[DeTomaso] DoT 3 vs. DoT 4 for brakes

[Pantdino]

AFAIK DOT 4 and 3 differ only in boiling point and the degree to which they absorb water--- 4 being better in all regards. I think there must be some old cars out there that must have 3, but the only reason could be that the seals would leak with 4. I have never used 3 and have never had seals leak with any of my cars and I can't imagine anyone has produced  seals that are not compatible with 4 for many years.

Maybe if you had a 1953 Ford with the original brake seals?? :)

Jim Oddie 
 
 
 
-----Original Message-----
From: Mike Thomas <mbefthomas at comcast.net>
To: 'De Tomaso List' <detomaso at poca.com>
Sent: Thu, Apr 2, 2015 7:14 pm
Subject: [DeTomaso] DoT 3 vs. DoT 4 for brakes


I'm scheduled with my local shop to do a pressure bleed / flush of the
brakes
next week, and they asked me to be sure using DoT 4 was not an issue
as that is
all they use.  Haven't seen this thread in quite some time.  What
say
you?

Mike Thomas
Pres., Panteras Northwest
Yellow '74
#6328




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   AFAIK DOT 4 and 3 differ only in boiling point and the degree to which
   they absorb water--- 4 being better in all regards. I think there must
   be some old cars out there that must have 3, but the only reason could
   be that the seals would leak with 4. I have never used 3 and have never
   had seals leak with any of my cars and I can't imagine anyone has
   produced  seals that are not compatible with 4 for many years.



   Maybe if you had a 1953 Ford with the original brake seals?? :)



   Jim Oddie







   -----Original Message-----
   From: Mike Thomas <mbefthomas at comcast.net>
   To: 'De Tomaso List' <detomaso at poca.com>
   Sent: Thu, Apr 2, 2015 7:14 pm
   Subject: [DeTomaso] DoT 3 vs. DoT 4 for brakes
I'm scheduled with my local shop to do a pressure bleed / flush of the
brakes
next week, and they asked me to be sure using DoT 4 was not an issue
as that is
all they use.  Haven't seen this thread in quite some time.  What
say
you?

Mike Thomas
Pres., Panteras Northwest
Yellow '74
#6328




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