I am fairly new to working on old tractors and need some help.
I have a 620 that has been sitting indoors for 25 years but the motor is stuck.
For a couple of weeks I have been squirting the sparkplug hole with PB blaster.
I have been trying to move the flywheel back and forth with a bar I made that goes in the casting holes.
No movement so I have been taking parts off, I tried to take the head off this weekend.
I had 4 full studs come out pretty easily, the other 3 studs are still in the head but the nuts came off easily.
The head is really stuck to the block. I tried to put small bottle jacks between the block and the head.
I tried gently beating on it with a soft hammer. None of this worked either. Any ideas?
I was thinking the three remaining bolts are hanging me up and maybe I need to heat them up with a torch.
Also I see some people fill the spark plug hole with penetrating oil, maybe that is something that I should do,
it makes sense that the fluid isn't getting completely around the cylinder.
Any help would be much appreciated.
FYI the oil was black but looked good, not cloudy. The antifreeze looked good too, just a little rusty, still had some green in it.