[TR] TR Rear Crank Seal Rope?

[rjray.architect at gmail.com]

Carl,

 

I was not aware of the ropes used on other British cars, other than my Austin-Healey, which still originally leaked oil at the rear crank area.

For both my TR3a and Healey, I installed the after-marked rear seal kits, which eliminated all oil leaks from the rear crankshaft area.

 

 

 

From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Carl Sereda
Sent: Sunday, February 9, 2025 2:06 PM
To: triumphs at autox.team.net
Subject: [TR] TR Rear Crank Seal Rope?

 

Hi Listers,

 

This has been on my mind for quite some time;

 

Why do TR2 through TR4A rear crank seals NOT USE a graphited rope in the 'purpose-made' groove in the scrolled aluminum holder, when Jaguars with the same type of 'scrolled' crankshaft/seal groove do, as well as some early Ford, Jeep and other brands of motors?

 

Did the Triumph engineers decide against it even though the rear aluminum crank seal parts were already cast?

 

The special graphited seal rope is still available at Moss (for early Jags) and other makes of that period..

 

And I recently read that someone found a rope seal in their TR4 crank seal upon tear down!.. and he mentions that prior to tear down the rear crank seal leaked very little.

 

To me, it looks like the TR motor rear seal was designed to use a rope just like early Jaguars yet no mention in TR factory manuals.

 

Been tempted to add the graphited rope.. why not?

 

Regards,

 

Carl

'63 TR4 since '74

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