I drove my GT6 in to work this morning. I'm happy to report that the gearbox
worked just fine.
I must report unhappily that the clutch is more needy, which is to say less
clutchy. It's a problem I've wrestled with before.
As I'm driving it seems to build pressure in the hydraulics so that eventually
the clutch slips. The quick fix is to crack open the nut where the line goes
into the master cylinder, allowing a teaspoon or so of clutch fluif, which is
to say brake fluif to escape.
It did this a few days ago on a brief drive. It did it again this morning
while I was tooling down the highway. A common condition for most occasions
that I recall is that it was cold when I started out. And I suspect that if I
mash the pedal down too hard it can bring on this condition. Or least not
mashing it hard seemed to have avoided it for a long time.
I'd suspect a sticky slave cylinder except that this morning it seemed to have
come on when I wasn't using the clutch at all. At least not that I recall.
Okay, maybe once. An alternate stickiness factor could be the clutch arm
scraping against the tunnel cover. I can check it but it's one of those
space-age plastic covers with no dangling insulation underneath, so I doubt
this possibility. It really seems to correlate to heat.
So the question: Is there evidence to suggest that brake fluif expands
noticeably with moderate heat? (It isn't getting especially hot.) Perhaps
older fluif that might have absorbed water sitting even in an opened once but
tightly sealed container?
Of course, the obvious fix is just to purchase new cylinders, clear out the
line, then use DOT5. Spitbits lists the SC at about $50, the MC OEM for about
$150 and MC repro for about $65, IIRC.
tanks,
Jim Muller
'70 GT6+
'80 Spitfire
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