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Re: Brake Fliud Gone Where?????
[Re: okie]
#796043
09/08/10 03:59 PM
09/08/10 03:59 PM
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Joined: Jan 2003
Posts: 75,092
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JohnRR
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Quote:
It's non power brakes and I checked the inside of the master cylinder and it is dry. I checked the outside of the master cylinder and it is dry too. Could it have had air in it and just bled back into the master cylinder? Ronnie
Look on the firewall INSIDE the car , brake fluid doesn't mysteriously evaporate. You either have a HUGE leak which you would see under the car or it's under your carpet .
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796045
09/08/10 05:47 PM
09/08/10 05:47 PM
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Joined: Jan 2003
Posts: 2,636
Nashville, TN
MOPARMIKE69
master
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master
Joined: Jan 2003
Posts: 2,636
Nashville, TN
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It wasn't full to begin with or you are missing a mighty big puddle
69 Road Runner vert
69 GTX hard top
70 Road Runner 4 speed
70 Hemi Cuda vert
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Re: Brake Fliud Gone Where?????
[Re: Pyper70]
#796049
09/08/10 07:07 PM
09/08/10 07:07 PM
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Joined: May 2003
Posts: 3,119
N.W. Florida
Fat_Mike
master
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master
Joined: May 2003
Posts: 3,119
N.W. Florida
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Quote:
Quote:
Maybe they weren't bled right in the 1st place, air in lines  Bleed the brakes again, then top off the m/c, and see what happens.
I'll go with this one...You had air in the lines.....the air bled upwards and the fluid drained down to fill the void of the air-pockets.
I have a difficult time believing you wouldn't miss the lack of braking power with that much air in the lines. But as was said above, it didn't evaporate.
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796057
09/08/10 10:00 PM
09/08/10 10:00 PM
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Joined: Jan 2003
Posts: 75,092
A Banana Republic near you.
JohnRR
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I Win
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Quote:
The lines don't go thru the frame any where. It had a good peddle for several days and didn't just happen all at once. I could feel the peddle changing a little each day not much but some. I'm hoping it just had some air in the system and it worked it's way out. Ronnie
Does your car have the torsion bar crossmember DELETE option ?
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Re: Brake Fliud Gone Where?????
[Re: JohnRR]
#796058
09/08/10 10:03 PM
09/08/10 10:03 PM
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Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
Posts: 1,216
Under My Car
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Quote:
I'm hoping it just had some air in the system and it worked it's way out.
It would be difficult for the air to work it's way out of a sealed system. I'm guessing there is a leak somewhere you just have to find it.
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796062
09/09/10 01:54 PM
09/09/10 01:54 PM
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Joined: Jan 2003
Posts: 75,092
A Banana Republic near you.
JohnRR
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Quote:
I might have found it, the cap on the master cylinder isn't sealing good. I don't guess the chinese can't make a good rubber seal. I'm going to NAPA in a little while and see what they are going to do about it. This has to be it because there is no other leaks any where. Ronnie
That will only cause a leak when you apply the brakes , just sitting it will not leak ...
unless you installed it upside down ... kidding ...
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Re: Brake Fliud Gone Where?????
[Re: Pyper70]
#796064
09/09/10 03:07 PM
09/09/10 03:07 PM
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Joined: Jan 2005
Posts: 1,222
okla.
okie
OP
pro stock
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OP
pro stock
Joined: Jan 2005
Posts: 1,222
okla.
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The block isn't leaking. After I pump them up you can find fluid on the bottom of the master cylinder. There isn't any fluid on the inside are out side of the master cylinder on the fire wall. I had drove the car for several days before it ran out of fluid. I have a new 1 coming in the morning so I'll change it out and see if that will fix it. Ronnie
Last edited by okie; 09/09/10 03:08 PM.
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796065
09/09/10 05:52 PM
09/09/10 05:52 PM
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Joined: Jan 2003
Posts: 5,907
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,907
Athens, Greece
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Look for missing paint. Brake fluid is very corrosive when it comes in contact with paint. If your master was leaking, your inner fender wells would have alot of discoloration / flaking
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796066
09/09/10 06:18 PM
09/09/10 06:18 PM
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Joined: Jan 2003
Posts: 2,757
Gilbertsville, PA 19525
Pntastar69
master
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master
Joined: Jan 2003
Posts: 2,757
Gilbertsville, PA 19525
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Quote:
After I pump them up you can find fluid on the bottom of the master cylinder. There isn't any fluid on the inside are out side of the master cylinder on the fire wall. Ronnie
Having a hard time following ya on this one.
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Re: Brake Fliud Gone Where?????
[Re: 70sixpkrt]
#796070
09/09/10 09:39 PM
09/09/10 09:39 PM
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Joined: Jan 2005
Posts: 1,222
okla.
okie
OP
pro stock
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OP
pro stock
Joined: Jan 2005
Posts: 1,222
okla.
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796071
09/10/10 08:44 AM
09/10/10 08:44 AM
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Joined: Jan 2003
Posts: 5,907
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,907
Athens, Greece
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Quote:
Think what???
I'd be more worried about the moisture in my lines. DOT5 attracts condensation. DOT 3, is just fine, be careful when you use it around your paint and engine bay and you'll be fine.
Here is an excerpt from a website about all the grades "There are disadvantages to glycol brake fluid however. For one thing, the very attribute that enables it to accept moisture actually causes it to attract moisture, as any alcohol product will. For this reason, brake fluid suppliers recommend that only small amounts be kept on hand, and that a tight seal be kept on any unused fluid. (In the old days, it used to be available only in metal cans.) Another disadvantage, and a significant one, is that glycol fluid is chemically caustic, meaning that it damages other materials. It effortlessly removes paint and does strange things to plastic. (Even after it is wiped off, glycol fluid causes catalytic embrittlement, a chemical reaction on the molecular level that leads quickly to deep cracks. The ABS plastic used in motorcycle bodywork is especially susceptible.) "
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Brake Fliud Gone Where?????
[Re: Pyper70]
#796072
09/10/10 09:17 AM
09/10/10 09:17 AM
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Joined: Apr 2007
Posts: 905
SD
zrxkawboy
super stock
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super stock
Joined: Apr 2007
Posts: 905
SD
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Quote:
Quote:
Think what???
I'd be more worried about the moisture in my lines. DOT5 attracts condensation. DOT 3, is just fine, be careful when you use it around your paint and engine bay and you'll be fine.
Here is an excerpt from a website about all the grades "There are disadvantages to glycol brake fluid however. For one thing, the very attribute that enables it to accept moisture actually causes it to attract moisture, as any alcohol product will. For this reason, brake fluid suppliers recommend that only small amounts be kept on hand, and that a tight seal be kept on any unused fluid. (In the old days, it used to be available only in metal cans.) Another disadvantage, and a significant one, is that glycol fluid is chemically caustic, meaning that it damages other materials. It effortlessly removes paint and does strange things to plastic. (Even after it is wiped off, glycol fluid causes catalytic embrittlement, a chemical reaction on the molecular level that leads quickly to deep cracks. The ABS plastic used in motorcycle bodywork is especially susceptible.) "
You've got it bass-ackwards. All the glycol stuff you quoted is about DOT 3/4. DOT 5 is silicone-based.
It's Swifty! Swifty, you toad sucker!
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Re: Brake Fliud Gone Where?????
[Re: zrxkawboy]
#796073
09/10/10 10:00 AM
09/10/10 10:00 AM
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Joined: Jan 2008
Posts: 417
jamestown, ny
71scamp440
Hinged
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Hinged
Joined: Jan 2008
Posts: 417
jamestown, ny
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Quote:
Quote:
Quote:
Think what???
I'd be more worried about the moisture in my lines. DOT5 attracts condensation. DOT 3, is just fine, be careful when you use it around your paint and engine bay and you'll be fine.
Here is an excerpt from a website about all the grades "There are disadvantages to glycol brake fluid however. For one thing, the very attribute that enables it to accept moisture actually causes it to attract moisture, as any alcohol product will. For this reason, brake fluid suppliers recommend that only small amounts be kept on hand, and that a tight seal be kept on any unused fluid. (In the old days, it used to be available only in metal cans.) Another disadvantage, and a significant one, is that glycol fluid is chemically caustic, meaning that it damages other materials. It effortlessly removes paint and does strange things to plastic. (Even after it is wiped off, glycol fluid causes catalytic embrittlement, a chemical reaction on the molecular level that leads quickly to deep cracks. The ABS plastic used in motorcycle bodywork is especially susceptible.) "
You've got it bass-ackwards. All the glycol stuff you quoted is about DOT 3/4. DOT 5 is silicone-based.
 with you on this one. dot 5 wont peel your paint or discolor it in anyway. its silicone. all it will do is make your paint have the wet look until you wipe it off. and yes i know this from my personal experiences. 
71 scamp
big block with 915 heads
727 trans
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Re: Brake Fliud Gone Where?????
[Re: zrxkawboy]
#796074
09/10/10 10:09 AM
09/10/10 10:09 AM
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Joined: Jan 2003
Posts: 5,907
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,907
Athens, Greece
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Quote:
Quote:
Quote:
Think what???
I'd be more worried about the moisture in my lines. DOT5 attracts condensation. DOT 3, is just fine, be careful when you use it around your paint and engine bay and you'll be fine.
Here is an excerpt from a website about all the grades "There are disadvantages to glycol brake fluid however. For one thing, the very attribute that enables it to accept moisture actually causes it to attract moisture, as any alcohol product will. For this reason, brake fluid suppliers recommend that only small amounts be kept on hand, and that a tight seal be kept on any unused fluid. (In the old days, it used to be available only in metal cans.) Another disadvantage, and a significant one, is that glycol fluid is chemically caustic, meaning that it damages other materials. It effortlessly removes paint and does strange things to plastic. (Even after it is wiped off, glycol fluid causes catalytic embrittlement, a chemical reaction on the molecular level that leads quickly to deep cracks. The ABS plastic used in motorcycle bodywork is especially susceptible.) "
You've got it bass-ackwards. All the glycol stuff you quoted is about DOT 3/4. DOT 5 is silicone-based.
Sorry...my bad...This what happens when you multi-task and start drinking middle of the day
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Brake Fliud Gone Where?????
[Re: Pntastar69]
#796076
09/10/10 02:02 PM
09/10/10 02:02 PM
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Joined: Jan 2003
Posts: 5,907
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,907
Athens, Greece
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Could be either or....depends on the aftermarket MC you buy. Factory is a spring clamp with a rubber diaphragm on the inside
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Brake Fliud Gone Where?????
[Re: okie]
#796078
09/10/10 05:56 PM
09/10/10 05:56 PM
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Joined: Jan 2003
Posts: 75,092
A Banana Republic near you.
JohnRR
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I Win
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Quote:
The 1 I got on it isn't the spring clamp. It has a bolt and double eared piece that is about 3" long. I cleaned it off good this morning and drove it awhile and there is fluid back on the bottom of the master cylinder, I did have brakes when I drove it. I have another master cylinder now so I'm going to change them out. I just hope this fixes it. Ronnie
Take the cover off carefully and see if there is fluid on the top surfaces , also those surfaces are usually not smooth, have alot of scratches and will leak , I usually lap mastercylinders , especially rebuilt units , before instal to get a smooth sealing surface .
Also check that the lines are tight , if they are leaking you will have fluid under the master .
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Re: Brake Fliud Gone Where?????
[Re: JohnRR]
#796080
09/10/10 06:42 PM
09/10/10 06:42 PM
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Joined: May 2004
Posts: 679
N.E Indiana
repad
super street
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super street
Joined: May 2004
Posts: 679
N.E Indiana
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Quote:
Quote:
The 1 I got on it isn't the spring clamp. It has a bolt and double eared piece that is about 3" long. I cleaned it off good this morning and drove it awhile and there is fluid back on the bottom of the master cylinder, I did have brakes when I drove it. I have another master cylinder now so I'm going to change them out. I just hope this fixes it. Ronnie
Take the cover off carefully and see if there is fluid on the top surfaces , also those surfaces are usually not smooth, have alot of scratches and will leak , I usually lap mastercylinders , especially rebuilt units , before instal to get a smooth sealing surface .
Also check that the lines are tight , if they are leaking you will have fluid under the master .
How do you lap a master cylinder lip?
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Re: Brake Fliud Gone Where?????
[Re: Nukechargerboy]
#796082
09/11/10 01:20 AM
09/11/10 01:20 AM
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Joined: Jan 2003
Posts: 75,092
A Banana Republic near you.
JohnRR
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I Win
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Quote:
With a lapping block and lapping compound. Never did it but I'm pretty sure it's like lapping a gate valve disc. 
I use a piece of fine emery cloth , full sheet size , double back taped to a surface plate at work , run it in a figure 8 pattern .
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