Sunday, March 6, 2016

Now the Work Begins

On Saturday afternoon, Bridget and I drove (in the car) down to Delta Junction to pick up the Ural parts order from Mickey. The heads aren't new but Mickey went through them both, replaced the valve seals, lapped the valves and they look like new. I still need to thoroughly clean the flywheel and make sure that the clutch plates fit smoothly. I still hadn't gotten around to cleaning the bike frame.

I think I have worked out the assembly process in my mind as I have been trying working out alternative assembly procedures that limit stress on the crankshaft. Since I knew the crank needed to be replaced during disassembly once the cylinders were off, I used pneumatic tools and large hammers to simplify the process. Assembly needs more care. I also plan on bench testing the oil pump just to make sure it flows as it should. Urals don't don't have an oil pressure gauge or even an idiot light. Oil flow and adequate pressure seems to be based on blind faith that the oil pump is working as designed.

Assembly begins. Stay tuned...


9 comments:

redlegsrides said...

What would we do without those gobium videos eh? They make it look so straightforward and simple....I know you'll do just fine, me, I'd require some adult supervision.

BMW HACKER said...

Wow...guess I missed something posted earlier. Didn't know you were doing a complete rebuild. How many miles on the engine?

redlegsrides said...

oh and lots of pics and narrative please, am sure there's an engine rebuild in Scarlett's future.

Scott Seidl said...

I don't know a dang thing about Ural engines but I wonder if its possible to tap into an oil galley and add a gauge. It could be a fun project or a possible mini disaster.

RichardM said...

It's a good thing that it's a simple engine... The only challenge is knowing how hard and when you need to use a hammer.

RichardM said...

The engine has about 45k km. Not very many. I think the origin of the problem was running when it was too cold without a full sump. But yes, a full rebuild. The engine was just short of seized of one of the rod bearings. And the crank is not rebuildable. Some of the rest is opportunistic.

RichardM said...

Possibly. I've been thinking about a way to put in even a sensor. The pressure is actually pretty low like 15 psi cold. So a pressure sensor set at like 4 psi would still be good to have.

BMW HACKER said...

Sidecar duty is tough on everything. My BMW rig is getting a bit "tired"...transmission / drive splines especially. My engine is somewhat "noisy" when hot, I just keep my ear plugs in and hope for the best...lol

RichardM said...

My BMW has almost 3x the mileage as the Ural and it still starts well at even -40° and the engine is still quiet and pulls well. But then again, I don't carry a passenger or pull a trailer.