[TR] When to rebuild

[Dave Massey]

Have you checked the surface of the crankshaft where the seal rides?  Odds are
it has been worn by the old seal.  You can't expect the new seal to seal up
against a rough surface.  And, it seems, the folks who turn crankshafts often
neglect to dress that surface.

I replaced the seals in my TR6 diff but the pinion seal continued to leak
anyway.  After a couple of years (and a failed U-joint) I dropped the diff and
took the opportunity to install a Speedi-sleeve on the pinion flange.  This
provided a fresh, smooth surface for the seal.  Lo and behold the leak
stopped!

The moral of the story is there are two parts to the sealing issue, the seal
and the surface the seal contacts.  Both are important.






Dave Massey






-----Original Message-----
From: terryrs <terryrs at comcast.net>
To: Ed Oot <eoot at citlink.net>
Cc: Triumphs <Triumphs at autox.team.net>
Sent: Thu, Mar 7, 2013 5:10 pm
Subject: Re: [TR] When to rebuild


>When, if ever. Is a rear main
>oil leak significant enough to warrant a rebuild.

I've rebuilt mine twice because I had to.  Each time, I've not managed to
control the oil from leaking, despite going to the new real oil seals.

Then again, I insist on using Mobil 1 15-50 synthetic, and I expect Mobil
builds
into the DNA of that oil the intrinsic nature to seek my garage floor.

Not sure what you're running, but syn may exacerbate the problem....

Terry Smith, '59 TR3A  TS 58667
New Hampshire

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