Dorman M39621 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet Corvette

The Dorman M39621 Brake Master Cylinder is engineered to provide consistent brake performance for Chevrolet Corvette vehicles. Designed with precision, this master cylinder ensures proper hydraulic pressure for safe and effective braking.

• Aluminum master cylinder construction for durability and corrosion resistance
• Single reservoir type included for fluid storage
• Master cylinder bore diameter of 0.875 inches for accurate hydraulic control
• Includes master cylinder cap and reservoir for a complete assembly
• Three outlet ports with a rearward outlet size of M12 x 1.0 and thread pitch of 1.0
• Two mounting holes for secure installation

Product Details and Specifications

This Dorman brake master cylinder (part number M39621) is specifically designed for Chevrolet Corvette models, ensuring compatibility and reliable fitment. The aluminum material offers strength while resisting corrosion, extending the service life of the component. The single reservoir design simplifies brake fluid management, and the included master cylinder cap helps maintain system integrity. With a bore diameter of 0.875 inches, this master cylinder provides precise hydraulic pressure to the brake system. It features three outlets, including a rearward outlet sized M12 x 1.0, accommodating the necessary brake line connections. Note that mounting hardware, push rod, brake booster, bleeder hoses, sensor, and mounting bracket are not included with this part.

Common Applications and Problem Resolution

• Restores proper brake pedal feel and hydraulic pressure in Chevrolet Corvette brake systems
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses spongy or unresponsive brake pedal issues
• Eliminates brake fluid contamination by providing a new reservoir and cap
• Resolves brake system leaks related to master cylinder failure

Installation Notes and Tips

When installing the Dorman M39621 master cylinder, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Verify that the mounting holes align correctly with the vehicle’s brake booster or firewall. Since mounting hardware and push rod are not included, reuse existing components or source compatible parts as needed. Inspect brake lines and fittings for wear or damage during installation to ensure a secure and leak-free connection.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship. Refer to Dorman’s official documentation for complete warranty information.