01-04-2014, 12:53 PM
Al materials have a resonating frequency of the atoms. When the frequency of the pads match that of the pistons and they are pushed together a noise is emitted (sqeal). Therefore putting something between the back of the pad and the piston stops them reacting with each other. Copper grease or better still shims (a thin piece of metal) are used. Shims are better because the grease wears off. Best thing is to change the pads for ones with shims attached.
That's the bull***t I've been told, but it does figure!
That's the bull***t I've been told, but it does figure!