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Re: DOT3 or DOT4

To: mckillnm@unix2.tcd.ie (Marky Mark)
Subject: Re: DOT3 or DOT4
From: pwcs.StPaul.GOV!phile@medtron.medtronic.COM (Philip J Ethier)
Date: Tue, 21 Apr 92 15:52:42 CDT
mckillnm@unix2.tcd.ie asks \

\What is the diffrence between DOT3 and 4

Never put DOT 3 in a British car.  You can wreck all the seals.  Use DOT 4,
specifically Castrol GT LMA.  It bleeds the bubbles out well.  It does take on 
water, but if you change it according to your use, it will give you good 
performance, hard pedal.  It will eat your paint for breakfast, so be careful.

\can they be mixed, what happens? 

Flush all the DOT 3 out of the system, replace with Castrol GT LMA.  Use an 
Eezeebleed to pressure bleed the system.

\What is this DOT 5 stuff ????? Si based,

Silicone, not silicon.  This stuff does not take on water, so it is ideal for 
maintaining the brake systems on "Parade and Show" cars that may occasionally 
be driven for pleasure, not competition.

\is it better for the high temp running ?

In theory.  In practice, you cannot get all the damned tiny air bubbles out of 
it.  They expand under heat and make things altogether too exciting.

\Does it "eat" into paint ?

Nope, silicone brake fluid seems to be pretty much inert.  Long-term storage,
it is the best bet.

Phil Ethier, THE RIGHT LINE, 672 Orleans Street, Saint Paul, MN  55107-2676
h (612) 224-3105     lotus@pnet51.orb.mn.org
w (612) 298-5324     phile@pwcs.stpaul.gov  (list goes here)
"The workingman's GT-40" - Anthony Colin Bruce Chapman

-- 
Login name: phile                       In real life: Philip J Ethier
Phone: 298-5324


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