You really shouldn't need to get everything hot. What I would do is heat the outside 1/3 to 1/2. Most any rose bud on an oxy/actelene torch is enough for that, itt just might take a while. Get it just hot enough that you start to see red, but not cherry red. Then let it cool. Do not fast cool it with water as that will cause it to shrink more. Then after its cool re-heat it and try working it again. Keep that up til you get it loose. You can peen the tube to try to stretch it, but be careful not to do too much.
The physics of heating iron are that it expands when hot, but retracts more when it cools. So any time you heat it it gets tighter when it cools. If you end up slicing it and welding it the weld will deffinately pull it tight when done. So that will require resizing the bore when done. Even with heat you can expect to need some work inside to make things fit, depending on how much wear there is.
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Today's Featured Article - Restoration Story: 1964 JD 2010 Dsl - Part 2 - by Jim Nielsen. Despite having to disassemble the majority of my John Deere 2010's diesel engine, I was still hopeful I could leave the engine-complete with crankshaft and camshaft-in the tractor. This would make the whole engine rebuild job much easier-and much less expensive! I soon found however, that the #4 conrod bearing had disintegrated, taking with it chunks of the crankshaft journal. As a resul
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