Dorman M39586 Brake Master Cylinder

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

The Dorman M39586 brake master cylinder is engineered to restore proper brake hydraulics in select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and responsive braking performance.

• Master cylinder bore diameter: 24 mm for accurate hydraulic control
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir and sensor for integrated brake fluid management
• Features four outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Thread pitch of 1.0 for secure fitting

Detailed Product Description

The Dorman M39586 brake master cylinder is designed specifically for vehicles such as the Buick Century, Chevrolet Celebrity, Oldsmobile Cutlass Ciera, and Pontiac 6000. Its 24 mm bore diameter provides precise hydraulic pressure control, essential for maintaining brake system integrity. Manufactured from aluminum, this master cylinder offers enhanced durability and resistance to corrosion compared to traditional materials. The included reservoir and sensor allow for seamless integration with the vehicle’s brake fluid system, ensuring accurate fluid level monitoring and consistent brake performance. With four outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with M12 x 1.0 thread diameter, this master cylinder supports complex brake line configurations common in the specified vehicle models.

Common Applications and Problem Resolution

• Restores brake pressure in Buick Century and Chevrolet Celebrity brake systems
• Replaces worn or leaking master cylinders in Oldsmobile Cutlass Ciera
• Addresses brake fluid leaks and sensor malfunctions in Pontiac 6000 models
• Improves brake pedal feel and responsiveness
• Eliminates inconsistent brake fluid delivery caused by damaged master cylinders

Installation Notes and Tips

Installation of the Dorman M39586 brake master cylinder requires careful attention to brake line connections and sensor wiring. Ensure the brake fluid reservoir is properly seated and all outlet threads (M10 x 1.0 and M12 x 1.0) are securely tightened to prevent leaks. Bleed the brake system thoroughly after installation to remove air and restore optimal brake function. This master cylinder does not include mounting hardware, so retain original components or source compatible hardware as needed.

Quality Assurance and Warranty

Dorman manufactures the M39586 brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and integrated sensor contribute to long-term reliability. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.