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Brakes
FAQ's
ANSWER:
Not always. Some brake noise is considered normal because of the harder
semi-metallic brake pads that are used on today's vehicles. This type of
noise does not affect the braking performance but if the noise is
objectionable there are ways to reduce or eliminate it.
Brake squeal is caused by vibration in the brake pads, rotors and
calipers. The noise can be reduced or eliminated by using noise
suppression shims (Which are already on most quality brake pads.), or by
using a noise suppression compound on the back of the brake pads to dampen
vibration. Additional steps to reduce or eliminate noise would be to
resurface or replace the brake rotors and/or replace the brake pads.
Some brands of semi-metallic brake pads are noisier than others. Cheaper
brake pads are sometimes quieter than premium brake pads because they are
made with softer materials, but they do not wear as well and could
lengthen your vehicles stopping distance. Premium brake pads should not
cause noise problems as long as they are properly installed and will give
you better performance and longer life.
If you hear a metallic grinding noise it usually means the brake pads are
worn to the steel backings and you should not drive the vehicle. The
braking effectiveness is greatly reduced at this point especially if the
car pulls to one side while braking.
Many brake pads now have built-in wear sensors that squeal to let you know
it's time to replace the brake pads, this allows you to change the pads
before they are worn down to the metal.
In any event, if you hear excessive brake noise it's time to get the
brakes inspected. Delaying service to your vehicle could add extra expense
to the repair work and could be dangerous to you and others.
