Master Cylinder - WTF?

[jdbubb at verizon.net (Dan Bubb)]

Well, just to throw in my >.02.
I went through the same thing when installing a new MC on my Scirocco. In the end the MC was replaced under warranty and I bought a power bleeder and never had any problem after that.
The assumption was that even a new MC can be damaged stroking it full stroke like you would if you were bleeding the old fashioned way.
In your situation the first thing I'd do is run over to Ron's and borrow his power bleeder. ;^)
If that doesn't do it then I'd see if the MC can be replaced under warranty.
Needless to say the power bleeder is a life saver if you have A3 rear calipers that have to be mounted with the bleeder screw on the bottom. It's still a damn good investment for just about any other bleeding situation.
Dan

From: "Daun Yeagley" <vwdaun@yahoo.com>
To: <scirocco-l@scirocco.org>
Sent: Wednesday, March 28, 2007 11:31 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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