On Tue, 27 Mar 2012 15:45:02 +0000 (UTC), David Lesher
wrote:

Gunner Asch writes:


Replace it with a new rod
Replace it with a used rod
Have it flame sprayed.

Never heard of flame spraying, but a friend's uncle repairs
up to 16 ft. crankshafts. First a welder builds up the worn
bearings. Then the crankshaft lathe regrinds them. He has to
redrill the oil passages.

I could see something similar on cylinders. No offsets needed
on the lathe.

Flame spraying is more common on small parts, including smaller
crankshafts. It's been around for at least 70 or 80 years. It's done
with a special O/A torch; you can spray almost any metal. Plasma is
used, too, although that's usually called "plasma spraying."

However, the main use for those techiniques is for repairing expensive
parts. A hydraulic piston rod probably won't be worth it. Cleaning and
prep take some time.

A new rod sounds smarter in this case.

--
Ed Huntress