[sorner]

So I have this Kohler CH18s I'm parting out, got it for free. It was full of rain water, so I'm pretty sure the block and pistons are toast. They are severely rusted. I've been soaking with various fluids and heating the bore with a torch hoping to cause some movement. I can't get them to budge yet. The problem is the crank is at the top of the stroke and the pistons are near the top also. So banging one piston with a block of wood is pushing on the other one. So I'm working against myself in a sense. Does anyone have any good ideas to break those loose? The crank looks like it's in good shape. I got the connecting rod caps off and there is very little if any wear inside. I think this is a very low hour engine, it's disappointing someone left it get this way.