Dorman M39376 Brake Master Cylinder

Reliable Brake Master Cylinder for Buick, Chevrolet, Oldsmobile, and Pontiac

The Dorman M39376 brake master cylinder is engineered to restore proper brake hydraulics in select Buick, Chevrolet, Oldsmobile, and Pontiac models. Designed with durable cast iron and dual bore diameters, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.

• Compatible with Buick Bonneville, Chevrolet Malibu, Monte Carlo, El Camino, Oldsmobile Cutlass series, Pontiac Grand Prix, Regal, and Riviera
• Dual master cylinder bore diameters: 24mm and 36mm for balanced braking
• Constructed from cast iron for strength and durability
• Includes reservoir for brake fluid storage
• Two outlet ports with rearward outlet size 1/2-20 and secondary outlet thread diameter 9/16-18
• Part number M39376 ensures exact replacement fit

Detailed Product Description

The Dorman M39376 brake master cylinder is a critical component in the brake hydraulics system, responsible for converting pedal force into hydraulic pressure. Featuring a cast iron body, this master cylinder offers long-lasting durability and resistance to wear. The dual bore diameters of 24mm and 36mm provide balanced pressure distribution between front and rear brakes, enhancing braking stability. The included reservoir allows for proper brake fluid containment and circulation. This master cylinder is designed with two outlets, including a rearward outlet sized 1/2-20 and a secondary outlet with a 9/16-18 thread diameter, ensuring compatibility with the brake lines on Buick Bonneville, Chevrolet Malibu, Monte Carlo, El Camino, Oldsmobile Cutlass, Cutlass Calais, Cutlass Cruiser, Cutlass Supreme, Pontiac Grand Prix, Regal, and Riviera models.

Common Applications and Issues Addressed

• Restores brake pedal firmness and responsiveness
• Eliminates brake fluid leaks from a worn or damaged master cylinder
• Resolves uneven braking caused by internal seal failure
• Prevents brake warning lights related to master cylinder malfunction
• Addresses spongy or sinking brake pedal issues

Installation Notes and Tips

• Ensure brake system is properly bled after installation to remove air
• Check compatibility with vehicle make and model before installation
• Use recommended brake fluid type for your specific vehicle
• Inspect brake lines and fittings for wear or damage during replacement
• Mounting hardware is not included and may need to be sourced separately

Quality Assurance and Warranty

Dorman manufactures the M39376 brake master cylinder to meet or exceed OEM specifications, using cast iron for durability and reliable performance. While mounting hardware is not included, the product is designed for direct fit replacement on specified Buick, Chevrolet, Oldsmobile, and Pontiac models. Warranty coverage details should be confirmed at the point of purchase or with the manufacturer.