Boxerworks.com

Hi all, Is it possible to remove and replace a single row crankshaft spocket( 1983 g/s) using the BMW tool without removing the engine. All the videos and pics i have seen are with the engine removed . Thanks .

EDIT: your title said crankshaft sprocket, your text said camshaft sprocket, not sure which one you want to replace. (I guess you edited it since.)
Short answer: YES. Crankshaft sprocket easy. Camshaft sprocket, a bit more complicated.

Oops sorry gspd , i mistakenly put camshaft instead of crankshaft in the question.Corrected it now . The crankshaft sprocket is the original with 175k mls on it .

Thanks gspd , having a bad spelling day , even even with my glasses on!

Re-assembly tip: Bake the new crankshaft sprocket in the oven at 375F for half an hour and douse the end of the crank with freeze spray the new sprocket will slide right back into place with minimal resistance. Gloves recommended.

Freeze spray , thats a usefull tip .thanks again.

Snowbum writes about changing the timing chain on this page:

https://bmwmotorcycletech.info/timingchain.htm

He has info about 2/3 of the way on protecting the nose of the crankshaft.

Kurt

Thanks Kurt , i will check it out .

Yes, quite possible to remove the crank sprocket with the engine installed. Even easier with the fork off the bike! Or at least pull the front wheel and fender.

I have a hot plate, saucepan, and some motor oil for heating the sprocket for install. If done right, it will slide on 99% of the way and you'll use a press to make sure it's all the way on.

My advice is to mark the new sprocket on the outside where the grove is for the woodruff key. That way you can quickly and easily orient the sprocket properly.