Dorman M64986 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, Oldsmobile, and Pontiac

The Dorman M64986 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Chevrolet, Oldsmobile, and Pontiac vehicles. Designed with durable cast iron and a 1-inch bore diameter, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.

• Master cylinder bore diameter: 1 inch for precise hydraulic control
• Constructed from cast iron for long-lasting durability
• Includes reservoir for brake fluid storage
• Two outlets with rearward outlet size 1/2-20 and secondary outlet thread diameter 9/16-18
• Compatible with Chevrolet Camaro, El Camino, Malibu, Monte Carlo, Nova, Oldsmobile Omega, and Pontiac Firebird
• Part number M64986 for accurate replacement

Durable Construction and Precise Fitment

This Dorman brake master cylinder features a cast iron body that withstands the rigors of brake system pressure and heat. The included reservoir allows for proper brake fluid containment, while the two outlet ports with specific thread sizes (1/2-20 rearward and 9/16-18 secondary) provide secure connections to the brake lines. The 1-inch bore diameter is designed to match original equipment specifications, ensuring consistent brake pedal feel and hydraulic response.

Compatible Vehicles and Applications

The M64986 master cylinder is compatible with a range of classic and late-model vehicles, including Chevrolet Camaro, El Camino, Malibu, Monte Carlo, Nova, Oldsmobile Omega, and Pontiac Firebird. This part is ideal for restoring brake hydraulics in these models, maintaining factory performance and safety standards.

• Restores proper brake fluid pressure and pedal feel
• Replaces worn or leaking master cylinders
• Eliminates brake fluid leaks and contamination
• Addresses spongy or unresponsive brake pedal issues
• Supports brake system rebuilds and maintenance

Installation Notes and Tips

Installation of the Dorman M64986 master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. Note that mounting hardware is not included, so original or compatible fasteners will be needed. Verify thread sizes on brake lines to match the 1/2-20 and 9/16-18 outlet ports for a secure fit. It is recommended to inspect related brake components during installation for comprehensive system reliability.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. While specific warranty details for part number M64986 should be confirmed at the time of purchase, Dorman typically offers limited warranties covering defects in material and workmanship to support customer confidence.