Raybestos MC390178 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, Oldsmobile, Pontiac

The Raybestos Element3; New Brake Master Cylinder MC390178 is engineered to restore precise brake hydraulics for select GM minivans. Designed specifically for Chevrolet Lumina APV, Oldsmobile Silhouette, and Pontiac Trans Sport models, this master cylinder ensures consistent brake fluid pressure and system integrity.

• Constructed from durable aluminum for corrosion resistance and longevity
• Features a 24.000 mm bore size for optimal hydraulic performance
• Includes 2 mounting holes with a diameter of 0.433 inches for secure installation
• Equipped with 4 ports and M10x1 primary port thread for versatile brake line connections
• Part number MC390178 ensures exact fitment for specified GM minivans

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 precise engineering and material quality tailored for GM vehicles like the Chevrolet Lumina APV, Oldsmobile Silhouette, and Pontiac Trans Sport. The use of aluminum material and exact bore sizing reflects the line’s commitment to durability and performance in brake system components.

Detailed Product Description

This brake master cylinder MC390178 is designed with a 24.000 mm bore size to provide consistent hydraulic pressure necessary for effective braking. The aluminum construction offers resistance to corrosion and heat, which is critical for maintaining brake system reliability over time. With 2 mounting holes sized at 0.433 inches, installation is secure and aligns with factory specifications. The 4 ports, including a primary port with M10x1 threading, allow for proper brake line connections, ensuring compatibility with the brake hydraulics system of Chevrolet Lumina APV, Oldsmobile Silhouette, and Pontiac Trans Sport models.

Common Applications and Issues Addressed

• Restores brake fluid pressure in Chevrolet Lumina APV, Oldsmobile Silhouette, and Pontiac Trans Sport
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid leaks that reduce braking efficiency
• Addresses inconsistent brake pedal feel due to internal cylinder wear
• Ensures proper hydraulic function after brake system repairs or upgrades

Installation Notes and Tips

• Verify compatibility with Chevrolet Lumina APV, Oldsmobile Silhouette, or Pontiac Trans Sport before installation
• Ensure brake system is fully bled after installation to remove air from hydraulic lines
• Use proper torque specifications on the 2 mounting holes to avoid damage
• Inspect brake lines and fittings for wear or damage during installation
• Follow manufacturer guidelines for brake fluid type and maintenance

Quality Assurance and Warranty

Raybestos manufactures the MC390178 brake master cylinder to meet stringent quality standards, ensuring reliable performance in brake hydraulics. The Element3; New product line is designed to meet or exceed OEM specifications for fit, form, and function. Warranty coverage details should be confirmed with the product documentation or authorized distributor.