Car Brakes in Macclesfield - Shaw Street Garage
Here at Shaw Street Garage we advise a BRAKE FLUID CHANGE every TWO years. Brake fluid deteriorates over time. It attracts and absorbs water from the air, which is an unavoidable continuous process even in a closed system like your brakes.
Brake fluid needs to have a high boiling point, usually around 260 deg C, because of the considerable heat produced by the friction between the brake lining materials and the discs and drums. However, when brake fluid absorbs water, its boiling point is reduced. The water absorbed can reduce this boiling point from 260 degC to 140degC. Eventually, the heat produced by using your brakes will vaporise the fluid, and vapour unlike liquid is compressible. So when you use your brakes you are compressing the vapour which can make your brakes feel spongy or at worst lead to partial or complete failure.
THERE IS ALSO A LEGAL ASPECT. If you were involved in an accident and your brake fluid was found to be faulty by the Police, you could be fined and your insurance cover put in question, even if the accident was not your fault.