typical mistake: after machining brake drums and rotors, it has to be washed in warm soapy water, rinsed and dried. it was not a big concern back then when friction materials were made of asbestos. but with today's semi metallic, metallic and ceramic friction materials, they are more sensitive to cross glazing as the rotors/drums themselves. the cast iron dust not removed transfers to the brake linings and lo and behold, you have cast iron glazed brake lining against cast iron drum/rotor.






Reply With Quote