I used one once and it seemed to hold on just fine for the 7 or so years
that it was installed without return spring; what I find interesting though
is that my howe htob, with roller end, installed in my V8 says that a slight
preload is desirable so that it constantly stays engaged with the pressure
plate.
James Nazarian
71 MGB Tourer
71 MGBGT V8
85 Dodge Ram
----- Original Message -----
From: "N" <twobees@sprynet.com>
To: "Dodd, Kelvin" <doddk@mossmotors.com>; "MG Digest" <mgs@autox.team.net>
Sent: Thursday, August 07, 2003 10:24 PM
Subject: Roller Throw Out Bearings
> Here's my experience with Roller T.O. bearing:
>
> Last year when I installed the new engine, I too went for the extra $$ &
> installed a roller (brand new). 700 miles later I removed it as it was
> totally fried (I do NOT ride the clutch. But, the bearing was blue from
> overheating.). I replaced it with the old carbon one I had in for the
> previous few years. During the course of the year (July '02 to July '03)
I
> had the engine in & out a total of 5 times to replace various clutch
parts.
> At one point, I noticed that the bearing carbon was wearing off-center. I
> then re-examined the roller bearing & saw that there were tiny "swirl"
marks
> on its face from grit between it & the pressure plate. That got me
thinking
> that the bearing wasn't centered. (Brilliant, Watson! A little slow on
the
> comprehension?) On further investigation I found that the t.o. arm was
from
> the early trans. And, when I switched to a 4-synchro box a number of
years
> ago, my (then) trusted mechanic had used the old arm. DUHHHH!!! It's
> different, fella! It's about 1/3 inch difference in length. THAT WAS
WHAT
> CAUSED THE ROLLER BEARING TO FRY.
>
> So, would I use one again now that I have the correct t.o. arm? Perhaps
IF
> I had a way to adjust it away from the face of the pressure plate when
> retracted. With the stock hydraulic system, that isn't possible without
> rigging a spring & stop. If anyone comes up with a system. Let me know.
> I'm willing to give it a try. I have another roller t.o. sitting around
> waiting for a solution short of a Tilton system.
>
> Norm Sippel
> '66 MGB
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