If you're restoration includes a new paint job, then save yourself the
inevitable heartache later and switch to DOT 5 which will not eat your paint
the way DOT 4 will. I converted my brakes to DOT 5 in January of this year
and drive the car regularly. I love the stuff. I've never heard of any
sealing problems with DOT 5. Furthermore, DOT 5 will prevent corrosion in
the brake lines since it does not absorb moisture the way that glycol based
DOT 4 will.
Of course, DOT 4 is the original spec, so if you feel that fact is important
enough to stay with it, then so be it. I'm still running DOT 4 in my
clutch, but as soon as I need to rebuild it eventually or get new paint
(whichever comes first), I'll be switching that one to DOT 5 silicone, too!
Best wishes,
Jeff in San Diego
'67 RHD Spitfire Mk3 aka "Mrs. Jones"
'68 LHD Spitfire Mk3 frame-off resto project
Visit The Totally Triumph Garage forums -- moderated, focused, friendly!
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
----- Original Message -----
From: Ron Deaver <rrdeaver@emagichappens.com>
To: <spitfires@autox.team.net>
Sent: Friday, October 13, 2000 11:36 PM
Subject: Silicone Brake Fluid vs DOT4
>
> Part of my 80 Spit restoration is a total rebuild of the brake
> system. Normally I would switch to Silicone when replacing all
> calipers/cylinders and hoses (moving to stainless steel lines), the local
> shop pushed strongly to stay with Castrol DOT4 LMA, as silicone has
smaller
> molecules and is more prone to seal problems. I will be replacing the
> Master Cylinder as well. Previous owner rebuilt it, but it does lose
> pressure here and there (similar to the recent thread on Master Cylinders
/
> Brake Problems). I am just replacing it with a rebuilt rather than
rebuild
> it a second time.
>
> What is the general consensus and advice for one new to Spitfires? All
> advice is greatly appreciated.
>
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