DOT 5

["Scruggs, Gross" <GScruggs@monterey.nps.navy.mil>]

Todd, I certainly acknowledge the theory but is a slight stretch to imagine
our systems are sufficiently 'porous' for that to really happen.  It would
be instructive, though, to open up some several-year old systems that had
only used DOT 5 and see if there had been any moisture intrusion and damage.


Wonder what one would use to flush a brake system that itself would not
become a problem?

Thanks for your observations.

Regards, Gross



	-----Original Message-----
	From:	Todd Candey [SMTP:tcandey@wans.net]
	Sent:	Wednesday, April 14, 1999 1:16 PM
	To:	Scruggs, Gross
	Cc:	 
	Subject:	Re: Regarding DOT 5

	> On the very positive side, however, DOT 5 will not absorb water..
	> non-hygroscopic is the traditional term, although Bob Myers tells
me that
	> use of 'non-hydroscopic' is seeing increased usage.  By not
absorbing
	> moisture it is an ideal fluid for brake systems which are either
seldom used
	> or never stressed by high heat.

	Yes but...
	There is one bad thing about DOT5 not absorbing mosture.When small
amounts of
	water make there way into the brake system, through changes in
humidity caused
	by rapid heating and cooling or living in areas where rain is very
prevelant,
	the fluid will not absorb this water and small pockets of
condensation will form
	in the lines, calipers, etc. This can lead to problems of the
caliper failure
	nature as well as poor pedal feel and a loss of performance.
	Can this be solved by routinely flushing the system, of course, but
who
	routinely does it?

	Todd Candey
	Motul Racing Brake fliud 600, DOT4 in all of our cars, and never a
problem.