RE: [Chrysler300] Dot 3 / Dot 5

["Bob Jasinski" <rpjasin@xxxxxxxxxxx>]

Herb,

 

We've been down this road before, but for the sake of balance I would like
to respond to the points you've made based on my experience:

 

<Again if you do proper maintenance you WILL NOT have a problem!!>

 

In a perfect world that all I had to do was schedule brake bleeding sessions
every two years, that would be the case, but that is not reality in my life.
I own a number of cars, all requiring maintenance of some type at any one
point in time.  Bleeding brakes is NOT a simple one man job, it is a lot of
work, even with a lift as I have. The longer I can do without the need, the
better.  Some years I only put 800 to 1000 miles on my 300G.  That would
require brake bleeding as often as an oil change.  Also, more frequent brake
fluid changes means more possibility of SPILLING DOT3/4 brake fluid on
painted surfaces, causing damage.

 

<By the way the same moisture that is in DOT 3-4 is in DOT 5 it just sinks
to the lowest point and sits there as opposed to DOT 3-4 that holds it in
suspension and is gone when you bleed your brakes. Not sitting at the low
spots unable to be bleed out like as with DOT 5>

 

Sorry, but this is not true.  DOT 5 does NOT absorb the same amount of
moisture in the system as does DOT3/4, as they are hygroscopic (attract
moisture) DOT 5 is not hygroscopic.  Over many years, moisture can
accumulate in a DOT 5 system, but it is at a much slower rate.  It does form
in the lowest point, but that is flushed when the brakes are bled, just as
it would with DOT 3/4.  The difference though, is that you can wait MUCH
longer to bleed the brakes.  I do mine about every 8 years.

 

<Is there anything wrong with DOT 5, NO, other than the silicone impregnates
all
rubber parts and creates a mess if you want to switch back>

 

I have not seen any evidence of permanent contamination of brake parts
caused by silicon fluid.  

 

< Today's DOT 4 has just short of the same boiling quality's as DOT 5>

 

True, but that is when it is fresh.  The boiling point begins to drop once
it is installed due to the hygroscopic nature of DOT 3/4.  The silicon fluid
boiling point remains much more constant through its life.

 

A good alternative to silicon fluid is Castrol DOT 4 LMA (low moisture
activity) fluid.  It has a high boiling point, BUT it still melts paint. In
collector cars like ours, that is a MAJOR drawback.

 

Bob J

 

 

 

 

 

 

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Herb
Sent: Sunday, February 06, 2011 6:43 PM
To: Chrysler 300 List
Subject: Re: [Chrysler300] Dot 3 / Dot 5

 

  

Again if you do proper maintenance you WILL NOT have a problem!! By the way
the same moisture that is in DOT 3-4 is in DOT 5 it just sinks to the lowest
point and sits there as opposed to DOT 3-4 that holds it in suspension and
is gone when you bleed your brakes. Not sitting at the low spots unable to
be bleed out like as with DOT 5. Another post talked of the boiling point
of DOT 3-4 over DOT 5. Todays DOT 4 has just short of the same boiling
quality's as DOT 5. To address the boiling, unless he is racing on a track
his problem is unrelated to fluid!! If your brakes are getting so hot that
your boiling fluid you need to find a real mechanic to do your brakes
because quite frankly whom ever did them knows not what they are doing. 
Bottom line, the perceived benefits from DOT 5 are just not there in a
street car in the lower 48 or lower 55 states, if your a fan of mr obama. I
have many years of experience with both fluids, and have never been
convinced that the added expense reaped any justifiable benefit. Is there
any thing wrong with DOT 5, NO, other than the silicone impregnates all
rubber parts and creates a mess if you want to switch back. Is there any
thing wrong with DOT 3 or 4, NO, if you change it like your supposed to
during normal preventative maintenance! Brakes are like transmissions out
of sight out of mind until there is a problem. Then we try to find
something to blame, other than our selves, and what is the easiest thing? 
Fluid! That is why there is such an after market for wonder fluids!! All
stemmed from personal denial. Why do you have sludge in your engine? You
did not change your fluid! Why do you have a burned up transmission? You
did not change your fluid! Why do you have rusted brake components & lines?
You did not change your fluid! SO, Pay now and change your fluids or Pay
more latter!



-------Original Message-------

From: mgoodknight@xxxxxxxx <mailto:mgoodknight%40juno.com> 
Date: 2/4/2011 7:14:40 PM
To: zephyr9900@xxxxxxxxxxx <mailto:zephyr9900%40hotmail.com> 
Cc: 2HsandaHeritage@xxxxxxxxxxx <mailto:2HsandaHeritage%40comcast.net> ;
chrysler300@xxxxxxxxxxxxxxx <mailto:chrysler300%40yahoogroups.com> 
Subject: Re: [Chrysler300] Dot 3 / Dot 5

If you haven't lived in Florida or other damp coastal areas it might be
difficult to appreciate the deficiencies of Dot 3 for use in "occasionally
used" vehicles.
---------------Marshall



---------- Original Message ----------
From: Herb <zephyr9900@xxxxxxxxxxx <mailto:zephyr9900%40hotmail.com> >
To: <2HsandaHeritage@xxxxxxxxxxx <mailto:2HsandaHeritage%40comcast.net> >,
"Chrysler 300 List"
<chrysler300@xxxxxxxxxxxxxxx <mailto:chrysler300%40yahoogroups.com> >
Subject: Re: [Chrysler300] Dot 3 / Dot 5
Date: Fri, 4 Feb 2011 15:47:20 -0600


DOT 5, WHY????? Please send your extra unneeded money to me, I sure can use
it on my 300H!! Use DOT 4 and save your time and money, there is NO
advantage to DOT 5 in Fair Oaks, CA! Now if you lived in Fair Banks, Alaska
, maybe a slim chance. Just change the fluid every 30,000 miles with DOT4
as your supposed to, and you will never have a fluid problem.




-------Original Message-------

From: 2HsandaHeritage@xxxxxxxxxxx <mailto:2HsandaHeritage%40comcast.net> 
Date: 2/4/2011 10:51:28 AM
To: Chrysler 300 Club International
Subject: [Chrysler300] Dot 3 / Dot 5




Hi Group, 

The rear brake assemblies on my new 300 Sport are severely corroded due to
leaking wheel cylinders and long storage. 

I have decided to switch from Dot 3 to Dot 5 brake fluid. 

My procedure will be to remove all wheel cylinders and hoses, remove ,
disassemble and clean the master cylinder, blow out the steel tubing with
compressed air and flush the tubing with a solvent. 

I will then install new wheel cylinders and hoses, add Dot 5 and bleed the
system. 

Any comments or suggestions on this procedure? 

What should I use to flush the steel tubing? 

Thank in advance, 

Doug Warrener 

Fair Oaks, CA 

300H 

300 Sport Conv. 



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