Hi Guys,
As you say, good question.
On the diaphram types, about the only thing that can go wrong is loss of spring
tension
due to overheating, or maybe face wear which would be obvious.
On the spring types, the previously mentioned plus possibly wear in the pivot
pins or levers.
Since it is hard to measure spring tension, I suspect most folks just replace
the parts
rather than take a chance on something going wrong. It's a lot of trouble to
install a
possibly weak plate & then have to change it later. Although you can see &
measure wear on
the disc itself, why put a worn one back in, only to replace it a bit later.
My factory shop manual has a section on measuring & rebuilding the pressure
plate. Lot of
special tools required & replacement parts called for. Clutch rebuilders have
the jigs &
tooling to measure pressure plate tension & dimensions but few of us mortals
have the
necessar equipment, inclination, or even access to the parts.
I once gathered all of the replacement parts for a clutch job, only to find
that the
release mechanism was binding. Corrected the problem, no more clutch slip, &
still have
the replacement parts in their boxes.
Regards,
Dave Russell
Bluechipracing wrote:
> Good question, Joe: What goes bad on a pressure plate? Springs weaken?
>clutch
> surface scored? I have about 10 used Healey pressure plates which are
>probably OK, but
> how do you test them?
>
> Jim Smith
>
>
> ----- Original Message ----- From: "joe mulqueen" <joemulqueen@yahoo.com>
>To: "healey
> list" <healeys@autox.team.net> Sent: Monday, January 01, 2007 3:38 PM
>Subject: used
> pressure plates
>
>
>> Hello, Garage cleaning question: Is anyone rebuilding used Austin Healey
>pressure
>> plates? Thanks, Joe Mulqueen '60 BT7 project Santa Clara, CA
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