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TO35 Engine Rebuild Advice

325 Views 4 Replies 3 Participants Last post by  Rick3478
First post! I have a 1959/60 TO35 gas and this winter my valve stem went on a bit of a ride. It decided to leave the head, played around in the combustion chamber got bent into a hook shape and then started its journey out the exhaust manifold where I found it during disassembly. Along the way it blew apart the piston head, bent the push rod and chewed up the valve seat. Very surprisingly, the sleeves are smooth clean with no scratches and no top 'lip'.
So, i need a bit of advice. I dont have a shop (yet) and have to work on a gravel driveway - so i can't do a full and correct rebuild easily. Given that i dont have to pull the sleeves, do you think i can replace the piston without pulling the block? Its been years since i tore down an engine (it was a 59 TR3, so kinda a tractor) and i am trying to remember the order of things.
Also, is there a decent factory service manual available free somewhere or is there a good source for a download? Thanks folks, i am sure i will be back with questions along the way.
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An in-frame repair should not be a problem. Do an internet search for "TO35 repair manual free pdf download" and see what pops up. I don't think that anyone has ever posted a link to one here. There are plenty of places that sell them. Engine parts for that little Ferggie shouldn't be hard to find.
Thanks Dave, that's reassuring. Putting together my order list, YT seems to have most of the parts, but struggling to find an intake valve seat. Anyone have a source? (Also, can't seem to edit above, its the push rod that got bent, not the connecting)
If you haven't tried AGCO they may have parts for that engine still. I think the same block and heads were used on other models with just a bit bigger bore. (Z145) If not, a shop that rebuilds heads should be able to help find what you need.
Was that a Continental engine? If so, there should be parts somewhere. Anyway, yes clean the cylinder up good and get some accurate measurements with an internal bore micrometer to make sure you get the right size piston and rings. If there's a ridge at the top where the rings don't hit, run a ridge reamer through it, then hit it with a fine hone to break the glaze. New rod bearing and fix or replace the head. Might smoke a little until the new rings seat, but should be good as new after a bit of break-in.
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