Raybestos MC390259 Brake Master Cylinder

Overview of Raybestos Element3; New Brake Master Cylinder MC390259

The Raybestos Element3; New Brake Master Cylinder MC390259 is engineered for reliable brake hydraulics performance in select GM and Dodge trucks and SUVs. Designed with precision, this aluminum master cylinder ensures consistent braking response for vehicles like the Chevrolet C1500 and the Dodge Ram 1500.

• Constructed from durable aluminum for corrosion resistance
• Features a 1.125-inch bore size for optimal hydraulic pressure
• Includes 2 mounting holes with a diameter of 0.433 inches for secure installation
• Equipped with 4 ports: primary port thread 9/16"-23 and secondary port thread 1/2"-20
• Compatible with multiple models from Cadillac, Chevrolet, Dodge, and GMC

Detailed Product Description

The MC390259 brake master cylinder from Raybestos is part of the Element3; New product line, which focuses on delivering reliable brake hydraulics components with precise engineering. This master cylinder is made from aluminum, providing a lightweight yet durable solution that resists corrosion and wear. The 1.125-inch bore size is designed to maintain proper hydraulic pressure, ensuring effective brake fluid transfer. With two mounting holes sized at 0.433 inches in diameter, installation is straightforward and secure. The unit features four ports, including a primary port with a 9/16"-23 thread and a secondary port with a 1/2"-20 thread, allowing compatibility with various brake line fittings.

Compatible Vehicles and Applications

This brake master cylinder is compatible with a range of trucks and SUVs, including:

• Cadillac Escalade
• Chevrolet C1500, C1500 Suburban, C2500, C2500 Suburban, Suburban 1500, Tahoe
• Dodge Ram 1500
• GMC K1500, K1500 Suburban, K2500, K2500 Suburban, Yukon

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 contamination or corrosion inside the master cylinder
• Inconsistent brake pedal feel or delayed brake response
• Replacement of worn or damaged original equipment master cylinders

Installation Notes and Tips

• Ensure the mounting holes align properly with the vehicle’s brake booster or firewall
• Use compatible brake lines matching the primary and secondary port thread sizes
• Bleed the brake system thoroughly after installation to remove air
• Inspect brake fluid condition and replace if contaminated
• Follow manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet or exceed OEM specifications. The aluminum construction provides durability and corrosion resistance for extended service life. While specific warranty details for part number MC390259 should be confirmed at the point of purchase, Raybestos products typically come with a limited warranty covering defects in material and workmanship.