Dorman CM640227 Clutch Master Cylinder

Dorman CM640227 Clutch Master Cylinder

Dorman CM640227 is a direct replacement clutch master cylinder for manual transmission applications that need a reliable hydraulic restore. It is precision-engineered to match the original equipment design for specific Nissan 370Z and INFINITI G35 vehicles.

Key Features

• Direct replacement clutch master cylinder for manual transmission systems
• Aluminum construction with a grey finish
• 0.688 in bore size for OE-style hydraulic operation
• Single outlet with threaded M10-1.0 connection
• Piston-type cylinder design
• Standard replacement grade, not pre-bled or pre-filled
• Single remote reservoir type; reservoir not included
• Package includes 1 clutch master cylinder

Detailed Description

This Dorman clutch master cylinder, part number CM640227, is built for direct-fit replacement in manual transmission vehicles that use an OE-style hydraulic clutch setup. The aluminum body, threaded outlet, and 0.688 in bore size are specified to align with the original design used on select Nissan 370Z and INFINITI G35 applications. This part cross-references LuK LMC607 for the same application.

Compatible With 2009-2020 Nissan 370Z and 2007-2008 INFINITI G35. Use CM640227 when replacing a leaking or malfunctioning clutch master cylinder in these manual transmission vehicles.

Common Repair Symptoms

• Clutch pedal sinks or loses hydraulic pressure
• Fluid leakage at the master cylinder
• Hard or inconsistent clutch pedal feel
• Difficulty disengaging the clutch
• Shifting problems caused by hydraulic failure

Installation Notes and Tips

Verify the bore size, outlet thread size, and reservoir configuration before installation. Because this unit is not pre-bled or pre-filled, the clutch hydraulic system must be bled after installation. Confirm vehicle-specific fitment for your Nissan 370Z or INFINITI G35 before ordering.

Quality Assurance

Dorman designs this replacement to match the original equipment layout for the listed applications, supporting a straightforward repair on compatible manual transmission vehicles. Part number CM640227 is intended for direct replacement use where the original clutch master cylinder has failed.