Re: Need a Little Help for a Friend !!!!!!!!!!!!!!

Posted by RN on January 12, 2004 at 16:44:47 from (166.126.218.251):

In Reply to: Need a Little Help for a Friend !!!!!!!!!!!!!!!!!! posted by BIG JOHN on January 12, 2004 at 10:33:10:

Oversize rings? Possible- early 70's working in Illinois for jeep dealer and auto parts store with machining services. Machinist would sometimes do about .010 inch overbore cylinder, ridge ream, knurl piston skirt and install special 'service' ring- thicker outside diameter, sometimes chrome plated. Austin/english car engine parts book showed special top compression + size ring with outside bevel so no ridge reaming required- got for mechanic for Triumph Spitfire. Small engine shop did service rings for Kohler engine. These were special rings for certain engines/sizes only. Engine rebuilder shops would have catalogs that might have a 3inch + ,010 ring set that might fit, need to check cylinder for roundness, knurl piston skirt to reduce slap. This procedure was used when customer like a used car dealer wanted cheap fix or when old engine didn't have replacement oversize pistons available, or manufacturer expected to replace rings once on stock pistons as normal procedure-soft iron, thin rings as aircooled small engine or motorcyle- R50/2 BMW rider noted he did this when couldn't afford oversize piston set, had about 20,000 miles on ring job at the time of rally. RN.

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