I've noticed the clutch engagement points change with heat, too. Never lost
disengagement, though........
Bob Palmer wrote:
> Guys,
>
> Yesterday I had to make a trip to L.A. Since the SHO's air conditioning has
> been long without refrigerant, and the weather here quite warm, it seemed
> like a good day to drive Mr. Green. Had a few errands to do first, and
> while doing these a problem with the clutch started developing. More and
> more free pedal before the clutch disengaged. Finally, I had to pull over
> since I could no longer disengage and shift when stopped. (Can always
> shift, even without the clutch when moving.)
>
> Sooo, what the heck is the problem here?? MC reservoir is full, so no
> leaks. MC piston not returning? Knock a few times on the MC with something
> handy. Still, no luck. HMMMM Seems like the problem gets worse the hotter
> it is; like stop-and-go around town in hot weather. Just happen to have
> almost a full bottle of Perrier in the cooler, so pour 2/3 of it over the
> MC body. Voila!! Just like that, the thing is operating normally again. So,
> what to do; back home to fetch the SHO or onwards to L.A. Hell, I've got
> more cold drinks in the cooler, so what the heck. I'm off. By now it's well
> after 3:00 PM and I need to be in Santa Monica before 5:45. Seems like as
> long as I'm moving at a good clip, no problem with the clutch. But what
> about getting stuck in famous L.A. traffic? I promise myself to pull off
> the freeway and douse the MC as soon as I start seeing signs of the problem
> again. Turns out I didn't need to, thanks in large part to having a
> passenger - yes, a real live one- so I could use the diamond lane; plus I
> was headed the opposite direction of most the PM traffic. Signed in at our
> appointment in S.M. at 4:45.
>
> Anyone had a similar problem with their clutch Master Cylinder?? Is the
> piston binding inside the cast aluminum bore? Doesn't aluminum expand more
> than steel? I just recently overhauled it with new seals and polished the
> bore. Works perfectly when it's cool. Is the spring too weak? All of the
> above?? Thanks for any input before I tear it apart again.
>
> TTFN,
>
> Bob
> Robert L. Palmer
> UCSD, Dept. of AMES
> 619-822-1037 (o)
> 760-599-9927 (h)
> rpalmer@ucsd.edu
> rpalmer@cts.com
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