[TR] TR-4 Rear oil seal modification

[Bob Nogueira]

I've had two professional engine builders tell me that the secret to getting
the scroll type rear seal to actually seal is to machine the aluminum seal
plates so as to reduce the clearance between the aluminum scroll and the
crank to .006 to .008 from the standard .010 - .012.

This approach appeals to me in that it does not require any modification to
the crank. ( I've been that route and have the oil stained driveway to prove
it).

Anyone tried this modification?

Bob Nogueira