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Break Fluid??! #4585915
11/26/17 06:27 PM
11/26/17 06:27 PM
Joined: Feb 2016
Posts: 520
GA
miden851 Offline OP
miden851  Offline OP
Joined: Feb 2016
Posts: 520
GA
My old car calls for DOT 4; I was wondering how important is the replacement for you and how many of you keep up with maintenance of the fluid;

On the note, I replaced mine today after many, many miles, and little or if any difference in braking power IMO








Last edited by miden851; 11/26/17 06:32 PM.

2008 Mazda6i GT; @202K miles
2016 Honda CR-V EX-L; @33K miles
Re: Break Fluid??! [Re: miden851] #4585926
11/26/17 06:41 PM
11/26/17 06:41 PM
Joined: Dec 2014
Posts: 1,671
'murica
Ethan1 Offline
Ethan1  Offline
Joined: Dec 2014
Posts: 1,671
'murica
You can't break a fluid

Re: Break Fluid??! [Re: miden851] #4585928
11/26/17 06:43 PM
11/26/17 06:43 PM
Joined: Aug 2016
Posts: 654
New Jersey
THafeez Offline
THafeez  Offline
Joined: Aug 2016
Posts: 654
New Jersey
My favorite fluid on breaks is water you should try it


2004 Toyota Solara SE 2.4 2AZFE
182,000 miles
Castrol Magnatec Semi-Syn 5W30
Royal Purple 20-400 oversize 2nd run
Re: Break Fluid??! [Re: miden851] #4585935
11/26/17 06:48 PM
11/26/17 06:48 PM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
I have been saying it for years (but no one will listen) that a well designed brake system will keep the fluid dry. Furthermore, even if water gets in the fluid, unless your in the mountains or towing, your not going to boil the fluid. I never bleed my brakes yet have never replaced a caliper. Go figure.

Re: Break Fluid??! [Re: miden851] #4585937
11/26/17 06:49 PM
11/26/17 06:49 PM
Joined: Mar 2013
Posts: 4,767
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,767
The Midwest

It's important and I keep up with replacement.

I was a mechanic at a Honda dealer eons ago before more education and eventually becoming a UPS semi mechanic.
Don't be disappointed your brakes don't feel better. I've worked on my share of vehicles where the brake fluid was never changed and caused expensive repairs.
Brake fluid accumulates moisture over time. Brake fluid is cheap. Replacing an ABS pump is not. Losing your brakes away from home is no fun either.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Break Fluid??! [Re: miden851] #4585940
11/26/17 06:53 PM
11/26/17 06:53 PM
Joined: Mar 2008
Posts: 6,824
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,824
USA
I replace the brake fluid when replacing pads and rotors.

Re: Break Fluid??! [Re: philipp10] #4585942
11/26/17 06:53 PM
11/26/17 06:53 PM
Joined: Mar 2013
Posts: 4,767
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,767
The Midwest
Originally Posted By: philipp10
I have been saying it for years (but no one will listen) that a well designed brake system will keep the fluid dry. Furthermore, even if water gets in the fluid, unless your in the mountains or towing, your not going to boil the fluid. I never bleed my brakes yet have never replaced a caliper. Go figure.


Explain how brake fluid gets dark over time.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Break Fluid??! [Re: philipp10] #4585959
11/26/17 07:08 PM
11/26/17 07:08 PM
Joined: Mar 2012
Posts: 1,278
San Antonio, TX
E150GT Offline
E150GT  Offline
Joined: Mar 2012
Posts: 1,278
San Antonio, TX
Originally Posted By: philipp10
I have been saying it for years (but no one will listen) that a well designed brake system will keep the fluid dry. Furthermore, even if water gets in the fluid, unless your in the mountains or towing, your not going to boil the fluid. I never bleed my brakes yet have never replaced a caliper. Go figure.

If you keep your car for only a few years this is correct. Why change it? If you keep it for a long time, change it regularly. Your brake system corrodes from within and you canít see it and one day it will fail you. Mine did and luckily I was in a parking lot. I would have been in deep kimchi had I been on the highway.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Break Fluid??! [Re: miden851] #4585961
11/26/17 07:09 PM
11/26/17 07:09 PM
Joined: Oct 2012
Posts: 4,622
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,622
Taiwan
Old brake fluid can break brakes.


Re: Break Fluid??! [Re: miden851] #4585965
11/26/17 07:13 PM
11/26/17 07:13 PM
Joined: Sep 2005
Posts: 5,679
MIchigan
Warstud Offline
Warstud  Offline
Joined: Sep 2005
Posts: 5,679
MIchigan
It's just like any other fluid. It degrades and gets contaminated over time. Just change it and feel good about it.
BTW: It gets dark from the rubber lines.

Re: Break Fluid??! [Re: miden851] #4585972
11/26/17 07:19 PM
11/26/17 07:19 PM
Joined: Oct 2012
Posts: 4,622
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,622
Taiwan
Originally Posted By: miden851
My old car calls for DOT 4; I was wondering how important is the replacement for you and how many of you keep up with maintenance of the fluid;

On the note, I replaced mine today after many, many miles, and little or if any difference in braking power IMO





You won't notice any difference in "braking power" (whatever that is meant to mean). As long as the brake fluid is a liquid, it'll work right up until it isn't.

Then it won't.

Water would work as a brake fluid, until it didn't

If (as is likely) old brake fluid caused corrosion in the system, you MIGHT notice some deterioration in function (sticking pistons, for example) prior to (possibly catastophic) failure.

Re: Break Fluid??! [Re: miden851] #4585975
11/26/17 07:26 PM
11/26/17 07:26 PM
Joined: Sep 2010
Posts: 7,560
SE Texas
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,560
SE Texas
Brake fluid is hygroscopic and absorbs water from the air and once absorbed, it cannot be separated. I change mine every 3-4 years, not a major expense and it keeps the system fresh and working well.


2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU
Re: Break Fluid??! [Re: 2015_PSD] #4586003
11/26/17 07:58 PM
11/26/17 07:58 PM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,804
Central Washington
Originally Posted By: 2015_PSD
Brake fluid is hygroscopic and absorbs water from the air and once absorbed, it cannot be separated. I change mine every 3-4 years, not a major expense and it keeps the system fresh and working well.

Right. I do about 2 years which might be overly cautious but I like to keep it fresh.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Break Fluid??! [Re: skyactiv] #4586007
11/26/17 08:04 PM
11/26/17 08:04 PM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
Dark? More than likely that is seal material. Seals are black.

Re: Break Fluid??! [Re: E150GT] #4586009
11/26/17 08:06 PM
11/26/17 08:06 PM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
Originally Posted By: E150GT
Originally Posted By: philipp10
I have been saying it for years (but no one will listen) that a well designed brake system will keep the fluid dry. Furthermore, even if water gets in the fluid, unless your in the mountains or towing, your not going to boil the fluid. I never bleed my brakes yet have never replaced a caliper. Go figure.

If you keep your car for only a few years this is correct. Why change it? If you keep it for a long time, change it regularly. Your brake system corrodes from within and you canít see it and one day it will fail you. Mine did and luckily I was in a parking lot. I would have been in deep kimchi had I been on the highway.


I have always drove my cars 12-14 years....

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