<VV> old piston - new rings

[djtcz at comcast.net]

 original - "I tried that, new rings on old pistons, and the rings broke up into pieces in a hundred miles or so."  RonH
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On new or used pistons I check the rings for- 
-free turning when in the ring groove. 
- Piston ring grooves are also sealing surfaces, and must be clean, smooth and free of defects. 
-proper side clearance (0.001 to 0.006 inch) using a feeler gage and the ring sharing the groove. Hastings relates excessive side clearance (worn piston) to ring breakage, among other bad things. http://www.hastingsmfg.com/Tools/gl_spacers.htm - (ring spacers)restore the top groove to its original width eliminating breakage of the top groove ring
-~ 0.000 inch "back clearance" .  I want the ring face to be flush with the piston land when the ring is pushed all the way into the groove. http://www.21cgt.com/FMWebCatalog/default.htm
- no cylinder ridge.  The ring and piston don't like whacking the ridge 3000 time a minute.
--
Dan Timberlake