Dorman CM640040 Clutch Master Cylinder

Reliable Clutch Master Cylinder for Subaru Manual Transmissions

The Dorman CM640040 clutch master cylinder is designed as a standard replacement part for manual transmission systems. Engineered with a 0.625-inch bore diameter, this component ensures consistent hydraulic pressure for smooth clutch operation in Subaru Forester, Impreza, and Legacy models.

• Standard replacement grade for dependable performance
• 0.625-inch bore diameter optimized for precise hydraulic control
• Includes clutch master cylinder unit ready for installation
• Compatible with Subaru Forester, Impreza, and Legacy manual transmissions
• Part number CM640040 for accurate identification and fitment

Product Details and Specifications

The Dorman CM640040 clutch master cylinder is manufactured to meet OEM specifications, providing a reliable hydraulic interface between the clutch pedal and the transmission. The 0.625-inch bore diameter is critical for maintaining proper fluid pressure and pedal feel, ensuring consistent clutch engagement and disengagement. This part is a direct replacement designed to restore clutch system functionality in Subaru Forester, Impreza, and Legacy vehicles equipped with manual transmissions.

Compatible Vehicles and Applications

This clutch master cylinder is compatible with the following Subaru models:

• Subaru Forester (manual transmission models)
• Subaru Impreza (manual transmission models)
• Subaru Legacy (manual transmission models)

Using the correct part number CM640040 ensures proper fit and function within these specific vehicle applications.

Common Issues Addressed by This Clutch Master Cylinder

• Spongy or soft clutch pedal feel
• Difficulty shifting gears due to hydraulic pressure loss
• Clutch pedal sticking or not returning properly
• Fluid leaks from the master cylinder
• Reduced clutch engagement performance

Installation Notes and Tips

When installing the Dorman CM640040 clutch master cylinder, ensure the hydraulic system is properly bled to remove air pockets. Verify the bore diameter matches the original component to maintain correct pedal feel. Use appropriate tools to avoid damage to the cylinder or surrounding components. It is recommended to inspect the clutch slave cylinder and hydraulic lines during installation for a comprehensive system check.

Quality Assurance and Warranty

Dorman provides this clutch master cylinder as a standard replacement part manufactured to meet industry standards. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Refer to the product documentation for exact warranty terms related to part number CM640040.