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Old 03-10-2015, 04:21 PM
 
1,198 posts, read 1,791,339 times
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Sure the bleed is better, but is it that much better?

Kind of a hassle to get to a shop w/my wife's car (long hours, when she's home we are apt to have family time), so I'm thinking of just sucking out the PSF and BF and replacing them, but don't really want to take the tires off if that's overkill.
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Old 03-10-2015, 04:35 PM
 
5,444 posts, read 6,987,107 times
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My thought is by sucking out the fluid and dumping fresh fluid in, you have a chance to add air bubbles into the lines which would have to be bled out anyways.

Also, I guess I'm the type which would rather do a complete job instead of a partial job.
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Old 03-10-2015, 05:06 PM
 
Location: Eastern Washington
17,208 posts, read 57,041,396 times
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Replacing the fluid in the master cylinder only is better than nothing, but does not get at the dirtiest fluid which is typically at the wheel cylinders/calipers.

You need to rotate tires more often than replace brake fluid anyway.

For power steering fluid, generally sucking some out of the reservoir is all you can do short of disassembling the system.

If you get yourself a floor jack, and a good cross-type lug wrench, you won't think taking the road wheels off is such a big deal. I bought a good floor jack in my late teens, I'm still using it in my late 50's.
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Old 03-10-2015, 05:15 PM
 
Location: The Triad
34,088 posts, read 82,920,234 times
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Quote:
Originally Posted by MDrenter223 View Post
Sure the bleed is better, but is it that much better?
Did you just buy a 15yo beater with no known service history and bad fluid?
Then by all means do the mity-vac thing (or have it done).

Otherwise? It's probably overkill.
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Old 03-10-2015, 08:05 PM
 
Location: Riverside Ca
22,146 posts, read 33,503,954 times
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Flush it out. Brake fluid is hydroscopic.
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Old 03-10-2015, 08:58 PM
 
Location: Denver
3,377 posts, read 9,203,461 times
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The fluid should be flushed every two or three years.
Motive Products #1 Selling DIY Brake Bleeder
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Old 03-10-2015, 10:10 PM
 
3,046 posts, read 4,122,758 times
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I have never replaced the brake or PS fluid in any of my cars been driving since I was 15 now I'm 60 and have had over 40 or so cars and trucks in my life never a problem with brakes or PS.
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Old 03-11-2015, 06:52 AM
C8N
 
1,119 posts, read 3,225,391 times
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I did my brake fluid not too long ago.
One thing that was kinda interesting was that the new fluid did not readily mix with the old.
It kinda appeared to just sit on top of the old. I am sure it will mix soon enough but when I saw that, I decided to bleed it out. The brakes feel is so much better now.
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Old 03-11-2015, 07:12 AM
PDD
 
Location: The Sand Hills of NC
8,773 posts, read 18,379,327 times
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Quote:
Originally Posted by Vannort54 View Post
I have never replaced the brake or PS fluid in any of my cars been driving since I was 15 now I'm 60 and have had over 40 or so cars and trucks in my life never a problem with brakes or PS.
Your post belongs right with, I never wear a seat belt, motorcycle helmet.
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Old 03-11-2015, 07:20 AM
PDD
 
Location: The Sand Hills of NC
8,773 posts, read 18,379,327 times
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Quote:
Originally Posted by MDrenter223 View Post
Sure the bleed is better, but is it that much better?

Kind of a hassle to get to a shop w/my wife's car (long hours, when she's home we are apt to have family time), so I'm thinking of just sucking out the PSF and BF and replacing them, but don't really want to take the tires off if that's overkill.
The brake fluid sitting in the MC is not where a problem will happen it's in the wheel cylinders or calipers where the fluid is most contaminated with moisture.

The fluid should be bleed out at a minimum when pads or shoes are replaced.

When I was doing track days every day before an event.
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