What kind of lubricating oil is used for the brake caliper guide pins?
2 Answers
Ecco-Grease-EM71-2 special grease for plastic and rubber. Below are the relevant details: 1. Introduction to brake caliper and guide pin lubricant: Ecco-Grease-EM71-2 special grease for plastic and rubber is a lubricating grease made from polyether synthetic oil as the base oil, special lithium soap as the thickener, and refined with various additives such as antioxidants, anti-corrosion agents, and anti-aging agents. This plastic and rubber compatible grease is designed for the assembly lubrication of rubber, plastic, and metal components that are sensitive to most greases, such as ethylene propylene diene monomer rubber, styrene-butadiene rubber, and natural rubber. It features excellent adhesion, wear resistance, and corrosion resistance. 2. Brake caliper: An essential component of the chassis braking system, its main function is to push the brake pads, which then rub against the brake drum to reduce speed and bring the vehicle to a stop. When the brake pedal is pressed, the master cylinder generates thrust to push hydraulic oil to the caliper, and the piston inside the caliper moves under hydraulic pressure to push the brake pads.
I've thought about the guide pin lubrication issue several times. You must use specialized brake guide pin grease, usually silicone-based or copper-based, which has excellent high-temperature resistance. If you use regular engine oil or butter, it can easily melt and dissipate under high temperatures, greatly reducing the lubrication effect and potentially corroding rubber components, leading to brake seizure, which is very dangerous. When I repair my car, I prefer to use reputable brands like 3M or Bosch for this type of grease. Before applying, clean the pins thoroughly to remove any dirt, and apply a thin, even layer—too much can attract dust and increase wear. It's recommended to check the lubrication condition every time you change brake pads or during annual maintenance, as this can extend the life of the brake system and ensure driving safety. Never skimp and use the wrong product—regretting it after an accident would be too late.
