OE Quality
60-Day Returns

Dorman CM640039 Clutch Master Cylinder
Reliable Clutch Master Cylinder for Hyundai Elantra and Tiburon
The Dorman CM640039 clutch master cylinder is designed to restore proper clutch function in your Hyundai Elantra or Tiburon. Engineered with a 0.625-inch bore diameter and M10 x 1.0 outlet thread size, this standard replacement part ensures consistent hydraulic pressure for smooth clutch operation.
- Bore diameter: 0.625 inches for precise hydraulic control
- Outlet thread size: M10 x 1.0 for secure fluid connection
- Port thread diameter: 10 mm for compatibility with OEM fittings
- Standard replacement grade for reliable performance
- Includes clutch master cylinder component only
Product Details and Specifications
The Dorman CM640039 clutch master cylinder is manufactured to meet OEM specifications, providing a direct fit for Hyundai Elantra and Tiburon models. Its 0.625-inch bore diameter is critical for maintaining the correct hydraulic pressure needed to engage and disengage the clutch smoothly. The outlet thread size of M10 x 1.0 and port thread diameter of 10 mm ensure compatibility with the vehicle’s hydraulic lines, minimizing the risk of leaks or improper fitment. This part is classified as a standard replacement, making it suitable for restoring original clutch system performance without modification.
Compatible Vehicles and Common Applications
- Hyundai Elantra clutch hydraulic system repair
- Hyundai Tiburon manual transmission clutch maintenance
- Replacement for worn or leaking clutch master cylinders
- Resolving clutch pedal sponginess or failure to disengage
- Addressing hydraulic fluid leaks in clutch system
Installation Notes and Tips
When installing the Dorman CM640039 clutch master cylinder, ensure the hydraulic lines are properly connected to the M10 x 1.0 outlet threads and 10 mm port threads to prevent leaks. Bleed the clutch hydraulic system thoroughly after installation to remove air and restore proper pedal feel. Verify the bore diameter matches the original component to maintain correct hydraulic pressure. Use appropriate tools to avoid damaging threads during installation.
Quality Assurance and Warranty Information
Dorman manufactures the CM640039 clutch master cylinder to meet industry standards for durability and fitment. This part undergoes quality control inspections to ensure reliable operation in Hyundai Elantra and Tiburon vehicles. While specific warranty details are not provided, Dorman parts typically come with a limited warranty against defects in materials and workmanship.
| Brand | Dorman |
| Part Number | CM640039 |
| Bore Diameter | 0.625 |
| Item Grade | Standard replacement |
| Outlet Thread Size | M10 x 1.0 |
| Package Contents | Clutch master cylinder |
| Port Thread Diameter | 10 |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004 | Hyundai | Elantra | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2004 | Hyundai | Tiburon | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2003 | Hyundai | Elantra | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2003 | Hyundai | Tiburon | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2002 | Hyundai | Elantra | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2001 | Hyundai | Elantra | N/A | Compatible 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.