Dorman M39514 Brake Master Cylinder

Reliable Brake Master Cylinder for Toyota Celica and Supra

The Dorman M39514 brake master cylinder is engineered to restore proper brake hydraulics for Toyota Celica and Supra models. Designed with durable cast iron and a built-in reservoir, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Master cylinder bore diameter: 0.938 inches for precise hydraulic control
• Constructed from cast iron for strength and durability
• Includes reservoir for brake fluid storage
• Two outlet ports with rearward outlet size M10 x 1.0 and 10mm secondary outlet thread diameter
• Thread pitch of 1.0 for secure fitting
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M39514 brake master cylinder is specifically designed for Toyota Celica and Supra vehicles, providing a direct replacement for the original part. Its 0.938-inch bore diameter allows for accurate brake fluid displacement, essential for maintaining proper brake pedal feel and stopping performance. The cast iron construction offers resistance to wear and corrosion, extending the service life of the component. This master cylinder includes an integrated reservoir, eliminating the need for a separate fluid container and simplifying installation. Featuring two outlets, it supports dual-circuit brake systems, with a rearward outlet thread size of M10 x 1.0 and a secondary outlet thread diameter of 10mm, ensuring compatibility with factory brake lines.

Common Applications and Problem Resolution

• Restores brake fluid pressure in Toyota Celica and Supra brake systems
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses spongy or unresponsive brake pedal issues
• Fixes brake failure due to internal seal wear or bore damage
• Supports dual-circuit braking systems requiring two outlet ports

Installation Notes and Tips

When installing the Dorman M39514 brake master cylinder, ensure the brake fluid reservoir is properly filled and free of contaminants. Bleed the brake system thoroughly to remove air pockets and restore optimal hydraulic pressure. Note that mounting hardware is not included, so retain original fasteners or acquire appropriate replacements. Verify thread pitch and outlet sizes to match existing brake lines for a secure fit. Proper installation is critical for safe brake operation.

Quality Assurance and Warranty

Dorman manufactures the M39514 brake master cylinder to meet or exceed OEM specifications for Toyota Celica and Supra models. The cast iron material and precise bore diameter contribute to long-lasting performance. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the supplier for exact warranty terms.