Re: 1940 mod. H Farmall Engine locked up

Posted by Ralph Kramden on July 16, 2000 at 19:55:36 from (209.239.201.70):

In Reply to: 1940 mod. H Farmall Engine locked up posted by Okie-Dokie on July 16, 2000 at 15:26:19:

My recent experience with my frozen Super A engine revealed the following: The tractor was parked with plain water in it, it froze and cracked the top of the block, then it thawed and water ran into two of the cylinders, causing rust. I couldn't turn it with the crank.
This was , of course, after I put Marvel Mystery oil into all the cylinders and let it sit some, and also after I determined that the starter wasn't frozen to the flywheel. The starter was easy to remove. Then I GENTLY used a very large screwdriver to pry on the flywheel teeth, on the assumption that flywheels weren't made to be pried upon ( plus they are probably WAY expensive ), got nothing, so I proceeded to the next step, pulling the radiator to get to the pulley. I was able to get a large pry bar inserted into the crank pulley and slowly turn the engine backwards half a turn, so I figured it was either an obstruction in one or more of the cylinders or perhaps something jammed inside the block, like a broken connectiong rod, perhaps. Removing the head was remarkably straightforward and only took me an hour or so, using air wrenches. The cylinder head is substantial. Keep all the pushrods in order as you disassemble it. In fact, keep everything mentally in order. Better yet, get a good manual, which, btw, I am still looking for.
I was able to scrape a lot of the corrosion out of the bores and then ease a cylinder hone in and ream out the bores enough to get the engine to revolve, and then to tear it down. Don't rush it, it may just be slightly frozen and need a good talking to.
It COULD also be a victim of a pest peculiar to Farmalls; Rodentus Farmallis. They nest sometimes in hidden places in tractors, and may have even gotten past a valve and into a cylinder and then constructed a nest large enough to prevent the engine from turning.

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