norma

brake fluid overheating?

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The brakes on my 73 2002 went out completely yesterday. Later when they cooled, they were fine. The brake fluid was boiling over and spilling out the reservoir. I recently had the calipers replaced. What would cause the overheating? Hoses? A bad MC? Bad calipers? The brakes weren't over-pumped. It was a short drive. I'm stumped so far. Thanks all.

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Guest Anonymous

A bad caliper can stick open and heat up the rotor enough to boil the fluid. Old contaminated brake fluid can boil faster than new fluid. Old hoses can collapse causing the caliper to stick open and heat up the rotor.

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HEAT IN THE BRAKE FLUID IS CAUSED BY FRICTION -

A L O T OF FRICTION !!

EITHER YOUR BRAKES are stuck on - calipers

sticking and dragging excessively,

or someone screwed with the pedals, master

cylinder linkage and the master cylinder

is always appying pressure to the brakes

drive it again for 1 mile and walk around the car feeling

each rim at it's center to see which ones are overheating......

look at the front brake disks - are they black/blue ?

or grayish ? are you smelling anything unusual ?

to boil brake fluid to the point that

you had fluid come out of the fluid res.

is VERY UNUSUAL!!! and an indication

of something VERY WRONG WITH THE CAR!

you should not drive it untill the cause is found and repaired.

YOU ARE LIKELY TO LOOSE ALL BRAKING DUE TO SEAL

DAMAGE AND TOTAL FAILURE FROM SUCH HEAT

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For once, I agree with CD's use of color and caps-

this is not a good thing.

t

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Thanks, guys. This obviously is a big problem. The mechanic locally who put in the calipers recently is suspect. But I'm not driving the car till it's figured out. I'll probably take it somewhere else. More to come.

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For once, I agree with CD's use of color and caps-

this is not a good thing.

t

Funny, I had the exact same train of thought while reading the same stuff...

In particular, this part summed up the issue well:

is VERY UNUSUAL!!! and an indication

of something VERY WRONG WITH THE CAR!

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If the brakes are getting hot on all 4 corners, then it's very likely that there is not enough play between the pedal and the master cylinder.

In other words, the master cylinder pushrod is not allowed to come all the way out.

W. B.

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Make sure to drain and change the brake fluid, after you figure out what the problem is. I have never heard of that before. Also inspect the pads and rotors for damage.

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