Area Representative Paul Richards Posted February 26, 2015 Area Representative Share Posted February 26, 2015 I'm rebuilding my K series with Accralite forged pistons and am fitting the piston rings with no instructions. The oil rings are straight forward. The two compression rings have no "TOP" markings. There is a ring with a small step in it which I assume is number two (middle) and is fitted with the step to the bottom. There is a copper coloured ring which I assume goes on the top of the piston. This ring appears uniform in shape ( to my eyes) but appears to have a small mark close to the gap. I assume this mark should face up.Can anyone confirm? Link to comment Share on other sites More sharing options...
Domus Posted February 26, 2015 Share Posted February 26, 2015 Hi Paul The step is a "Ridge Dodger" it goes at the top of the top groove. Any carbon build up on the cylinder edge would damage a full ring so a step is made to allow for any carbon build up. See you tomorrow. Link to comment Share on other sites More sharing options...
oilyhands Posted February 27, 2015 Share Posted February 27, 2015 Err.. With respect, that is incorrect, the ring with recess is not a ridge dodger (which would only be on a top ring). The ring is a Napier scraper and the ridge/recess goes at the bottom of the ring. Any markings are always to the top face of the ring, so the top rings should be fitted with the mark upwards.Oily Link to comment Share on other sites More sharing options...
Domus Posted February 27, 2015 Share Posted February 27, 2015 Well you live and learn, I must admit a Ridge Dodger on a new piston and liner sounded strange. Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted February 27, 2015 Author Area Representative Share Posted February 27, 2015 Thanks Dave. Helpful as always.Sounds like I had it correct. Link to comment Share on other sites More sharing options...
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