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Re: 1940 Model B cylinder / piston options

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Author  [Modern View]
jd50 puller

10-24-2013 19:41:09

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Hinrich's repair 815-778-one900. He has all kinds of replacement pistons or can point you in the right direction. If the bore didn't get messed up to bad you may get away with .045 over. sleeving a block is a waste unless the block is really messed up and even max rebore cant fix it. because then you can't rebore it later without spending way more than it should cost. Someone did that to my 50 sleeved one cylinder and now its a paper weight as far as I'm concerned. If the damage is above where the compression ring stops and the rest of the bore is OK and within specs hone it real quick but don't take a lot out and clean up the damage at front of block with a die grinder and a flapper wheel to take high spots off before honing. Remember these tractors sometimes have an inch to an inch and a half or more between the block deck and compression ring. As long as the piston has room to float and doesn't drag it isn't going to hurt a thing. Just make sure there is nothing stuck in the block from the valve breaking. If you want a refreshed motor that is in a budget .045-.09 over is a good range and most of the time the pistons cost the same across the board from stock to max overbore. Have the head cleaned up with new valves and springs and it will be a good little motor that will last a long time.

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