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FWIW, looks to me that the distance from
the rotor to the housing causes more or less bending force on the
seals. If the distance is large, then more side force is exerted on
the seal and stressing it to the breaking point. Since Tracy has a high
time engine - so far with no seal problem and is not babying his
engine, could this be the reason some are getting more seal side wear
than others? How can the rotor to housing gap be accurately measured?
How much does it change with temperature?
Wendell!