Red warning light beeping three times.

[james walker]

okay, well obviously this guys has....

youd know if there was a leak as air would enter the system, thus giving spongy brakes, and you would also see the fluid from the leak.

 

[wayne lcr]

well it dunt evaporate from mine or out the bottle so if it evaporating out of his surley these a problem sum were?

 

[james walker]

i top mine up and i have no leaks at all....

no point creating a problem when its already been solved tbh

 

[wayne lcr]

spot on

 

[Shaunyboy]

Brake fluid does not evaporate, its a sealed system. Brake fluid gets low either becuase there is a leak (broken pipe, leaky seal, split/crack hose or pipe, or simply down to friction material wear, as the disc and pads wear, the fluid has to compensate for this wear to keep the pistons in contact with the pad, it is also hydroscopic which means over time it absorbs mositure and the boiling point is lowerd, hence why you would get brake fade or spongy pedal at high temperatures.

 

[james walker]

hydroscopic is the word i was looking for... evaporate, nearly the same... what i ment tbh.

 

[Shaunyboy]

hydroscopic is the word i was looking for... evaporate, nearly the same... what i ment tbh.

Its a werid sustance, doesnt turn to water, but absorbs it

 

[Muttley]

Hygroscopic, not hydroscopic - has an affinity for water. You know. like salt . . .

Trouble is, brake fluid is carefully designed to stay stable at the high temperatures that occur in brake calipers under heavy braking. Water will boil, turn to steam (a compressible gas) and make your brakes go all weak and spongy. Which is why you should change your brake fluid every two years, if not sooner.

Hygroscopic behaviour is nothing like evaporation. Hygroscopic fluids will increase in volume as time goes on, from the water they have absorbed. Evaporation will reduce the volume of fluid.

 

[james walker]

check the geek out... well as i said i ment that, so i think the op has his answer anyways. the point was just because the light has come on doenst mean its leaking, just needs topping up.

 

[basemanuk]

well after trying to read all that science talk i think it is safe to say that the fluid was a touch under the level hence the beeping!
the answer to a few questions is that the brakes are not spongey and have not changed at all.
the reason i diddent check the fluid first is because i wanted some advice from people in here to what the problem maybe hence why i started the thread.

 

[james walker]

so, fluid was low, you have no leaks and you topped up and the lights gone off..... sorted then.

 

[Shaunyboy]

so, fluid was low, you have no leaks and you topped up and the lights gone off..... sorted then.

32 posts later

 

[james walker]

ha ha, sure i mentioned that in post 3 or summats.

 

[Shaunyboy]

Thats why i like this forum aha go all round the houses to come to the same conclusion

 

[james walker]

its a man thing that mate....