<VV> Piston rings concern

[J R Read_HML]

I think that was a 2 cycle engine and Corvairs use 4 cycle engines.  SOME of 
them (Corvair engines) came with valve rotators.  I know that we are talking 
about rings here, but AFAIK the same principle (even the ware) would apply. 
Space the grooves 1/3 around the piston from one another at installation and 
sleep well at night.

Later, JR


----- Original Message ----- 
From: "D. Monasterio" <dmonasterio at megared.net.mx>
To: "virtualvairs" <virtualvairs at corvair.org>
Sent: Wednesday, July 25, 2007 8:12 AM
Subject: <VV> Piston rings concern


   Every time I install rings there is a concern that comes to my mind. I 
know how to install them and the gaps position but, how long they will 
retain the original position ? Do they rotate eventually ?
   Back on the early 60s I had a German motorcycle (Durkopp, 2 cycle engine) 
and it had a small pin inserted in each grove of the piston to prevent rings 
from rotating. The ends of the rings were trimmed about half of it's 
wideness to allow installation with the inserted pin.
   There is enough room on a Corvair piston (1st & 2nd grooves) for the pin 
and trimming the ring ends looks easy.

   What do you think about ?

   Daniel Monasterio (at home, assemblying GB engine)
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