Has now fitted new cylinders and pistons, without the use of sealant. Have run the engine on the starter to verify that there is oil to both top ends, but it only came on the left side a normal amount, nothing on the right. I am sure that the holes are not blocked, have also verified with compressed air that there is a passage between the right and left bolt (where the holes for oil are located). I assembled together and thought a start-up of engine with a little idle would help, but no... Driven engine for 3-4 min without signs of oil on the top right side, all normal on the left. The amount of oil on the bike is correct, and the oil light goes out when the bike starts.
What do I do now, does anyone have a good tip?
That said, I know it's pretty scary to put everything together and not get oil to the valve covers. You've driven the bike a fair amount and still no oil to the right side. Usually I just remove valve covers, drop the float bowls, and then crank the starter for what seems like a real long time!
The oil that migrates is from inside the engine splash that finds its way to the top studs and goes out those holes. It comes down the upper stud holes, through the rockers, and then gets splashed around inside the valve cover.
So, clearly need to be sure those holes at the base of the studs are not plugged. Can't see how the tubes that the studs run is are blocked. What could be happening is that the rocker shafts could be on wrong. There are some prick marks on the top of the pillow blocks. Does the right side look the same as the left side? Those prick marks should be on top and on the outside of the pillow block. Anton Largiader talks about /5 rocker shafts at the bottom of this page:
'78 R100/7 '69 R69S '52 R25/2
I first tried to crank the starter, but only got oil on the left side. A normal amount.
Then I started the bike and let it run at 1000 rpm for probably 3-4 minutes. Not a drop of oil on the right side.
I have checked that the holes at the bolts are not blocked. With a small piece of steel wire as far as I can, as well as with compressed air.
If the rocker shaft, I'm sure they are fitted correctly, both sides are also the same or the holes for the studs are blocked, I should still see hints of oil from the holes at the bolt end. But I see nothing even after I loosen the cylinder again.
I do not know well enough how the oil is distributed to the top end bolts from inside the engine, but to me it seems like that is where something is wrong.
I thought it was splash, but in step #12 he indicates that the front big end bearing shell has outputs that feed the top two studs.
'78 R100/7 '69 R69S '52 R25/2
Some people that might know are over on the Airheads list on Mica Peak. If you're not a subscriber go here:
Ask the same question there.
When you say you replaced the cylinders and such you say you used new cylinders and pistons? Do you mean just that or do you mean rebored rebuilt cylinders with new pistons and rings? In other words, did a machine shop rebore the old cylinders for you to use?
There is a possibility a shop not know what they are doing, or sloppy work could screw something up in their rebore causing the problem you are having. Not all machine shops are good or are familiar with airhead parts,
So, Where does this leave you? Recheck your work. Check the amount of sealant you used and how it was applied.
Sorry, I can't put a finger on the problem for you directly. I am not there, I can't see what you are seeing. I can only warn you about messing with the crankshaft and bearings, believe me, I know from experience what a job and can of worms setting a crankshaft can be.
Kurt and tool man Doug have the best lines to follow. I am sorry Randy, not to insult you going the path of the crankshaft Is only going to vastly complicate matters. I understand what you are saying but unless, as I said earlier, there has been a catastrophic engine problem, that dowel will not fall out nor will the bearing housing spin.
I don't know how much help I would be if I were there to see the bike I am sorry I am not, it makes things easier to see first hand. Perhaps looking online in this Website, or another BMW site, you can find an airhead friendly shop near you. St.