Dorman M39486 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet Nova and Toyota Corolla

The Dorman M39486 brake master cylinder is engineered to provide consistent hydraulic pressure for your vehicle's braking system. Designed specifically for Chevrolet Nova and Toyota Corolla models, this master cylinder ensures precise brake fluid control and reliable stopping power.

• Master cylinder bore diameter: 0.875 inches for optimal hydraulic performance
• Constructed from durable aluminum material for corrosion resistance and longevity
• Includes reservoir for brake fluid, simplifying installation and maintenance
• Two outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0 for secure brake line connections
• Secondary outlet thread diameter of 10 mm to fit compatible brake lines
• Package contains the master cylinder unit; mounting hardware not included
• Sensor not included, designed for vehicles without brake fluid level sensors

Product Details and Specifications

The Dorman M39486 brake master cylinder is crafted from aluminum, providing a lightweight yet durable component that resists rust and wear. Its 0.875-inch bore diameter is calibrated to deliver consistent hydraulic pressure, essential for effective brake operation. The included reservoir allows for proper brake fluid storage and circulation, reducing the risk of air entering the system. Featuring two outlets, this master cylinder supports dual-circuit braking systems, with a rearward outlet sized M10 x 1.0 and a secondary outlet thread diameter of 10 mm, both with a 1.0 thread pitch to ensure compatibility with factory brake lines.

Compatible Vehicles and Applications

This brake master cylinder is compatible with select Chevrolet Nova and Toyota Corolla models, making it a suitable replacement part for maintaining or restoring brake system functionality. The Dorman M39486 is ideal for vehicles requiring a master cylinder with the specified bore diameter and outlet configurations.

• Restores proper brake fluid pressure and pedal feel
• Addresses brake fluid leaks from a worn or damaged master cylinder
• Eliminates spongy or unresponsive brake pedal issues
• Replaces master cylinders with corroded or damaged reservoirs
• Supports dual-circuit brake systems requiring two outlet ports

Installation Notes and Tips

Installation of the Dorman M39486 brake master cylinder requires careful attention to brake line connections and proper bleeding of the brake system to remove air. Since mounting hardware is not included, retain or source compatible fasteners for secure installation. Verify thread sizes and pitch to ensure proper fitment of brake lines. It is recommended to inspect all brake components during installation and replace any worn parts to maintain system integrity.

Quality Assurance and Warranty

Dorman manufactures the M39486 brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction offers corrosion resistance for extended service life. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.