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Toyota Repair/sticking brake caliper piston Toyota Corolla


Is it possible to free up a sticking brake caliper piston rod
with a small amount of penetrating oil applied judiciously?

If not, is there another way to free it up so that it does not contribute to
drag and wear?

Calipers usually stick due to rust which means there is some moisture either from external sources of within the brake fluid, to answer your question yes the pistons can be freed up using penetrating oil, petroleum based oils can deform the rubber piston seals so at that time I would recommend replacing the o-ring seals in the caliper, since I'm not sure what year and model this is I will also make a general recommendation to clean and lubricate all moving parts such as sliding pins and brake pad contact areas, I hope this answers your question if not please let me know.

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Ted Ritter


I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for more ten years an have answered over 16,000 questions helping Toyota owners with their problems and save thousands of dollars without any compensation, some of my answers are published on many other websites including google and various automotive forums. DONATIONS ARE VERY MUCH APPRECIATED, IF YOU HAVE RECIEVED HELPFUL INFORMATION PLEASE MAKE A DONATION. AS OF TODAY (JULY 22, 2014) ALL REQUESTED GRAPHICS, ILLUSTRATIONS, DIAGRAMS, PHOTOS, WILL REQUIRE THE MINUMUM DONATION UP FRONT.


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