Got to stop posting/boasting Was:rear caliper

[james accordino]

I'll try some searches for EPDM o-rings.  I wonder how
Viton would fair in brake fluid?  I could probably
test this, but how long would I have to leave them in
the fluid?  5 years?  15 yrs.?  I'll let you know what
I find with mine.

Jim Accordino

--- Konstantin Bogach <kbogach at comcast.net> wrote:
> James,
> as far as I remember from my research there is no
> questions about
> compatibility of the grease and brake fluid.  They
> must be sealed from
> each other.  The O-ring should be compatible with
> brake fluid and
> grease.  EPDM rubber is only one compatible with
> brake fluids and it is
> not degrades in silicon grease.  But it does in
> regular or synthetic
> grease.  I used it with Valvolin PowerSyntec    and
> now I wait when it
> fails.  By the way, silicon grease gets along well
> with any rubber
> except silicon rubber.  I was not able to find a
> source for EPDM O-rings
> of metric sizes.  If buna-N holds well in brake
> fluid then it will work
> with silicon grease.  The only question how does it
> behave in brake
> fluid?
>
> Konstantin.
>
> james accordino wrote:
>
> > Thanks for the tip.  I was satisfied with the
> service
> > life, about 2 1/2 yrs. and 60k miles, but if it IS
> the
> > o-ring that degraded, then I know I need to change
> to
> > a different grease.  I saw you said you can get
> this
> > lube at Napa.  You also said it's compatible with
> > brake fluid, right?
> >
> > Thanks
> > Jim Accordino
> >
> > --- Konstantin Bogach <kbogach at comcast.net> wrote:
> > > I recommend to use silicon grease next time (
> like
> > > SylGlide).  It is
> > > compatible with all rubbers except silicon
> rubber.
> > > I will not degrade
> > > O-ring and seal.  Plus, it is very good
> protection
> > > from moisture.
> > >
> > > Konstantin.
> > >
> > > james accordino wrote:
> > >
> > > > I'm sure that's a possibility.  I'll let you
> know
> > > when
> > > > I open them up.  Probably over the
> Thanksgiving
> > > break.
> > > >  I think they might just be gunked up.  I'll
> look
> > > at
> > > > the integrity of the o-ring VERY carefully.
> I'll
> > > look
> > > > for swelling, meltdown, whatever.  I don't
> think
> > > the
> > > > type of grease itself was the cause.
> > > >
> > > > Jim Accordino
> > > >
> > > > --- Konstantin Bogach <kbogach at comcast.net>
> wrote:
> > > > > James,  I remember you used regular
> synthetic
> > > gease
> > > > > and buna-N O-ring of standard
> > > > > size.  I wounder if this combination was a
> > > recipe
> > > > > for the failure?  I mean leak of
> > > > > fluid to e-brake cavity.  I am looking
> forward
> > > to
> > > > > see your report on
> > > > > most probable cause of the failure.
> > > > >
> > > > > Konstantin.


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