995jim
Contributor
Posts: 274
Loc: Ohio
Reg: 12-17-06
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07-18-12 05:11 PM - Post#2249640
My 03 1/2 ton silverado has dirty looking brake line oil when i dumped the calipers a black soot drained out & after bleeding there continues to be black flakes of "stuff" Anybody else run into this problem & or any ideas? I plan on removing oil from reservoir to verify sediment in the reservoir & go from there. Thx Jim
Jim  My wife loves pickup trucks
65' Impala, 65' Belair, 89' Silverado, 98' Silverado, 03' Silverado, 12' Silverado |
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fuzzyff
Forum Newbie
Posts: 45
Loc: CA
Reg: 06-13-12
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07-18-12 07:44 PM - Post#2249698
In response to 995jim
The causes are, at least, the common internal corrosion inherent with aluminum, rubber, steel, cast iron, and the expected water and dust in all the air that we breathe. Add to that the stresses that are encountered with normal, And, heavy duty driving, and, there you are.You didn't say whether you were experiencing any particular out-of-the-ordinary braking performance. My 03 1/2 ton silverado has dirty looking brake line oil when i dumped the calipers a black soot drained out & after bleeding there continues to be black flakes of "stuff" Anybody else run into this problem & or any ideas? I plan on removing oil from reservoir to verify sediment in the reservoir & go from there. Thx Jim
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 wagonman100
Super Senior Member
Posts: 12943
Loc: Baltimore, MD
Reg: 11-27-04
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07-20-12 06:14 PM - Post#2250409
In response to fuzzyff
As stated, it's normal for brake fluid to get gunky after a while. Brake fluid is hydroscopic (absorbs moisture) and is actually recommended to be changed every few years, but it is rarely done.
Jay
Some days it's not worth chewing through the restraints.
1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon |
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 someotherguy
Moderator
Posts: 23388
Age: 43
Loc: Texas
Reg: 08-01-03
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07-21-12 07:25 AM - Post#2250533
In response to wagonman100
You meant "hygroscopic" but you are correct otherwise.  (not trying to dig at you, just correcting an oft-misspelled oddball word.)
Richard
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wagonman100
Super Senior Member
Posts: 12943
Loc: Baltimore, MD
Reg: 11-27-04
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07-21-12 10:34 AM - Post#2250594
In response to someotherguy
You're only correcting an errant finger. I knew the word, just hit the wrong key. Thanks.
Jay
Some days it's not worth chewing through the restraints.
1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon |
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JaVeRo
Member
Posts: 280
Loc: East Texas
Reg: 02-02-06
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07-23-12 06:46 AM - Post#2251128
In response to wagonman100
Every time I do a brake job I siphon the brake reservoir down to nearly nothing with clear tubing to keep from getting any in my mouth, then refill with fresh fluid. Then I bleed the brakes and top off the reservoir again.
James
2003 S10 Blazer 4wd (wife's)
2001 S10 Crew Cab (wife's mail truck)
1996 K1500 (mine)
1979 GMC 3/4 ton 2wd 4spd with a "Gilley's" bumper sticker, my first brand new truck.
2006 K1500 Company Truck
2006 K2500 NV4500 4.10's |
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occupant
Member
Posts: 95
Loc: Wichita Falls, TX
Reg: 07-11-03
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08-08-12 09:07 AM - Post#2257107
In response to JaVeRo
Lube shop told me there is too much copper (5x some artificial limit he probably made up in his head) in my brake fluid and it needs to be flushed for $89.99. He also claims my power steering fluid is shot and for the same price. He was kind enough not to claim my transmission fluid was compromised in any way in a truck with only a few hundred miles on a new Goodwrench transmission.
I'm actually willing to spend the $180ish to get both these services done. Will it be of any value? We'll see. I'd like to see 250-300K out of the truck before I replace it with an 07+ model in a few years. Probably also need brakes front and rear anyway. The PS pump is not complaining at all, but the brakes sure squeal quite a bit when on the pedal (no noise when off the pedal, it's not a wear problem, probably glazed pads and rotors, probably never been cut smooth, probably OUGHT to replace them, probably will get pwnd by the dealer if I take it there for it).
Alan Moore - Wichita Falls, TX
2000 Chevy Suburban LS 4x2, white, 5.3L/4L60E, 179K
2000 Dodge Durango Sport 4x2, gray, 318/44RE, 224K
1995 Olds Cutlass Ciera SL, white, 3.1L/4T60E, 98K
1976 Ford Gran Torino sedan, white, 351C/FMX, 93K |
Edited by occupant on 08-08-12 09:10 AM. Reason for edit: No reason given.
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Bad Bowtie
Senior Member
Posts: 4245
Age: 40
Loc: TX
Reg: 07-04-03
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 08-08-12 10:33 AM - Post#2257139
In response to occupant
I'd do it too.
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Smitty_Chevy
Contributor
Posts: 791
Age: 63
Loc: Atlanta & Yazoo, MS
Reg: 10-29-08
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08-28-12 12:27 PM - Post#2264060
In response to 995jim
"contaminated brake line oil (causes?"
I'd say heat is the biggest contributor to gunky looking brake fluid. It gets hot enough to boil under heavy braking and that cooks it.
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