I had taken the cylinder head off a while back and could see the piston head, looked in good condition, no scoring to side of cylinder, - might come out easily? - fat chance! Now with the mag flange off and access to the crankshaft, started tapping the crankshaft round with a bar in one of the crankshaft holes - it started to move, - got all excited, - until I realised the cylinder was moving off the casing with piston firmly stuck inside - der! Once cylinder had seperated by about an inch, put some wood inbetween and wacked top off piston with a large hammer on a piece of wood - after a while - nothing, its stuck fast.
Have a google search for inspiration, - cutting through the conrod is an option, but want to save as much as possible.
Have a plan, - over next couple of days cobble together a stand so that the cylinder is supported upright with engine swinging freely below, so that when I whack the piston theres no force on the engine.
above pic shows the completed stand - engine with cylinder head bolts/studs removed- an old steel framed stool with seat removed ( and placed underneath in case engine drops) and two pieces of square profile tubing (old table legs) kept together with a couple of bits of 6mm threaded bar with nuts/washers. Top up the cylinder with diesel and leave to soak for a week.
After a week give the cylinder a good going over with the blowtorch - get some wood and start hammering the piston head, - then start really hammering the piston head, - the start really, really hammering the piston head, until Im surrounded by mounds of smashed wood, - cant see any discernable movement - but convince myself its moved at least a tenth of a millimeter. Clear up the carnage, top up with more diesel and leave for another week.
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