Warped discs

[allegro]

I have measured the run off and am getting 0.05 mm drivers side and 0.07mm passenger side. The drivers side however is stiff through the about 60 degrees of its rotation. Is it possible that the calipers are not fully disengaging when brake pressure is removed question.gif This would explain why the problem is not consistant and the degree of brake wabble varies question.gif

 

Andy Mac

teeth.gifOut of Control RED SLR teeth.gif

[R2D2]

The disc should rotate evenly. It sounds like you may have a lazy caliper but I would be surprised that this would produce a pedal kick back. The lazy piston could have caused some glazing.

 

Try taking the pads out first.

[allegro]

If I had a lazy caliper, whats the remedy question.gif

 

Andy Mac

teeth.gifOut of Control RED SLR teeth.gif

[R2D2]

Pull the pistons out clean, check for wear, clean the piston and cylinder, they can build up crud on the leading edge and replace the seals if needed.

[ashaughnessy]

I once had a binding brake on my mini that was caused by a twist in the flexible brake line blocking the fluid return when you lift your foot off the pedal. It wasn't obviously kinked (like your garden hosepipe gets) but still managed to block the return flow enough to cause the brake to stick on. If you suspect binding brakes, check the flexible line is not twisted or kinked.