How to Fix Frequent Front Wheel Brake Locking on Buick Excelle?
2 Answers
It is caused by the sticking and failure to return of the brake master cylinder cup. This usually occurs due to water or other impurities in the brake system, or failure to clean the system before replacing with a different brand of brake fluid. Issues with the fit between the master cylinder cup and the master cylinder inner diameter. During the development phase, such problems often arise from excessive interference fit between the master cylinder cup and the inner diameter, leading to failure to return. It can also be caused by the brake piston failing to return or poor return performance, inferior material properties of the square seal ring, or mismatched dimensions between the square seal ring, caliper inner diameter, and caliper piston. Insufficient stiffness of the brake disc. After frequent braking, due to the insufficient stiffness of the brake disc, deformation may occur, leading to wheel locking during subsequent use.
As someone who frequently repairs cars, I'd say the front wheel brake seizure issue in the Buick Excelle is commonly caused by caliper failure or brake pad adhesion. Possible reasons include: caliper piston return failure leading to jamming (often due to dried-up lubrication or rust); uneven brake pad wear creating irregular pressure; or deteriorated/insufficient brake fluid affecting system rebound. For DIY inspection, lift the wheel to check for abnormal friction marks or rust spots. If stuck, use tools to lubricate and test return function. It's recommended to visit a repair shop for hydraulic component diagnosis with a pressure tester - replace damaged calipers or perform system cleaning. Regular maintenance (e.g. lubricating every six months) can prevent issues. Safety first - neglecting this may cause high-speed loss of control or accidents. Prompt repair ensures smooth driving. Note: The Buick's front suspension design sometimes requires professional adjustment - don't attempt disassembly to save small costs.
