Dorman M39547 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet I-Mark and Isuzu Spectrum

The Dorman M39547 brake master cylinder is engineered to provide consistent hydraulic pressure for your vehicle's braking system. Designed specifically for Chevrolet I-Mark and Isuzu Spectrum models, this master cylinder ensures proper brake function and safety.

• Master cylinder bore diameter: 0.813 inches for precise hydraulic control
• Constructed from durable cast iron for long-lasting performance
• Includes three outlets to accommodate complex brake line configurations
• Rearward outlet size: M10 x 1.0 thread for secure fitting
• Secondary outlet thread diameters: M10 x 1.0 and M16 x 1.5 for versatile brake line connections
• Package contains the master cylinder only; mounting hardware and reservoir are not included
• No sensor included, compatible with existing vehicle brake sensor systems

Product Details and Specifications

The Dorman M39547 brake master cylinder is made from cast iron, providing strength and resistance to wear under high-pressure braking conditions. Its 0.813-inch bore diameter is designed to deliver consistent hydraulic pressure, essential for effective brake operation. This master cylinder features three outlets, including a rearward outlet with an M10 x 1.0 thread size and secondary outlets with M10 x 1.0 and M16 x 1.5 thread diameters, allowing for compatibility with the brake line configurations found on Chevrolet I-Mark and Isuzu Spectrum vehicles. Note that this unit does not include a reservoir or mounting hardware, so these components must be sourced separately if needed.

Common Applications and Problem Resolution

• Restores proper hydraulic pressure in the brake system
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses spongy or unresponsive brake pedal issues
• Fixes brake fluid contamination or internal seal failure
• Supports brake system maintenance on Chevrolet I-Mark and Isuzu Spectrum models

Installation Notes and Tips

Installation of the Dorman M39547 brake master cylinder requires careful attention to brake line connections and proper bleeding of the brake system to remove air. Since mounting hardware and reservoir are not included, ensure these parts are compatible and in good condition before installation. It is recommended to consult the vehicle’s service manual for torque specifications and brake bleeding procedures to maintain system integrity and safety.

Quality Assurance and Warranty

Dorman manufactures the M39547 brake master cylinder to meet or exceed OEM standards for fit and function on Chevrolet I-Mark and Isuzu Spectrum vehicles. While specific warranty details should be confirmed at the point of purchase, Dorman products typically come with a limited warranty covering defects in materials and workmanship to provide confidence in product reliability.