Al Smith
Mac Daddy
A lot of this odd ball stuff might be of interest or it might not .You can shake an engine loose using a grease gun filled with oil using a home made adapter made from an old spark plug with a grease zert .Most grease guns put out 5,000 PSI so it will either come or bleed. I have a zillion pipe taps but they could be brazed in place instead of tapped using threaded bushings .You need to take all the spark plugs out and drown the cylinders with a good penetrating oil and let it soak in .One of those adapters has an air chuck and that might help applying some air pressure on the cylinders .Find a cylinder coming up on compression with the valves closed and fill that cylinder full of motor oil.Then using an adapter with a zert then apply the oil with the grease gun .You only have to shake it about a 1/4" usually .Don't try it on a cylinder at top dead center,that one would be hard to move,about half way up would be best . The pic has M18 adapters but I also have a set for M14 .Those I've used on stuck chainsaw engines .
You can also use compressed air to hold the valves up on an over head valve engine and change the seals without removing the cylinder head .Sometimes you could stuff a rope in the cylinder ,run the piston up tight and do it that way also .
You can also use compressed air to hold the valves up on an over head valve engine and change the seals without removing the cylinder head .Sometimes you could stuff a rope in the cylinder ,run the piston up tight and do it that way also .