>From my experiences and those on a couple of old tractor nets I'm on (and
usually we are talking engines here that have been frozen solid for YEARS
outdoors) the most important thing is penetrating oil and TIME. Pull the
plugs and shoot a quantity of good penetrating oil (Kroil is one of the
better) into each cylinder, wait for a few days and keep repeating with a
little more penetrating oil. In some cases it has taken a couple of months,
but eventually they do break loose. If you can't get a good leverage on the
front nut, just put it in high gear and rock it back and forth real hard.
If this doesn't work, then you truly have a block of rust and have no choice
but to overhaul (had a tractor given to my wife as a birthday present.
Turns out it had water in two cylinders with cast iron pistons - after lots
of penetrating oil, that one still took a dismantle and a big hammer and a
piece of 2X4 trimmed to the cylinder diameter.)
If you do get it to move a little, keep working it with plugs removed (so
you won't be fighting compression of the oil.) Once you get it free, then
change the oil and pressurize the engine oil before attempting to start it.
YMMV and good luck
Frank ('59 TR3, '71 BMW2002, '51 International Cub tractor)
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