urS4 clutch pressure

[Ado Sigal]

Without wanting to offend your experience John, the 
physical fact is, the pressure plate spring rate 
never changes throughout its life, until it brakes, 
so any additional pressure needed on the pedal is 
from the resistance in the transfer mechanism, and 
those two reasons mentioned belong to hydraulically 
operated system.
Worn clutch plate only reflect itself on the pedal 
point of engagement, worn plate engaging later than 
less worn ones, again, regarding hydro/op method, 
like on most Audi cars. On self adjusting and 
adjustable operated methods, one can't tell the 
state of the plate at all.
However, my point was that clutch assembly needs to 
get changed on S4 in question, and that should be 
calculated into the price, since it can't be 
remedied without g/box removal, and then it would be 
foolish not to renew everything.

Regards,

Ado

John Larson wrote:

> I'll not get into the whole geometry thing, but I can assure you that
> increased pedal pressure is indeed a symptom of a thin disc.  Having done an
> average of about 2 clutches a month for over 30 years has given me this
> information, which coincides with established industry opinion.  John
> ----- Original Message ----- 
> From: "Ado Sigal" <a.sigal at bluewin.ch>
> To: "John Larson" <j.d.larson at verizon.net>
> Cc: <JCassidy at DiamondConstruction.com>; <quattro at audifans.com>
> Sent: Sunday, March 21, 2004 11:51 AM
> Subject: Re: RE : urS4 clutch pressure
> 
> 
> 
>>Its not the worn clutch, but rather dug in thrust
>>bearing surface and corroded fingers on the pressure
>>plate that cause heavy clutch. No way to get to it
>>on S4, so it must be changed. It happens often in
>>the salt belt aqrea, and cars long standing without
>>use. Make sure that high temp anti seize compound is
>>applied to the p/plate fingers and t/bearing contact
>>surface, when clutch is changed.
>>
>>HTH
>>
>>Ado
>>
>>John Larson wrote:
>>
>>
>>>Worn clutches require noticeably more pedal pressure to get 'em moving.
>>>
>>>HTH, John
>>>_______________________________________________
>>>quattro mailing list
>>>quattro at audifans.com
>>>http://www.audifans.com/mailman/listinfo/quattro
>>>
>>>
>>>
>>
>>
> 
> 
>