[TR] TR 3 A REAR ENGINE SEAL

[Randall]

Yes, that's right.  When setting with the mandrel, use shellac on the faces
against the block and main cap.  Not on the scroll area.

Later, when doing the final assembly with the crankshaft in place, it
wouldn't hurt to paint a little shellac on the seal faces where they meet.

Two other points:
1) There appears to be an error in the mandrel dimensions given in the
workshop manual.  See attached diagram.

2) There is an updated "Viton" seal available, that still uses the scroll
but adds a lip type seal.  Highly recommended.  Invented by a German TR4
racer who was upset about being black flagged when his TR4 "marked it's
spot".
http://www.tr4-racing.de/eng/madmarx-racing.html

IMO, you should stay away from the other lip type seal offered by some other
vendors, as it requires the scroll part of the crankshaft to be machined
away.

-- Randall 
56 TR3 TS13571L once and future daily driver
71 Stag LE1473 - awaiting engine rebuild
71-2-3 Stag - awaiting gearbox rebuild 
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