noisy brakes

[paddy1470]

hi all got my van just on road full mot but now have prob with brakes .had new disks pads and wheel bearing and passed mot 100% but after i drive van 4 an hour i get a constant horrible squeal but if i put foot on brake gentley noise disappears ,take foot off brake noise back. it must only occur when they hot any ideas thanks

[Hacksawbob]

Is the disk hot? (spit and sizzle test) or jack the van up and spin the wheel see if the calliper may sticking.

[paddy1470]

i have jacked up the wheel and spun it but i suppose that was when brakes were cold and did spin with out problem

[kevtherev]

hi all got my van just on road full mot but now have prob with brakes .had new disks pads and wheel bearing and passed mot 100% but after i drive van 4 an hour i get a constant horrible squeal but if i put foot on brake gentley noise disappears ,take foot off brake noise back. it must only occur when they hot any ideas thanks

get you pads back out and put some copperslip grease an the back of them
Also put some on the caliper lugs that hold them, basically wherever the pads touch the caliper.

the squeal is a harmonic resonance..like drawing a bowstring across a violin string

[paddy1470]

thanks i will do that the weekend if the rain stops lol