Hello members;
I am new to posting in this forum and am looking for some advice.
I recently replaced all 4 rotors and pads on my is300 with aftermarket cross drilled rotors with zinc plating and ceramic pads.
After the job was finished I took the vehicle for a short drive and noticed that there was a rubbing noise coming from the vehicle just coasting and not applying the brakes. The noise became more intense when the brakes were applied. I would describe the sound as a metalic type like the rotor was rubbing. I could not tell where exactly it was coming from.
If anyone has not driven their car for a few weeks and light corrosion builds up on the rotor when driven it makes a rubbing/grinding noise until the rust build up wears off. The noise occurs even when not braking.
On closer inspection I jacked the car up and tested all 4 wheels. They all make this sound. It sounds like the pads are dragging on the rotors. There is slight resitance when I turn the tire but I can still turn it fine. The rotors are zinc plated so I am wondering if the extra coating of zinc could be causing this decrased clearance between the rotor and pad, or could it be the drilled holes?
I lubbed the pins and shims etc.. and retracted all the pistons back prior to installing the new pads.
Could this be normal wear-in process? The car breaks fine. sticky or non-retracting piston perhaps, but would this happen on all 4 wheels?
Any suggestions would be appreciated.
Thank-you
