Question: What is a common cause for pedal pulsation that presents itself shortly after a brake job has been performed?
Answer: Today’s vehicles are staying on the road much longer. The square cut seal in the caliper can become stiff and prevent the piston’s return. While no leaks are visible, this condition keeps the piston from retracting and causes the friction material to drag. The buildup of friction material on the rotor face then creates pulsations that would not have otherwise occurred.