Dorman M390024 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford, Lincoln, and Mercury Vehicles

The Dorman M390024 brake master cylinder is engineered to provide consistent hydraulic pressure for your vehicle's braking system. Designed specifically for select Ford, Lincoln, and Mercury models, this master cylinder ensures dependable performance without including a reservoir or sensor.

Key Features of the Dorman M390024 Brake Master Cylinder

• Constructed from durable cast iron for long-lasting strength
• Master cylinder bore diameter of 1 inch for precise hydraulic control
• Equipped with two outlets: rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Thread pitch of 1.0 for secure fitting
• Includes the master cylinder only; mounting hardware and reservoir are not included

Detailed Product Description

This Dorman brake master cylinder (part number M390024) is designed to meet the hydraulic braking needs of Ford, Lincoln, and Mercury vehicles such as the Continental, Crown Victoria, Grand Marquis, Sable, Taurus, and Town Car. The cast iron construction provides durability and resistance to wear, while the 1-inch bore diameter ensures effective pressure delivery to the brake system. With two outlets featuring specific thread sizes (M10 x 1.0 rearward outlet and M12 x 1.0 secondary outlet), this master cylinder is engineered for precise compatibility with the brake lines of these models. Note that this unit does not include a reservoir or sensor, so those components must be sourced separately if needed.

Common Applications and Issues Addressed

• Restores proper hydraulic pressure in braking systems for Ford Crown Victoria and Lincoln Town Car
• Replaces worn or leaking master cylinders causing brake fluid loss
• Eliminates spongy or unresponsive brake pedal feel in Mercury Sable and Ford Taurus
• Addresses brake failure symptoms due to internal seal wear or bore damage
• Supports brake system maintenance on Grand Marquis and Continental models

Installation Notes and Tips

• Ensure brake fluid reservoir and sensors are compatible and installed separately as this unit does not include them
• Verify thread pitch and outlet sizes (M10 x 1.0 and M12 x 1.0) match your vehicle’s brake line fittings
• Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic function
• Consult vehicle-specific service manuals for torque specifications and mounting procedures

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit and function. The cast iron material and precise machining contribute to reliable performance in demanding braking applications. While specific warranty details are not provided here, Dorman products typically come with a limited warranty against defects in materials and workmanship. Refer to Dorman’s official documentation for complete warranty terms.