Brake question...

[joshhignight@techography.net (joshhignight@techography.net)]

Cathy,

I recently rebuilt one of my prop valves using the bad 16v=
 version, and a couple old 8v versions. The differences are the=
 springs, nozzle and such inside. The housings (and o-rings) are=
 the same. I couldn't find a properly fitting o-ring in the=
 stores, hence me scavanging the 8v parts. One thing I realized=
 is that the o-ring really needs to be seated down into the=
 female part of the housing between the tow havles, not on the=
 outside. If you try to tighten the housings together and not=
 worry about the o-ring being squished into the female part when=
 you tighten, it will just pop out and not seal anything. I found=
 that by lubricating the ring and the housings with brake fluid=
 and very carefully and slowly tightening things down i was able=
 to get the o-ring to seat properly between the two halves. It's=
 a bit of a bear, but it will work. When done, you should barely=
 see the o-ring sitting in the gap between the two halves (it'll=
 be sunk down between them). 

Most common problem when putting things back together is to get=
 the o-ring almost right, then a little portion pops out, and you=
 have to start over. This is where the brake fluid helps, so the=
 ring doesn't catch on the housing.

HTH's.

Joshua







 --__--__--

Message: 18
Date: Sat, 29 Mar 2003 12:58:57 -0500 (EST)
From: Drew MacPherson 
To: Cathy Boyko 
Cc: Scirocco-L@scirocco.org
Subject: Re: Brake question, no tassles.


Cathy, the o-rings aren't available from VW as separate parts.=
 having 
said that, if you can match up a replacement part (which will be=
 
challenging from the ring that has split, because it will also=
 likely be 
stretched) you should be able to replace them. Many auto parts=
 stores 
sell o-ring kits that include common metric/imperial o-ring=
 sizes, or they 
may sell individual rings.

I have a similar problem - one of my pressure regulators has been=
 seeping 
brake fluid for some time - just enough to make the regulator=
 damp, but 
not enough that the level of brake fluid has gone done=
 significantly. I 
hope to replace the offending regulator with a spare before the=
 spring 
season starts.

Drew