Does Brake Fluid Evaporate???????
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,203
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From: Las Vegas Nevada
Does Brake Fluid Evaporate???????
Cause I noticed the brakes were a bit on the long side this morning. Checked the fluid and the rear reseviour was EMPTY. Now I just checked this maybe a week ago. it was full. I checked the front calipers....no oil. Pulled the rear wheels....no oil. Where the heck did it go. I did notice what looked like an oilyrun coming from the back of the MC but it was pretty dry. Any ideas. Could it have leaked into the booster? :eek:
Le Mans Master
Joined: Jun 2002
Posts: 6,097
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From: High Plains Drifter Fayetteville, AR
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
Could it have leaked into the booster? :eek:
I don't think brake fluid will evaporate, at least not that quickly. Also, look in the drivers side storage compartment and check if fluid is leaking out of the ABS module.
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,203
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From: Las Vegas Nevada
Re: Does Brake Fluid Evaporate??????? (JCAIRE2)
No ABS or Airbags on this baby....still flying by the seat of my pants.
I ordered a new MC anyway. What the heck. Its got so much of my money now...whats another hundred or so. :lol:
[Modified by Southern Comfort, 4:43 PM 8/20/2003]
I ordered a new MC anyway. What the heck. Its got so much of my money now...whats another hundred or so. :lol:
[Modified by Southern Comfort, 4:43 PM 8/20/2003]
Le Mans Master
Joined: Jun 2002
Posts: 6,097
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From: High Plains Drifter Fayetteville, AR
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
I always forget to check for year of the car when I reply :banghead:
Have you pulled the MC to check the seal, it takes like 3 minutes to loosen the nuts and swing it out. Might save you a $100, but cause more frustration if that's not the problem.
Have you pulled the MC to check the seal, it takes like 3 minutes to loosen the nuts and swing it out. Might save you a $100, but cause more frustration if that's not the problem.
Drifting
Joined: Aug 2002
Posts: 1,857
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From: Yakima WA
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
I have replaced my master brake cylinder (was leaking) but I too have noticed a bit of a drop in the fluid level. Is it bad to add fluid to resevoir if it drops? Or leave it alone if it isn't too low.
Advanced
Joined: May 2002
Posts: 56
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From: Yorktown Heights NY
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
Well, lets check the basics first. Pull the wheels and check the calipers thoroughly. Make sure you check the bleeder valves to make sure that they are tight. Check the flex hose from the caliper to the hard line. see if it may be leaking from there.
If all is well, check the condition of the pads. Calipers have resevoir behind the pistons that hold brake fluid. If the pads are worn, that means the piston is further out of its bore, thus increasing the size of the resevoir.
Your problem sounds like that might be the case.
Good luck....
George Patchoros
1988 Coupe
If all is well, check the condition of the pads. Calipers have resevoir behind the pistons that hold brake fluid. If the pads are worn, that means the piston is further out of its bore, thus increasing the size of the resevoir.
Your problem sounds like that might be the case.
Good luck....
George Patchoros
1988 Coupe
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Thread Starter
Le Mans Master
Joined: May 2003
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From: Las Vegas Nevada
Re: Does Brake Fluid Evaporate??????? (GeorgeL98)
The fronts are new and the rears are about 50%. No oil externally anywhere except that little drip line behind the MC where it bolts to the PB
Thread Starter
Le Mans Master
Joined: May 2003
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From: Las Vegas Nevada
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
Ok...I just pulled the MC and there was some oil behind it in the well. I remember I adjusted the PB rod about a month ago. could it be that I adjusted out too much? would this cause the MC to leak if there was constant pressure from the rod?
Le Mans Master
Joined: Jun 2002
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From: High Plains Drifter Fayetteville, AR
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
Ok...I just pulled the MC and there was some oil behind it in the well. I remember I adjusted the PB rod about a month ago. could it be that I adjusted out too much? would this cause the MC to leak if there was constant pressure from the rod?
Le Mans Master
Joined: Jun 2002
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From: High Plains Drifter Fayetteville, AR
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
If you don't change it, the brake fluid will eat the front seal on the booster and you'll be replacing that in time also. If only a little fluid has gotten on the booster seal you should be ok. Just make sure you clean the front seal on the booster with some brake cleaner ASAP.
Le Mans Master
Joined: Jun 2002
Posts: 6,097
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From: High Plains Drifter Fayetteville, AR
Re: Does Brake Fluid Evaporate??????? (Southern Comfort)
:flag Thanks.....am changing it tomorrow....Also will be flushing the system and adding the synthetic fluid.
