Date: Mon, 15 Aug 2011 12:05:55 -0500
Reply-To: Tom Hargrave <thargrav@HIWAAY.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tom Hargrave <thargrav@HIWAAY.NET>
Subject: Re: is this MC rebuild kit for real?
In-Reply-To: <CAJDR84YJJrN4Dee=_PrTY3RyATmXgBtE5o2Rf_wLD9Cr=hkQbg@mail.gmail.com>
Content-Type: text/plain; charset="us-ascii"
For most master cylinders you only need to know the bore size and the shaft
size. What gets replaced are the cup seals & the rear seal and they are a
common design.
The same is true for wheel cylinders - you only need the bore size.
Whether or not a cylinder can be rebuilt depends on the extent of any
corrosion & the final size the bore is honed to after removing the
corrosion. Some are just not rebuildable.
Your problem is probably going to be some corrosion letting fluid bypass one
of the seals until the seal wipes past that spot.
You'll also discover that even in metric cars, most bore sizes are in inch
dimensions.
Thanks, Tom Hargrave
www.stir-plate.com
www.towercooler.com
www.kegkits.com
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Robert Downes
Sent: Monday, August 15, 2011 9:27 AM
To: vanagon@gerry.vanagon.com
Subject: is this MC rebuild kit for real?
first the question, then the story.
i'm searching around for a master cylinder rebuild kit because i know they
exist, and i've never been inside a MC before, and found
this <https://www.rockauto.com/catalog/x,carcode,1286333,parttype,1840>.
i am always skeptical of these all-parts-for-all-cars websites that list
inventory from warehouse indexes, so i invoke the wisdom of the list: if
these are appropriate, why cant i find them anywhere else? if not, does a
kit exist?
AND, why am i planning to get all up in dat MC you ask? well, i rebuilt all
my brakes mechanical-wise about 18 mos/20k miles back and they have never
been perfect. when i hit the brakes fresh, the pedal sinks a bit deeper than
it should, if i push hard it will bottom out(but i can still push harder for
more braking force). if, however, i pump once, release, and then brake, they
feel normal. ...and then after about 5 seconds the pedal falls into the
usual routine.
it has never felt close to dangerous, i have never lost a drop of fluid, the
condition has never worsened.
well, i was recently rotating tires and poking around a bit in prep for an
upcoming round of shop time, and noticed this: my shoes are about gone, and
my pads look like they have not worn at all. is that normal? i remember
buying the higher-end pads, and the rotors tell me that they're doing *
something*, but they've a solid 1/2" of meat left. is this normal? i admit i
only *assume* that it is not. the master cylinder is the last thing more
complicated than a tube that i haven't replaced/renewed, so it's next.
prove me wrong, friends!
-bob
'83 transporter diesel L 1.6TD 5sp--"Kid Cassidy"
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