Raybestos MC390985 Brake Master Cylinder

Overview of Raybestos MC390985 Brake Master Cylinder

The Raybestos Element3; New Brake Master Cylinder MC390985 is engineered for reliable brake hydraulics performance. Designed specifically for Chevrolet and Pontiac models, this master cylinder ensures precise brake fluid control and consistent stopping power.

• Constructed from durable aluminum for lightweight strength
• Two mounting holes with 0.354-inch diameter for secure installation
• 0.875-inch bore size optimized for brake fluid pressure
• Two ports with M10x1 and M12x1 thread sizes for compatibility with brake lines
• Compatible with Chevrolet Cobalt, Pontiac G4, G5, and Pursuit models

Element3; New Product Line Details

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components with precise engineering. This brake master cylinder is part of that line, featuring aluminum construction and exact port threading to meet OEM specifications. The Element3; New series is designed to provide consistent brake fluid delivery and durability for specific vehicle applications.

Detailed Product Description

The MC390985 brake master cylinder is crafted from aluminum, offering a balance of strength and corrosion resistance. It features two mounting holes, each with a diameter of 0.354 inches, ensuring a secure fit in the brake system assembly. The 0.875-inch bore size is calibrated to maintain proper hydraulic pressure for effective braking. With two ports, the primary port thread is M10x1 and the secondary port thread is M12x1, allowing compatibility with the brake lines of Chevrolet Cobalt, Pontiac G4, G5, and Pursuit vehicles. This part number MC390985 is designed to meet the exact specifications required for these models, supporting safe and reliable brake system operation.

Common Applications and Issues Addressed

• Replacement for worn or leaking brake master cylinders in Chevrolet Cobalt and Pontiac G4, G5, Pursuit
• Restores proper brake fluid pressure and pedal feel
• Eliminates brake fluid leaks caused by damaged seals or corrosion
• Resolves inconsistent braking performance due to master cylinder failure
• Supports brake system maintenance and safety compliance

Installation Notes and Tips

• Ensure compatibility with Chevrolet Cobalt, Pontiac G4, G5, and Pursuit before installation
• Verify mounting hole alignment and secure with appropriate hardware
• Check port thread sizes (M10x1 and M12x1) for brake line fitting compatibility
• Bleed the brake system thoroughly after installation to remove air
• Follow vehicle manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

Raybestos manufactures the MC390985 brake master cylinder to meet industry standards for brake hydraulics components. The aluminum construction and precise machining ensure durability and performance. While specific warranty details are not provided here, Raybestos products typically come with a limited warranty against defects in materials and workmanship. Always consult product documentation or contact the manufacturer for exact warranty terms.