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Tractor Pulling Discussion Forum

Who bores wet sleeve blocks?

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Lamont

10-21-2003 18:44:21




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I'm not having any luck finding a local machine shop that will bore my block to accept these bigger sleeves. They all tell me they're afraid to try a wet sleeve block. Who is the best one to do this? I'd like to stay close to Arkansas if possible, but if not I'll travel with it. I need your help bad. I'm ready to get this CASE built. Thanks in advance.

Lamont




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TimC

10-21-2003 20:54:12




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 Re: Who bores wet sleeve blocks? in reply to Lamont, 10-21-2003 18:44:21  
I have a friend in middle tn that can do it right.
He bores out to a desired od for the sleeve down to .500 or less in some cases to the bottom. This leaves a step. The sleeves are turn to match this step. There is .003 interferrance between the sleeve and the block on the straight cut and the step has its own .003 interferrance. Swab the bottom with jb weld. Freeze the sleeves and drive them in. Braze in the top of the block after cutting a grove or v or channel around the sleeve. Brass works well because it expands basically at the same rate as cast. This makes the sleeve seal and the sleeves and block become one at the top so it won't split. Pour in a few inches of block filler to help seal it up on the bottom. Then deck it then bore it then hone it. Makes a very solid block. Will not leak if done properly and will not split. I have seen it done several times with no problems. If you are going with a very big bore and a lot of compression make sure you use thick sleeves. ChadS has found another way to seal the top of the block but I can't verify that it is better but would be a lot faster and eaiser. I can give you a number if tn is not to far away. I have also seen motor not done this way that split down the middle or leak out the bottom. Some live several season so never make it one.

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