Date: Wed, 14 Apr 2021 17:41:56 -0400
Reply-To: Steven Shelton <shelton4@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Steven Shelton <shelton4@GMAIL.COM>
Subject: Re: Brake Caliper Question
In-Reply-To: <CY4PR0801MB37311B82291DC6F5BB669F8FA04E9@CY4PR0801MB3731.namprd08.prod.outlook.com>
Content-Type: text/plain; charset="UTF-8"
Boy, I had just finished mounting and bleeding the caliper, came in and
checked my email to discover that I was in the wrong Bentley section. Weird
how after hours of videos and many pages of forum discussions, Bentley has
something I didn't find. Wish I read about "VW brake cylinder paste." Oh
well, a quick search online came up empty for VW specific brake cylinder
paste. I used brake fluid, as recommended by most online videos.
That bottom bleeder is called a drain screw in Bentley. My fluid has been
flushed regularly over many years, so not sure I would need to drain it.
Over two liters of brake fluid to do the job according to Bentley!
I didn't split the housing, so could not try penetrating fluid from the
inside to get at the "drain screw."
On Wed, Apr 14, 2021 at 5:01 PM Dennis Haynes <d23haynes57@hotmail.com>
wrote:
> Calipers generally get serviced or "rebuilt" due to leaking or sticking,
> getting stuck. Leaking is due to age of the end seal or heat damage and
> then corrosion at the top of the piston. Sticking is almost always due to
> corrosion or debris between the piston and caliper wall. The corrosion can
> be from moisture and road stuff getting in from the dust boot and the brake
> fluid absorbing enough moisture to rust the caliper bore from below. Often
> things are OK until the pistons get pushed back during pad replacement.
> Good practice is to open the bleeders when pushing the pistons back so any
> debris doesn't get pushed back into the master.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Neil
> Sent: Wednesday, April 14, 2021 1:53 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Brake Caliper Question
>
> The Bentley manual has instructions for "bleeding" and "changing" the
> brake fluid. The table shown in "changing" section shows use of lower bleed
> screws.
>
> With the callipers opened up, maybe good quality penetrating fluid would
> reach the bleed screw threads from the inside?
>
> Neil.
>
> On 4/14/21, Steven Shelton <shelton4@gmail.com> wrote:
>
> > I'm rebuilding the ATE calipers on my 1985. I've never understood why
> > there are two bleeders. It makes sense to bleed from the top of the
> > caliper, but why is there a bleeder at the bottom? Is there something
> > I need to do now that I've drained the fluid out of the caliper? I'm
> > reluctant to do anything with it since it's never been opened. If it
> snaps off . . . .
> >
>
>
> --
> Neil n
>
> VE7TBN
>
> 1988 Westy 50º ABA swap:
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftinyurl.com%2Fyap5hpwt&data=04%7C01%7C%7C0ff4ffe9eff24a193e2508d8ff6e1c5d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637540195675349565%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=KCX5pjXFUi34%2FCyEVc2yt4y%2Bpk4K1Gw4VAjpHDPshck%3D&reserved=0
>
> 1981 Westy 15º ABA swap:
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftinyurl.com%2Fy9n4xob8&data=04%7C01%7C%7C0ff4ffe9eff24a193e2508d8ff6e1c5d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637540195675349565%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Upff7ePEJh5VqmOxIl12AIky9gclYW5l1gHab6EGYts%3D&reserved=0
>
> VAG Gas Engine Swap Group <
> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Ftinyurl.com%2Fkhalbay&data=04%7C01%7C%7C0ff4ffe9eff24a193e2508d8ff6e1c5d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637540195675349565%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=4ySXt7ct2U4DbXOZVPpkYa1iXAy3mx%2FjnJoKfNgPBmc%3D&reserved=0
> >
>
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