OEM 2003 Toyota Avalon Brake Master Cylinder

2003 Toyota Avalon Parts Questions & Experts Answers

• Q: How to service and repair the Brake Master Cylinder on 2003 Toyota Avalon?

  A: The service and repair of Brake Master Cylinder begins with reservoir removal by disassembling the set screw while maintaining a torque measurement of 1.7 Nm (17.5 kgf-cm, 15.2 inch lbs.). After removing the strainer-cap from the reservoir take out the first grommet followed by the second grommet. Customers without VSC should insert the cylinder into a vise before using a screwdriver to remove the piston stopper bolt while pushing the pistons to full extension under a torque of 10 Nm (100 kgf-cm, 7 ft. lbs.). Using a screwdriver push the first piston in before removing its snap ring using snap ring pliers so you can extract the No. 1 piston as well as its spring without damaging the cylinder bore. On the work table place a rag together with two wooden blocks and ensure the rag stands 100 mm (3.94 inch) above the blocks before lightly striking the cylinder flange against the block edges to let the piston emerge. To remove the straight pin from a cylinder body with VSC function users should use a screwdriver to push the piston along with turning the body then extract both pistons and springs manually from the body. The process of putting together the engine needs special attention to the rubber lips while placing the No.2 piston flat with its groove oriented horizontally. The cylinder bore should be assessed for both rust and scoring and the area should be checked for signs of wear or damage before cleaning and replacing the cylinder. You should undertake reassembly beginning from the reverse order of disassembly while using lithium soap base glycol grease on parts marked with arrows.