now...

[@johndglynn]

Probably a double seal John - you can check the RealOEM website to look at your bike in parts diagrams. I have three 1100RSs at the minute: two ex-Police and one civilian. Great bikes!

[@MrJonno62]

John Glynn Thank you for that, I will get the inner seal as well, Ive been advised to do it although the clutch itself is dry, there was a little oiliness down in the lower right hand corner, the area behind the flywheel seems dry, Ive already changed the input shaft seal so I’m not sure where the dampness came from. I’ll find out soon enough!

[@johndglynn]

@@MrJonno62 Looking forward to hearing how it went! Good luck John.

[@billywilliams8833]

Are the seals you fitted Genuine BMW parts ?? Thanks

[@johndglynn]

Yes

[@billywilliams8833]

@@johndglynn I thought so, the ones that came out were copies, they are nothing but trouble even when fitted correctly.

[@mvdeano]

No caffeine?? I couldn't do it....

[@johndglynn]

Plenty of caffeine from other sources! We do not go short ;)

[@abozaminful]

Can you remember the dimensions for me?

[@johndglynn]

Which dimensions? BMW will sell you the seals and then you just need a standard 330ml drinks can to fit them.

[@abozaminful]

@@johndglynn Seals sizes so that I can buy them from the market, there is no bmw shop near me