What to Do When the Brake Piston Doesn't Retract?
3 Answers
If the brake caliper piston is stuck, it will cause braking resistance, and the brake caliper will remain fixed. When braking, the caliper clamps the brake disc to complete the braking action. This can lead to wear, drying, or damage to the rear wheel bearings. A car has four wheels, each connected to the body via bearings.
Having driven for over twenty years, I understand that brake issues must be handled with caution. If the brake piston doesn't retract, it might be stuck in the caliper, usually due to dust, dirt, or corrosion. In such cases, I first try to drive safely to a flat surface to check if the wheel is loose, then lift the vehicle and clean the caliper area with tools. If the problem persists, perhaps the piston seal has aged and needs replacement, but this should be done by a professional technician. During regular maintenance, I always remind myself to check the brake system and brake fluid condition to prevent such failures. Safety first—never neglect or delay, as emergency braking might fail and cause an accident.
As an amateur car enthusiast who loves tinkering with vehicles, I personally handle stuck brake piston issues. The main causes are usually piston rust or debris blockage. The first step is to jack up the car, remove the wheel, and inspect the caliper. If there's rust, spray it with brake cleaner to remove dirt. Lubricant can temporarily relieve sticking, but if the seal is damaged, it needs replacement. For prevention, I use compressed air to clean caliper gaps every time I change tires to avoid moisture buildup. Regularly check if the brake fluid is cloudy and replace it with a high-quality brand fluid when necessary. Remember to wear gloves for safety during operation. If self-inspection doesn't work, don't hesitate to seek professional repair.
