31-08-2017, 10:32 AM
I shimmed a big end, in a hotel car park, at night, in the snow, on the way up to the 1982 JOGLE run.
The crank had been re-ground, and the rods re-metalled, but something wasn't right and the shim was the only way to loosen off the engine.
In preparation for the 2012 run, I found the crank to be cracked, and changed it. The shims were still in place and the metal fine.
We hadn't done a lot of miles in the meantime, less than 10,000 I guess, but the bodge worked.
I would put the rod on without the shim - of course, it may not tighten up, but if it does, blue it and see where the problem lies. Maybe a bit of scraping will sort it.
If not, I would put it back and run it - but that is the way I usually work. My engines are un-modified, and not worked hard. I don't count JOGLE in under 24 hours as "working hard" in a lightweight special.
Simon
The crank had been re-ground, and the rods re-metalled, but something wasn't right and the shim was the only way to loosen off the engine.
In preparation for the 2012 run, I found the crank to be cracked, and changed it. The shims were still in place and the metal fine.
We hadn't done a lot of miles in the meantime, less than 10,000 I guess, but the bodge worked.
I would put the rod on without the shim - of course, it may not tighten up, but if it does, blue it and see where the problem lies. Maybe a bit of scraping will sort it.
If not, I would put it back and run it - but that is the way I usually work. My engines are un-modified, and not worked hard. I don't count JOGLE in under 24 hours as "working hard" in a lightweight special.
Simon