Can you Lose Brake Fluid without there being a leak?



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Thread: Can you Lose Brake Fluid without there being a leak?

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    Can you Lose Brake Fluid without there being a leak?

    So I took our company Chevy for a spin, and i had to really ut the peddle down to stop. Despite company policy I took a look at the brake reservoir nearly empty, the first half was bone dry, and the second half had a little bit left. Service on the fleet is a bit lacking, in the two years since its last tune up and oil change, can the fluid just disappear without a leak, or is their a deffinte leak I should report to fleet maintance?
    1995 Dodge Caravan FWD 3.3L
    Paul 1991-2010 I thank you everyday I have for the hobby you got me into

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    Simple simple. It is pad wear if there are no leaks. As the pad wears, the piston goes out more and it requires more fluid to fill the caliper. That is why you don't fill the res. before you do a brake job, because as you compress the pistons to accomodate the fat pads, you force fluid back up into the res. If it is full, you should drain it out before you do the brake job, then fill back after the job is done.
    2005 T&C Ltd 3.8 108,000
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    1990 Grand Caravan 3.3 149,000 owned 15yrs 4 trannies
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    There could be another case, when the master cylinder leaking into the vacum booster.
    who left the dodge out?
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    Well I know I shouldn't, (but if i submit it for repair I won't see it again all summer) but If i just bleed the brakes since half of the system went dry, and refilled I should be fine?
    1995 Dodge Caravan FWD 3.3L
    Paul 1991-2010 I thank you everyday I have for the hobby you got me into

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    If you have air in the system, it should be bled out. If you have ABS brakes, bleeding may not be so simple and may require a scan tool to cycle the solenoids in the ABS modulator, to facilitate bleeding. That was mentioned in another Post today.

    Could have the brake fluid topped up so you can monitor what's happening. Brake wear will contribute to a lowering of brake fluid in the master cylinder reservoir but I suspect something else is going on as well. How many miles on the brakes?

    Brakes are nothing to fool with and since you have already said you had trouble stopping, I suspect work is needed on them. Be safe rather than sorry.
    Last edited by Jeepman; 04-10-2010 at 09:16 AM.
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    Just report it to the company and get another vehicle in exchange for it.

    Regardless of whether it's your favorite vehicle, the company has their policies in place for a reason, and if something happens that can be linked to the brakes, and it can be proven that you serviced them against company policy, they can probably fire you and force you to pay for the damages caused by the incident, as well as any repairs to the vehicle deemed necessary to negate the "work" you did.

    It's not worth it to keep your "favorite" vehicle.

    However, the company would have no grounds for dismissal if you'd simply checked fluids, as this is actually a part of operation of a fleet-based motor vehicle. A basic check of all systems involved in the safe, reliable operation of the vehicle in question should be performed before ANY duty related operation occurs. I believe the NHTSA has a report on it, but I don't have the gumption to search for it. Regardless, if they were to chastise, dismiss, or otherwise punish you for doing so, you'd have grounds to file suit against them.

    On their end, though, and especially since you're (probably) not a certified mechanic, and surely not employed in capacity as a maintenance technician with the company in question, you should just notify them of what has been done thus far, and let them take over from there.
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    Quote Originally Posted by F BULLDOG View Post
    There could be another case, when the master cylinder leaking into the vacum booster.
    or it could of been like my dad's van, where the master cylinder was leaking, but it wouldn't leave a puddle behind either. it wasn't leaking into the vacuum booster, I know this because the inside of that was bone dry, but everything below the master cylinder was wet, and it had leaked all over the p/s rack, which at first made me think that the rack was leaky.
    Im 25 and my parents own a 2014 Grand Caravan R/T (3.6l, 1000 miles) 2007 Dodge Caliber SXT (1.8l 78k miles 5spd), a 2001 Chrysler PT Cruiser ((which is mine) 2.4l 116k miles 41TE), and a 2000 Ford Mustang base (3.8l, 4 spd auto 27k miles)

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    I used to have a boot store and repair boots. Once I sold a pair to a fellow I knew and a week later he was in the store and hot. He pointed out on the foot of the boot, dots of dye had come off, revealing the yellow leather under the dark brown two-toning finish. He was sure the boot was defective, I assured him it was not, but that I would redye the boot to make him happy. I encouraged him to inspect his master cylinder in his old truck, since it looked to me like a spray of brake fluid had come out on top of his boot. He assured me that his MC was not leaking, but he would check. A couple of days later he came back in super apologetic, his master cylinder was sending out an atomized mist of fluid when he stomped it. I fixed it free and had a friend for life. But just pointing out another way you can leak fluid without finding an obvious leak. It would show up eventually somewhere, but you might run through two or three cobblers before you found it. Brake fluid is a great way to strip a boot.
    2005 T&C Ltd 3.8 108,000
    2000 Caravan 2.4l
    1990 Grand Caravan 3.3 149,000 owned 15yrs 4 trannies
    1990 Dynasty 3.0 120k 1 tranny 4yrs
    1981 Dodge Aries 2.6 only new car I ever bought 225k orig 11yrs
    1966 Dodge Coronet 440 Wagon, way old 1 yr. 135$ (Had to borrow it at the bank!)
    1964 Simca 1000 (bought for $10 rebored) 50k 4yrs
    1965 Ply Valiant V8 85k
    1964 Ply Valiant Wagon slant 6 200k 1 qt/200 miles
    1969 Corvair convertible 4 carb

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