Master Cylinder - WTF?

[lord_verminaard at yahoo.com (Brendan Doyle)]

Silly question - was the new master pre-bled or "bench bled"?  I've heard that helps the process.  When I did the clutch master cylinder in my Camaro, it took a week straight and 3 liters of brake fluid of constant bleeding before I said "F" it and got a Mityvac and finished the job in 10 minutes.  It might just be stubborn, sometimes getting the initial fluid flow started takes the longest.  Mityvacs are pretty cheap, and they have a million and one uses as well.  Not as simple as the power bleeders but better than the pump and twist method.  (ok that sounded bad!)

Good luck!
Brendan
84 Scirocco 8v <-- TDI in progress
01 Jeep TJ 4.0


----- Original Message ----
From: Daun Yeagley <vwdaun@yahoo.com>
To: scirocco-l@scirocco.org
Sent: Wednesday, March 28, 2007 10:31:30 PM
Subject: Master Cylinder - WTF?

As some of you may know, I just installed a new master
cylinder on Deiter, the '81 S.  It seems as though the old
one was leaking fluid into the brake booster.  And yes, I
replaced the brake booster with an unknown quantity used
booster.  (Can't seem to get a new one now.)

First attempt at bleeding the brakes resulted in the
semi-expected snapped bleeder screws in the rear, so I
replaced both wheel cylinders this evening.

Filled the brake fluid reservoir and started at the right
rear wheel to work the air out of the system.  I don't have
a pressure bleeder, so I'm stuck with the old "someone pump
the pedal while I turn the bleeder screw" routine.  After
working my way around the car, I still have a brake pedal
that shows no real resistance to going to the floor, AND it
seems to have a "catch" in it about 2/3 of the way down. 
(Which was present when I started.)

So now what?  Have I done something wrong here?

Daun Yeagley - Wilmington Ohio
'81 Scirocco S (Deiter)       '86 Scirocco 8v
'88 Scirocco Slegato (Gino!)  '88 Scirocco 16v
'96 Passat GLX Wagon          '56 Cessna 172
The first rule of intelligent tinkering is to save all the parts - Ehrlich's Law.



 
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