OEM 2001 Buick LeSabre Brake Master Cylinder

2001 Buick LeSabre Brake Master Cylinder Parts Questions & Experts Answers

• Q: How to overhaul the brake master cylinder on 2001 Buick LeSabre?

  A: Install the Brake Master Cylinder mounting flange into a bench vise and secure it while keeping easy access to the back of the primary Piston. Examine the exterior of the master cylinder reservoir near the cap for damage after you sanitize the area before removing the parts to inspect them. Replace any components with issues. Use a smooth tool to push down the primary Piston to remove the Piston retainer and take out the primary Piston assembly from within the cylinder bore. Intake both front and back cylinder ports while inserting the front port with low pressure non-lubricated filtered air to extract the secondary Piston, primary Piston, secondary seal, and the return spring. Get rid of the primary Piston unit including its retainer and seals at the secondary Piston. You must clean the master cylinder's interior part and exterior parts using denatured alcohol. Inspect the secondary Piston and return spring for damage through examination. Replace the master cylinder when you find surface problems. Explain dust contamination on all sections with filtered air then smear delco supreme 11 brake fluid onto the main tube, second Piston, and return spring as well as other components. Set the lubricated new primary and retainer seal along with the new secondary seal onto the secondary Piston. Introduce the lubricated return spring and secondary Piston assembly in the cylinder bore before adding the lubricated new primary Piston assembly . Press down on the primary Piston with a smooth tool and put on the new Piston retainer. Replace the master cylinder reservoir components and fit them with their cap and diaphragm before installing the master cylinder again into the vehicle.