Pete, Brad and List,
I have assembled a few TR 4 cylinders reusing the
original style seal and have not had major leaking.
If the engine is tired and has excessive blowby it tends
to leak more on highway runs, but otherwise not bad.
My concern with the new style seal involves the major
amount of material removed from the scroll area. Does
this not weaken the crankshaft near the flywheel mount
flange? Maybe some racer's could shed light on this issue.
Possible with a lightened flywheel it does not matter.
BTW I used a Moss nylon tool to center the seal, and
personally have not seen leaks big enough to call for a
different type .
Bill DeWar
NJTA----- Original Message -----
From: Dianne Fullam <dfullam@albany.net>
To: Brad Eells <bradlnss@lightspeed.net>
Cc: Triumph Team. Net <triumphs@autox.team.net>; Friends Of Triumph
<fot@autox.team.net>
Sent: Thursday, November 22, 2001 12:56 AM
Subject: Re: TR 4 Cyl Engine Factory Rear Seal and Tool
> where I used to work. It is steel, 2.823" in diam. I used it to
> reinstall the original scroll seal, which has never dragged and has no
> wear. I also used it on a friend's TR4A engine, with no reported
> problems. I'd say the leakge is less than I expected. I've never
> understood all the furor about changing to lip type seals, at least on a
> street engine.
>
> I did a Volvo B-18 engine, which also has a scroll seal. I didn't have a
> mandrel for it, so I set up a feeler gauge at half the difference in
> diameters. It took a little fiddling, but it went together and didn't
> leak.
>
> I came up an inch short on the rear bearing block felt seal. I got out a
> spare piece of felt and found a moth-eaten tunnel thru it. It was late
> and I wanted to close up the bottom end, so I made a section of seal out
> of a wine cork. Shaped it up with a razor blade, dunked it in the cement
> and hammered it in. Six years later, it's still there.
>
> Cheers,
>
> Pete Fullam
> 63 TR4
> Original block
> Original seal
> Original owner
>
> Brad Eells wrote:
> >
> > OK Gang,
> >
> > Seems to be a lot of comment out there about the Factory original
aluminum
> > rear crankshaft oil seal and the dimensions of the tool used to center
and
> > place the seal. This tool is referred to on Page 1.117 of the TR4
Factory
> > Workshop Manual.
> >
> > I would like to do a survey much like Jack Drews did several weeks ago
for
> > the modern seal conversion.
> >
> > So here goes, if you have replaced your seal with a factory type
aluminum
> > scroll seal:
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