Dorman M631054 Brake Master Cylinder

Reliable Brake Master Cylinder for Buick LaCrosse and Chevrolet Malibu

The Dorman M631054 brake master cylinder is engineered to restore proper brake hydraulics for select Buick and Chevrolet models. Designed with durable cast iron construction, this master cylinder ensures consistent braking performance for your LaCrosse or Malibu.

Key Features of Dorman M631054 Brake Master Cylinder

• Constructed from cast iron for strength and durability
• Includes 2 mounting holes for secure installation
• Master cylinder bore diameter measures 1 inch
• Equipped with 2 outlets featuring M14x1.5 rearward outlet thread size
• Removable reservoir type for maintenance flexibility
• Does not include brake booster, push rod, or mounting hardware

Detailed Product Description

The Dorman M631054 brake master cylinder is designed specifically for brake hydraulics systems in Buick LaCrosse and Chevrolet Malibu vehicles. Its cast iron material provides reliable resistance to wear and corrosion, supporting long-term brake system integrity. The master cylinder features a 1-inch bore diameter and two outlets with a secondary outlet thread diameter of 14 mm and a thread pitch of 1.5, compatible with standard brake line fittings. The removable reservoir type allows for easier brake fluid inspection and servicing. Note that this part does not include a brake booster, push rod, mounting hardware, or bleeder hoses, so these components must be sourced separately if needed.

Common Applications and Issues Addressed

• Restores proper hydraulic pressure in brake systems for Buick LaCrosse and Chevrolet Malibu
• Replaces worn or leaking master cylinders causing brake fluid loss
• Eliminates spongy or unresponsive brake pedal feel
• Resolves brake fluid contamination issues related to reservoir wear
• Addresses brake system failure symptoms due to internal cylinder wear

Installation Notes and Tips

• Ensure compatibility with your specific Buick LaCrosse or Chevrolet Malibu model year before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Check all brake line fittings for proper torque and sealing
• Replace any worn or damaged mounting hardware separately, as it is not included

Quality Assurance and Warranty

Dorman manufactures the M631054 brake master cylinder to meet or exceed OEM specifications for fit and function. The cast iron construction supports durability under normal operating conditions. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.