Does any body know what cause the burn/hot spots. Mine had a couple burn/hot spot on it so I took it off and go buy two brand new ones to put on. Then took it to the freeway and back then check them out and they too have the burn/hot spots on them too. It shakes really bad when braking with those burn/hot spots on the rotor. Help, advise on what may cause those burn/hot spots.
Location: I renounced punctuation
Registered: May 2002
Re: Burn/Hot Spot on 2 Front Rotor (mk3)
Fri, 15 August 2003 21:42
I just wonder if they are resin deposits? Resin will cause really nasty vibrations under braking as it has a rather different coefficient of friction to the steel rotor.
Some pads are worse than others (EBC green and slotted rotors are notorious for leaving resin), but it can also happen if you haven't bedded the pads in properly when they were first fitted. Machine the rotors, fit a different brand of pads, bed them in properly and try again.
If the rotors are truly getting hot such that you are 'burning' metal, I'd expect some blueing around the burn spots (which I can't see). Also it suggests the rotors are getting up to high temperature quickly. This should cause the rotors to warp. It might pay to check the rotors for runout with a dial indicator. If your brand new rotors are warped, then I'd check out the braking system.
Fri, 15 August 2003 15:00
