Raybestos MC390267 Brake Master Cylinder

Reliable Brake Master Cylinder for Buick, Cadillac, Oldsmobile, Pontiac

The Raybestos Element3; New Brake Master Cylinder MC390267 is engineered to restore precise brake hydraulics in select GM vehicles. Designed for durability and consistent performance, this aluminum master cylinder suits various Buick, Cadillac, Oldsmobile, and Pontiac models.

• Constructed from lightweight, corrosion-resistant aluminum
• Features a 1.000 inch bore size for accurate hydraulic pressure
• Includes 2 mounting holes with 0.433 inch diameter for secure installation
• Equipped with 2 ports, both with M12x1 thread size for compatibility
• Part number MC390267 ensures exact fit for specified vehicles

About the Raybestos Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM specifications. This brake master cylinder is part of that line, offering enhanced material quality and precise engineering to maintain brake system integrity in older GM models.

Detailed Product Description

This brake master cylinder MC390267 is crafted from aluminum, providing a balance of strength and corrosion resistance essential for brake hydraulics. The 1.000 inch bore size is designed to deliver consistent hydraulic pressure, ensuring responsive braking. With two mounting holes sized at 0.433 inches in diameter, installation is straightforward and secure. The dual ports, both threaded M12x1, allow for proper brake line connections, maintaining system integrity and fluid flow.

Compatible Vehicles and Common Applications

• Buick models including LeSabre and Park Avenue
• Cadillac models such as DeVille, Eldorado, Seville, and Fleetwood 88/98
• Oldsmobile models including LSS and Regency
• Pontiac Bonneville

Common Issues Addressed by This Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Loss of hydraulic pressure affecting braking performance
• Brake fluid leaks around the master cylinder mounting area
• Inconsistent brake pedal feel or delayed brake response
• Replacement of worn or damaged OEM master cylinders

Installation Notes and Tips

Ensure the brake system is properly bled after installation to remove air and restore full hydraulic function. Verify that mounting holes align correctly with the vehicle’s firewall or mounting bracket. Use compatible brake lines with M12x1 threaded fittings for secure connections. Inspect all seals and gaskets during installation to prevent leaks.

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet strict quality standards. The aluminum construction resists corrosion and wear, contributing to long service life. While specific warranty details may vary, Raybestos products typically include coverage against manufacturing defects to ensure reliability and customer confidence.