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263 gas -can i bore to 282 gas pistons?

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bryan schroeder

01-02-2007 19:56:49

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i have a 706 that somehow somewhere had a sleeveless 282 gas engine out of a 503 combine installed.the block is now cracked(froze) and is no longer usable.i found a sleeveless 263 block thats good-Can i bore the 263 block and reuse my 282 piston(which are .030 oversize).????? ????? were talking about jumping from a 3.5625" bore clear to around 3.715 (about .1525" over the original 263 bore)anyone have some advise on this???

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Nat 2

01-03-2007 05:32:22

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Re: 263 gas -can i bore to 282 gas pistons? in reply to bryan schroeder, 01-02-2007 19:56:49

As far as I know, the blocks for the 263, 282, 291, and 301 gas engines are all the same. The only difference is the diameter of the holes.

Yes, it's a lot to bore out, but the engine was designed such that it could be done, and was done tens of thousands of times by IH, as this engine block design was installed in 560, 656, 706, 806, 756, 856, 666 and 766 gas tractors as 263, 291, and 301 cubic inch versions.

If you can re-use the 282 pistions (dunno about the wisdom in that), the block could still be re-bored for 291 sleeves in the future, and may be able to accept 263 sleeves without being re-bored at all, as I seem to recall that the 282 was simply a 263 with the sleeves removed.

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bryan schroeder

01-03-2007 10:49:42

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Re: 263 gas -can i bore to 282 gas pistons? in reply to Nat 2, 01-03-2007 05:32:22

i thought maybe IH might have used different molds to changed the the thickness of the block around the bores for different c.i.d. -i asked this question as i do not want to spend more on this tractor that it will ever be worth as im not going to keep it

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MattofVinings

01-03-2007 03:39:03

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Re: 263 gas -can i bore to 282 gas pistons? in reply to bryan schroeder, 01-02-2007 19:56:49

Personally overboring by .150" seems like a lot. However that's in reference to car and truck engines which run faster, produce more power, more heat etc.

If this is a "fun" project to work on your own engineering development, by all means have at it. However, if this is something you need to rely on then I think I'd be spending towards a more proven solution.

My .02.

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the tractor vet

01-02-2007 22:53:28

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Re: 263 gas -can i bore to 282 gas pistons? in reply to bryan schroeder, 01-02-2007 19:56:49

Depends on just where she is cracked if it is down a cylinder then it is fixable and why would ya just want to stop at 282 when ya can go to a 291 with sleeves and have and engine that is rebuildable .

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