[urq] UPDATE - Clutch Slave Problem?

[qshipq at aol.com]

 Excellent Eric!  Glad to finally hear a story directly from an anointed one that appears to have been *blessed* by the Audi gods.  After 20 years of working on Audis Eric, I prefer 'realist' to any optimism or pessimism label.  The optimist says it's fine, the pessimist says it can't be, the realist says pray, then just do the work necessary to get the job done right.  I rarely find the optimist intersects with the realist.

Thanks for reporting back

SJ

 


 

 

-----Original Message-----
From: racingiron at comcast.net
To: qshipq at aol.com; Urq at audifans.com
Sent: Sun, Sep 19, 2010 11:54 am
Subject: UPDATE - Clutch Slave Problem?



> Keep praying Eric!  A properly functioning clutch PP tines are the return for the Slave via 
> TOB.  The slave rests in the extended position only outside the trans, it's the TOB 
> against the PP tines returns the slave/clutch pedal to the respective 'retracted/up' 
> position when installed in the 016.  I suspect the SMRpray method will at best, be a 
> temp fix.

Always the optimist, eh Scott?  You know I have high respect for your considerable experience, so I took a close look at the slave while waiting for the new cylinders to arrive.  As I wrote before, I had to hammer on the rod to free the piston.  The piston was then free enough to push it in by hand, but when released it came to rest several mm inboard of the circlip.  A light application of the clutch pedal pushed the piston to the end, but it was again frozen in place until whacked with great force.  I noticed a slight bit of corrosion/grime on the outermost section of the bore, and tried to clean it as best I could.  That, and some exercise of the piston by hand, seemed to get full travel back, although there was still a hint of stiction.

Figuring that I didn't have much to lose (except the possibility of ruining the friction disc if the slave barfed fluid), I popped the slave back in place and went at it with the pressure bleeder.  I got lots of nasty fluid (looked like liquid graphite).  Clutch operation seemed to be back to normal, so I took a short test drive.  It worked OK at first, but then it felt like it stuck briefly (release pedal, clutch stayed disengaged very briefly, then engaged abruptly), so I parked the car and waited for the new parts.

Yesterday I replaced both MC and SC.  Didn't have a chance to drive it until today.  I did around 100 miles in the local twisties, including several WFO pulls in 4th gear up steep grades to test clutch clamping force.  Lots of shifting up and down, stop and go stuff too.  I'm glad to report that it felt normal the whole time.  I'm hoping it'll stay that way, at least for the near future.

Eric R.
'86 urq
'92 urS
'93 urS