<VV> Fwd: Wheel Cylinder Problems--One Answer

[HallGrenn at aol.com]

Thanks for all the responses to my seeping/self repairing wheel  cylinder.  
I will be replacing hoses, honing, flushing and bleeding the  systems again 
just to get everything "by the book" again.  Lee Cramp added  his own 
experience that I thought I would pass along as his problem could be  mine as 
well.
 
Bob Hall
Group Corvair
Corvanatics
CORSA
 
In a message dated 6/12/2011 9:55:19 A.M. Eastern Daylight Time,  
alcramp at msn.com writes:

I used  to used Silicone ( The GE Brand ) in several of the FC's back in 
the  80's.   I had one issue that came up when chaninging over without  all 
new lines, cylinders etc.   

I know you know to get  all of the old stuff out or there can be a 
reaction.  Actually creates an  air bubble , if there is air in the system the 
Silicone rejects the moisture  so it tends to go where the air bubble is instead 
of being absorbed.   Often this is in a low point like the wheel cylinder.   
Can also be  the cylinders getting used to the new fluid.  I ussually lubed 
the cups  up with Sylgluide (availible at my Nappa Store).  This is very 
compatible  and gets the cups a head start.  You can also lube them up with 
the  silicone fluid.  So your intial seep ing went away when the cups got  
lubed by the fluid and softend up a bit.   I would bet on that Vs  rust.  But 
if the hd been older NOS Cylinders it just might have been  that the rubber 
needed a little softening.

In my case the  Silicone fluid reated with a little bit if Glycol in the 
system, or possible  some of the Alcohol i used to flush it out.   I developed 
an air  bubble so that when the brakes warmed up it would voluntrily put on 
the right  front cylinder.  I would have to stop and release the air with 
the  bleeder valve to continue on.   Several good bleedings with the old  
Hard, hard, harder bleeding with a partner and it settled down.  I had  now 
more issues for the next 10 years I drove it.  So my gut feeling  is it needs 
some More bleeding.



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From: "A.L. CRAMP" <alcramp at msn.com>
Subject: Silicone Fluid and other comments
Date: Sun, 12 Jun 2011 09:55:18 -0400
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