Re: Castrol ??

[George Richardson <gprtech@domain.elided>]

I rebuilt the brakes on my Stag last month, and was told the same thing.

It seems that DOT4 fluid will dissolve the natural rubber seals that were
originally used in Brit made brakes right up into the '70s. I doubt very much
that any of the seals used as replacement parts are of the same material, but
since I did not rebuild my master cylinder, I used DOT3 spec fluid. Better safe
than sorry.

On the flip side, I rebuilt everything in my TR3 except the clutch slave, put in
DOT4, and everything is still fine 6 months later.

DLMAssoc@domain.elided wrote:

> Hello all...
>
> This week I've been rebuilding the front brakes on my "new" '72 Stag, and
> both times I've ordered parts I've been reminded to use only Castrol brake
> fluid.  Otherwise, bad things will happen to the rubber stuff.
>
> I've had lots of TR 3s and 4s over the past 30 years and have never had a
> brake fluid caused problem that I'm aware of.  I'm pretty sure that I've
> never used Castrol during that time, especially since it would probably have
> cost a little more than whatever else was available at the discount auto
> place, 7-11, or whatever.
>
> Is there anything about the Stag parts that can be hurt by NAPA brand Dot4
> brake fluid?
>
> Thanks...
> Don Marshall
> '57 TR3  '63 TR3B  '63 TR4  '67 TR4A  '72 Stag
>

--
George Richardson
The Wyvern - '57 TR3, TS15559L - http://www.merlingroupinc.com/tr3.htm
The Hippogrif - '71 Stag MKI, LE8176E - soon to get a site of it's own