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Larry NAA
07-02-2002 08:40:36
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Re: 1953 Golden Jub 134 Block question? in reply to Mark Hendershot, 07-01-2002 15:20:31
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This is only somewhat related to Mark's post, but I recentely rebuilt my NAA motor. It smoked, it had very low compression and needed new pistons and rings and I decided against new sleeves. Instead, I had the old sleeves re-bored, 0.02" over, and I put in new, oversized pistons. The reason: I did try to instal one sleeve, and it went in just fine. But it got significantly out of round as a result. I can't recal exactly how much, but I think 0.008" out of round was what I saw. The New Holland shop said that was typical, and 'not really a big deal'. But for the cost of sleeves, I had it re-bored, leaving the sleeves in place, and the bores were so round I could not measure any error. At any rate, the sucker runs great now, and does not smoke at all, and has plenty of power. I also just had to take the head back off (a problem of my own creation: don't ask) and the bores looked great: no scoring or scratches, after about 60 hrs running since the rebuild. My $0.02 worth. And that's about what it's worth.
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