Cylinder honing.

manga_blue · Postby **manga_blue** » Thu Jun 05, 2014 8:02 pm

I dunno either, Terry. I just checked back. The set I used have a Cr plated top ring and these do require honing first. Does anyone still make sets with plain iron top rings?

Ned Loh · Postby **Ned Loh** » Thu Jun 05, 2014 9:02 pm

manga_blue wrote:.. only when the bores are in spec - no taper, no step, no oval, proper ring gap - and you do a proper high load/high gas pressure bedding-in. I haven't done it for years though but I was wondering about it. The last rebuild on the NA8 included a hone and it's never made the compression figures it had before and I'd put that down to lost bore metal and honing residue, even after I went OCD cleaning them. I'd been kicking myself about it because at 175,000 the bores still had signs of the factory honing marks.

Was the bore 'Plateau Honed'?

tbro · Postby **tbro** » Thu Jun 05, 2014 11:34 pm

manga_blue wrote:I dunno either, Terry. I just checked back. The set I used have a Cr plated top ring and these do require honing first. Does anyone still make sets with plain iron top rings?

Phil,
Try Rockauto, enginetech or sealed power
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I tend to think your problem with rings maybe lower ring tension that a lot of manufactures use now,
great for economy and good at the start but tend to drop off fairly quickly.

ACL do make rings sets but not sure if they are still available, due to factory closing down. Might be worth asking.

Terry