I agree that replacing your master cylinder is a good time to flush your brake system, and I still pull fluid through all 4 wheel cylinders until it's clear if the system has not been bled in 2 years. The advantage is you aren't pumping air bubbles through e entire system.

And BTW, you should replace your fluid with DOT-4. It's 100% compatible with DOT-3 and less hygroscopic - it absorbs less moisture from the air.

Thanks, Tom Hargrave
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-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Jim. Felder
Sent: Wednesday, March 16, 2022 5:14 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Brake master cylinder weep

That’s a good idea. I will try it next time. I’m a little concerned about the residual brake fluid in the line, though, that could theoretically never get moved out.

Jim

On Wed, Mar 16, 2022 at 5:10 PM Tom Hargrave <thargrav@hiwaay.net> wrote:

> I use a pressure bleeder but bleeding by hand works just as well. It 
> just takes a little longer.
>
> But try bleeding by cracking open the line fittings at the master 
> cylinder first. Sometimes you get lucky and purge out all the air 
> there and then you don't have to go from wheel to wheel.
>
> Thanks, Tom Hargrave
> www.kegkits.com – Electric Brewery Info www.towercooler.com – Beer 
> Tower Cooler http://goo.gl/niRzVw - My Amazon Store 
> www.brew-control.com – Electric Brewery Marketing and Direct Sales 
> http://www.hackpilot.com/roadkill/ - A little twisted humor
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On 
> Behalf Of Tom C
> Sent: Wednesday, March 16, 2022 2:43 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Brake master cylinder weep
>
> Thank gentlemen! That’s what I figured. Do you all have a bench 
> bleeder you prefer or should I just use my motive power bleeder?
>
> On Wed, Mar 16, 2022 at 3:19 PM Tom Hargrave <thargrav@hiwaay.net> wrote:
>
> > The lip seal at the rear of your master cylinder is failing and you 
> > need to replace your master cylinder now verses later.
> >
> > The risk is the leak will get worse, you will lose too much brake 
> > fluid and your brakes will fail. But it's a common service part.
> >
> > Thanks, Tom Hargrave
> > www.kegkits.com – Electric Brewery Info www.towercooler.com – Beer 
> > Tower Cooler http://goo.gl/niRzVw - My Amazon Store 
> > www.brew-control.com – Electric Brewery Marketing and Direct Sales 
> > http://www.hackpilot.com/roadkill/ - A little twisted humor
> >
> >
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On 
> > Behalf Of Tom C
> > Sent: Wednesday, March 16, 2022 12:25 PM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Brake master cylinder weep
> >
> > Hey Guys,
> >
> > I think my brake master cylinder has a slight weep. It’s not visibly 
> > leaking anywhere it just looks slightly wet we’re it bolts into the 
> > booster and it seems like it’s very slowly and gradually making its 
> > way down the booster onto the wires and then a little drip. What do 
> > you guys think?  Any advice would be greatly appreciated. Thanks tom
> > -----
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> >
> >
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
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>
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7924 / Virus Database: 4793/15886 - Release Date: 08/14/18 Internal Virus Database is out of date.