Raybestos MC390363 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet and GMC Vans

The Raybestos Element3; New Brake Master Cylinder MC390363 is engineered to restore precise brake hydraulics in Chevrolet Express 1500, Express 2500, GMC Savana 1500, and Savana 2500 models. Designed with durable aluminum construction and exact fitment specifications, this master cylinder ensures consistent braking performance.

• Constructed from lightweight, corrosion-resistant aluminum
• Features a 1.125-inch bore size for optimal hydraulic pressure
• Includes two mounting holes with 0.433-inch diameter for secure installation
• Equipped with two ports: primary port thread 9/16"-18 and secondary port thread 1/2"-20
• Compatible with Chevrolet Express 1500/2500 and GMC Savana 1500/2500

About the Raybestos Element3; New Product Line

The Element3; New line from Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM standards. This brake master cylinder is part of that line, offering precise engineering and material quality tailored for specific vehicle applications, including Chevrolet and GMC full-size vans.

Detailed Product Description

The MC390363 brake master cylinder is crafted from aluminum to provide a balance of strength and corrosion resistance, essential for long-term brake system reliability. Its 1.125-inch bore size is designed to maintain proper hydraulic pressure, ensuring responsive brake pedal feel. The two mounting holes, each with a 0.433-inch diameter, allow for a secure and exact fit on compatible vehicles. Additionally, the master cylinder features two ports with specific thread sizes—9/16"-18 for the primary port and 1/2"-20 for the secondary port—ensuring compatibility with the brake lines on Chevrolet Express and GMC Savana models.

Common Applications and Problem Resolution

• Restores brake pressure loss in Chevrolet Express 1500 and 2500 vans
• Replaces worn or leaking master cylinders in GMC Savana 1500 and 2500
• Addresses spongy or unresponsive brake pedal issues
• Fixes brake fluid leaks from damaged or corroded master cylinders
• Improves overall brake system reliability and safety

Installation Notes and Tips

• Ensure vehicle compatibility with Chevrolet Express or GMC Savana 1500/2500 before installation
• Use proper tools to avoid damaging mounting holes or port threads
• Bleed the brake system thoroughly after installation to remove air
• Inspect brake lines and fittings for wear or damage during replacement
• Follow manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet strict quality standards, using durable aluminum materials and precise machining. While specific warranty details for part number MC390363 should be confirmed with the supplier, Raybestos products typically come with a limited warranty covering defects in materials and workmanship.