Raybestos MC39870 Brake Master Cylinder

Reliable Brake Master Cylinder for Pontiac LeMans

The Raybestos Element3; New Brake Master Cylinder MC39870 is engineered to restore precise brake hydraulics for your Pontiac LeMans. Designed with durable aluminum construction and specific mounting features, this master cylinder ensures consistent braking performance.

• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.343-inch diameter for secure installation
• 0.813-inch bore size optimized for brake fluid pressure control
• Four ports including M10x1 primary and M12x1 secondary port threads
• Compatible specifically with Pontiac LeMans models

Detailed Specifications and Features

This Raybestos brake master cylinder (part number MC39870) features a robust aluminum body that offers strength and resistance to corrosion, essential for brake hydraulics longevity. The unit includes two mounting holes sized at 0.343 inches in diameter, ensuring a precise fit on the Pontiac LeMans brake system. The 0.813-inch bore size is designed to provide optimal hydraulic pressure for effective braking response. Additionally, the master cylinder has four ports, with primary and secondary port threads sized M10x1 and M12x1 respectively, facilitating proper brake line connections.

About the Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components with modern materials and precise engineering. This product line emphasizes durability and fitment accuracy, making it suitable for restoring or maintaining brake systems on classic vehicles like the Pontiac LeMans. The MC39870 master cylinder is part of this line, combining updated materials with OEM-style specifications.

Common Applications and Problem Resolution

• Replacement for worn or leaking brake master cylinders on Pontiac LeMans
• Restores proper hydraulic pressure for consistent brake pedal feel
• Eliminates brake fluid leaks caused by damaged ports or seals
• Addresses brake system failure due to internal bore wear
• Improves overall brake system reliability and safety

Installation Notes and Tips

Ensure the mounting holes align correctly with the vehicle’s brake booster or firewall. Use the specified 0.343-inch diameter mounting holes for secure attachment. Verify that the primary and secondary brake lines match the M10x1 and M12x1 port threads to avoid leaks. Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic function.

Quality Assurance and Warranty

Raybestos manufactures the MC39870 brake master cylinder to meet strict quality standards, using aluminum for corrosion resistance and durability. While specific warranty details are not provided here, Raybestos products typically come with manufacturer-backed warranties to ensure reliability and customer confidence.