The brake caliper piston is a key component in the automotive braking system. It is located inside the brake caliper and its main function is to push the brake pads into contact and separate from the brake disc through the reciprocating motion of the piston, thereby achieving deceleration or parking of the car.

When you step on the brake pedal, the brake fluid enters the brake caliper through the pipeline, pushing the piston to move and causing the brake pads to tightly press against the brake disc, generating friction and slowing down or stopping the vehicle. If there is a problem with the brake caliper piston, such as rust, jamming, or damaged sealing rings, it can cause brake failure or poor braking effect, seriously affecting driving safety.

Here are some repair suggestions for common problems with brake caliper pistons:

Rust treatment: If the brake oil is not replaced for a long time or the vehicle is exposed to a humid environment for a long time, the brake caliper piston is prone to rust. At this point, it is necessary to remove the piston, sand it with sandpaper to remove rust, clean it with rust remover, and apply an appropriate amount of lubricating grease.

Sealing ring replacement: Aging or damage to the sealing ring can cause poor piston sealing, affecting the braking effect. It is necessary to replace the sealing ring with a new one and ensure that the specifications are the same as the original sealing ring.

Piston jamming treatment: Piston jamming may be caused by a small gap between the piston and the cylinder wall or impurities entering. You can gently polish the surface of the piston, remove impurities, and apply an appropriate amount of lubricating grease.

To ensure driving safety, it is recommended to regularly check the working condition of the brake caliper piston and promptly address potential issues.