Stan---If the clutch disc was only making partial contact with the
pressure plate, it would explain the "judder" you experienced. I don't
understand the "shiny rivet" tho, as these should be well below (.062 or
so) the friction material when new.
I have no direct experience with Sachs products, but it doesn't seem
like what you have is typical.
Hopefully you don't have the classic cowl shake that plagues some
roadsters.
Dick
From:
stan.foster@hp.com(Foster, Stan)
Last winter I replaced my clutch with the TRF magic clutch system
including a Sachs pressure plate and disc. I had the flywheel
resurfaced, new engine and tranny mounts, gearbox and engine mated with
alignment dowels in place. About 400 miles after re-assembly I started
getting clutch judder in 1st gear and I lived/suffered with it all
summer.
This winter I pulled the engine and tranny for some engine work and
inspected the clutch. There was nothing broken or loose and no obvious
sign of contamination but the disc had
one shiny rivet that looked iffy. I sent the disc
back to TRF and they (Dave) returned it saying yes the rivet is oddly
shiny but there is nothing wrong with the disc. I bought a new disc
anyway with a small discount from TRF for my trouble.
So the clutch judder was still a mystery
Today I took the pressure plate and disc to the machine shop that is
doing some work on my block, crank and head. He wanted the clutch parts
to use when balancing the system. He took one look at the pressure plate
and deemed it unfit due to wear. It has a ridge where the clutch plate
engages and the surface appears "wavy". He doesn't believe that it
should have worn that way in just a few hundred miles and thinks this
could explain the judder. He was joking about offshore parts quality and
suggested I examine the pressure plate for evidence of a Budweiser label
in the metal.
Anyhoo to cut a long and depressing story short, I am wondering if this
was an isolated case or if there is a history of premature wear in the
Sachs pressure plate especially, and modern clutch parts in general.
Stan
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