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Topics - aqmxv

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Listeroid Engines / Piston rings
« on: August 20, 2006, 09:12:11 PM »
I was taking the rings off the piston on my 6/1 today so everything could go into the parts washer.  Since this one-cylinder has more piston rings than I've seen in several multi-cylinder engines I've rebuilt, I was taking careful note of which side was up and which ring went into which groove.  Now the problem:  The order I removed doesn't make sense to me given what I know about piston rings.

All five rings have the trademark GOE stamped/etched into them.  One's obviously an oil ring, and logically should go at the bottom where it was found.  One is marked top. It's a stepped profile ring and was found with "top" side up in the fourth ring groove, right above the wrist pin.  Is this a scraper, or the first ring?  Does it go in the fourth groove where I found it?

The other three rings (installed in grooves 1-3) appear to be identical and symmetrical (rectangular cross section) with no top and bottom.  Some had the trademark up, some down.

I looked in the original Lister 5/1 manual, and it makes reference to a ring set or a scraper ring, but no other discussion of which ring goes where.

So who goes where, in what orientation, and why? 

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