HomeTransmission > Manual Transmission ComponentsDorman CM640018 Clutch Master Cylinder
Part #: CM640018

Dorman CM640018 Clutch Master Cylinder

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⚙️ 12 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet and Pontiac, Cavalier and Sunfire
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Reliable Clutch Master Cylinder for Chevrolet Cavalier and Pontiac Sunfire

The Dorman CM640018 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 Chevrolet Cavalier and Pontiac Sunfire models.

  • Standard replacement grade for dependable performance
  • 0.625-inch bore diameter for precise hydraulic control
  • Includes clutch master cylinder unit ready for installation
  • Compatible with Chevrolet Cavalier and Pontiac Sunfire manual transmissions
  • Manufactured by Dorman, a trusted name in automotive components

Product Details and Specifications

The Dorman CM640018 clutch master cylinder is built to meet OEM specifications, providing a direct fit for Chevrolet Cavalier and Pontiac Sunfire vehicles equipped with manual transmissions. The 0.625-inch bore diameter is critical for maintaining proper hydraulic pressure, which directly affects clutch engagement and disengagement. This standard replacement part is designed to restore clutch system functionality without requiring modifications or additional components.

Common Applications and Problem Resolution

  • Restores clutch hydraulic pressure for smooth pedal operation
  • Eliminates clutch pedal sponginess or sinking issues
  • Resolves fluid leaks from a worn or damaged master cylinder
  • Prevents clutch disengagement failure during gear shifts
  • Addresses inconsistent clutch pedal feel in Chevrolet Cavalier and Pontiac Sunfire

Installation Notes and Tips

Installation of the Dorman CM640018 clutch master cylinder requires basic mechanical skills and tools. It is important to properly bleed the clutch hydraulic system after installation to remove air and ensure optimal performance. Verify compatibility with your specific Chevrolet Cavalier or Pontiac Sunfire model year before installation. Follow vehicle manufacturer guidelines for torque specifications and safety precautions.

Quality Assurance and Warranty Information

Dorman manufactures the CM640018 clutch master cylinder to meet industry standards for durability and reliability. This part undergoes quality control inspections to ensure consistent performance. While specific warranty terms may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for detailed warranty information.

BrandDorman
Part NumberCM640018
Bore Diameter0.625
Item GradeStandard Replacement
Package ContentsClutch Master Cylinder

This part fits 12 vehicles. Search below:

YearMakeModelPositionNotes
2005ChevroletCavalierN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2005PontiacSunfireN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004ChevroletCavalierN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2004PontiacSunfireN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2003ChevroletCavalierN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2003PontiacSunfireN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2002ChevroletCavalierN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2002PontiacSunfireN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2001ChevroletCavalierN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2001PontiacSunfireN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2000ChevroletCavalierN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.
2000PontiacSunfireN/ACompatible with drum brake wheel cylinders featuring a 5/8" bore size.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

12572802136.62032800048CM141013CM1443CM452160LMC465M0451

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.