[DeTomaso] DoT 3 vs. DoT 4 for brakes

[Stephen]

When I buy a car with Dot 3/4 I drain out the fluid, fill the reservoir with 91% isopropyl alcohol, pressure it through the system to clean out the 3/4, then evacuate through each corner with vacuum (the engine makes a great vacuum source).  When dry I refill with Dot 5 and bleed appropriately.  Works like a champ.  

Stephen Nelson


-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Pantdino via DeTomaso
Sent: Saturday, April 04, 2015 2:12 PM
To: shbailey at att.net; detomaso at poca.com
Subject: Re: [DeTomaso] DoT 3 vs. DoT 4 for brakes


That's a whole other discussion.
If you switch to it, technically you should disassemble the entire braking system and clean out the old fluid because whatever non-silicone fluid is in there will have some moisture in it and corrode the system wherever it is.
Also, it tends to trap air bubbles and give a squishy pedal.
 
That said, millions of people use silicone fluid and don't have problems.
 
But its mainly for collector cars where a bit of paint damage below the master cylinder would be catastrophic and they are not driven very hard.
 
 
-----Original Message-----
From: Sam <shbailey at att.net>
To: Detomaso Forum <detomaso at poca.com>
Sent: Sat, Apr 4, 2015 4:50 am
Subject: Re: [DeTomaso] DoT 3 vs. DoT 4 for brakes


I only use a DOT 5 (Silicone) in my non ABS cars including the Pantera.
   Does
not absorb moisture like DOT 3 and 4, does not eat paint, and
   never has
leaked for me.

 
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