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Should Lubricating Oil Be Applied to the Brake Caliper Piston of a Car?

2 Answers

McLouis

09/05/25 6:33am

An appropriate amount of lubricating oil should be applied to the brake caliper piston of a car. Below is a detailed introduction about car brakes: 1. Brake: Braking, also known as stopping, refers to the action of stopping or reducing the speed of a running locomotive, vehicle, other means of transportation, or machinery. The brake device is a mechanical braking device that can slow down the speed, also known as a decelerator. 2. Brake system: The brake system consists of a control system, a hydraulic system, and a power assist system. The control system includes the pedal, handbrake, etc. The hydraulic system is composed of hydraulic oil, a brake pump, and hydraulic oil pipes. The power assist system is the vacuum booster pump. The electronic control system consists of an ABS pump, ABS sensors, and an ABS computer. The execution system is made up of brake calipers, brake pads, and brake discs.

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DeHeidi

09/17/25 6:53am

In my car repair experience, I've found that many people think applying lubricant to the brake caliper piston can help it retract smoothly, but this is actually a deadly mistake. I've seen cases where after owners did this, the brakes failed completely because the oil seeped onto the discs and pads during braking, significantly reducing friction effectiveness, causing the car to skid several meters. The correct approach is to use dedicated brake cleaner to wipe the piston surface clean, avoiding any oil contamination. If the piston gets stuck, it might be due to aged seals needing replacement, or lubricating guide pins - components that don't directly contact the braking surface. Regularly checking if the brake fluid level is sufficient is also crucial, as low fluid affects piston pushing force. Remember, the braking system is life-critical - don't randomly add substances. Just get regular maintenance at professional shops to inspect guide pins and rubber boots.

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