Big Ends seized

[dirtsurfer]

being an absolute sucker , I purchased a partial R65 engine that looked pretty shabby. I had a vague fantasy that it could be bought back to life or at least provide some spares. As I inspected further I may be wrong on both counts. The oil scavenge has been broken off
One of the bolts for the oil filter inspection cover sheared off
This is fixable I think.
The main issue is the big ends seem to be seized. The engine came with the right cylinder removed and the left partially ; I cant budge the left cylinder any further than perhaps 10mm or so with a lot of WD40 & heat (applied from the cylinder free side)
.
I broke off a part of a fin when the wood I was hammering slipped away from the base.

The engine appears to have been stored with the sump off so the internals have been exposed to the elements for some time.

Any ideas for removing the cylinder?

[dirtsurfer]

The clutch was hard to get off too

[melville]

Stick blocks of wood between the cylinder flange and the case. Then use your BFH with another piece of wood as a drift on the top of the piston.

Good luck! Indeed, it looks like there's blessed little to save there.

[barryh]

So if it seized when the pick up fell off and starved it of oil, there won't be hardly anything to save. The crankcase is scrap and so is the crank as re-grinding isn't recommended. The 78-80 cylinders can be re-bored but not the post 81 and your engine looks to be post 81 so the cylinders are scrap too. At least you'll know how to strip an airhead engine by the time you've finished.

[dirtsurfer]

...... At least you'll know how to strip an airhead engine by the time you've finished.

Yes, this is what I'm thinking - usefull for educational purposes

[SteveD]

Bugger, it looks kaput. I won't link to the crank regrind thread.

There is an option or two...

coffee table.jpg (477.1 KiB) Viewed 520 times

The learning aspect is good though. Disassembly and re-assembly. It might be a useful tool for someone to strip and sort as a dry run before doing their own in earnest? Have you got the tools for the main bearing etc? Maybe the local beemer club?
I'm seeing an occasional rainy Saturday arvo tutorial for an interested party. They bring the beer o'course.

Doing the same thing for a transmission would be good too.

HNY y'all.