On Sat, 04 Oct 2008 00:26:58 +0100, Mark Rand wrote:
On Fri, 03 Oct 2008 02:30:45 -0700, Gunner... wrote:
On Thu, 2 Oct 2008 06:19:00 -0700, "Stupendous Man" ...wrote:
Having taken apart many engines that have sat for 70 years or longer, I
have had good success with Coca-Cola. Sometimes it takes a week or even
a month with Knight type sleeve valve engines that have iron pistons
installed with .0015 clearance.

Its got a half can of Kroil sitting in it, with periodic bashings using
a 1x1 and a hammer, around the edges of the piston.

Is it worth putting the head back on or drilling/tapping to suit and
fitting a bit of ground/milled/shaped/scraped heavy plate. then
completely filling the cylinder with oil and screwing a threaded rod
into the plug hole?... you'll get the most force for the least localised
stress by hydraulicking the piston rings loose.

IIRC, a while back Gunner said the stuck piston is at BDC and
the engine would have to be detached from the generator before
the oil pan can be taken off and the rod pulled, and unhooking
the engine isn't easy.

--
jiw