BMW R1100GS head removal part 2 Will it run? Arrgghh

[@aaron___6014]

No problems! Thanks for sharing your expertise.

[@RestorationBiker]

Many thanks for your comments.

[@AnalogDude_]

Nice job and bike, Did you know it was actually some guy called "Krauser" that made a 4 valve head assembly for the R100 models before the R1100RS was out, it was even reasonable priced, 6 more hp, but BMW moved a cam "inside" there.

[@RestorationBiker]

Hi, no I didn't know that. It is quite a complicated design the oil head engine. When you think of it, it could have been an OHC engine with no pushrods. Seems quite 'fussy' to have the cam, pushrods cam chain, and the jackshaft all spinning around in there.

[@AnalogDude_]

The R1250 shift cam has a stroke of 76 mm and is a real DOHC, the R1100 has a stroke of 70.5 mm, but the R1100 is somewhat a evolution of the R100, some parts are pretty common and it was made for like 2 decades. Yet the R1100 looks wide when i look from above or from the rear down and indeed pushrods sounds weird. Also the frames got alot stiffer on the and r1200 and again on the R1250 models vs the R1100 / R1150. @@RestorationBiker

[@AnalogDude_]

Another Beast of a BMW bike is the K1300R, that's blazing fast and cool frame assembly.@@RestorationBiker

[@RestorationBiker]

Yes a real beast of a bike there.@@AnalogDude_

[@AnalogDude_]

reviewing your video and the maintenance manual, because i have little blue smoke and i think it's the valve stem seals (after 30 years). it's says: first torque to 20 Nm, than 2 × 90º, than tighten m10 to 40 Nm (are there any other M10 "screw"?). Kinda weird written in the manual.

[@RestorationBiker]

Hi, Yes these engines do suffer a bit with blue smoke on start up. I have never changed the stem seals on these engines. Done it to plenty of other engines though. These stem seals don't seem to go hard like they do on plenty of other engines. The torque settings are referring to the 3 smaller bolts . I don't normally torque them, as I feel the four 'main' studs are the main crushing force.

[@AnalogDude_]

hmmm, Than I'll wait until i can give proper shake down, i started the bike few times to keep the battery level ok and that's where i spotted the blue smoke@@RestorationBiker

[@RestorationBiker]

@@AnalogDude_ Yes, I wouldn't worry about a bit of blue smoke unless it is still there after a 10 mile ride.

[@AnalogDude_]

in 1998 the R1100(RS) engine got an update in the oil circuit, a oil thermostat. Do you know any about that? Do you need to drive the original R1100Rs engine calm in the first minutes to heat up the oil or what? i have low km bike, but still doubting to upgrade to R1150 engine with new design oil cooler and hoses. @@RestorationBiker

[@RestorationBiker]

@@AnalogDude_ Hi yes they changed the way the engine 'breathes' The early engines breathed through the front case, but the later engine had two oil seals fitted at the rear of the engine and it breathed through a small passage through the middle of these two oil seals. The amazing thing is, the early engine didn't use any oil. The later engine did. Quite a bit too. Ask someone with an 1150 about oil consumption. They will probably admit to carrying oil in the top box. Out of all the pre 1998 R1100's I have owned (quite a few) None of them ever used oil. The 1150's I have owned used about a pint per 1000 miles. Regular as clockwork.

[@aaron___6014]

I hope it runs!

[@RestorationBiker]

Ahhh, you have to watch till the end!!!

[@EDP1]

congrats.

[@RestorationBiker]

Hi, nice to hear from you, hope you are well.