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Dorman CM640078 Clutch Master Cylinder
| Brand | Dorman CM640078 |
|---|---|
| Bore Diameter | 0.625 |
| Item Grade | Standard Replacement |
| Package Contents | Clutch Master Cylinder |
| Fits | Chevrolet, Pontiac, and Daewoo · 16 vehicles |
Direct replacement. Precision-engineered to match the original equipment design.
Standard replacement. A dependable clutch master cylinder for restoring hydraulic operation.
Cross-references AMS Automotive M1202, LuK LMC617 and PERFECTION 800044 for the same application. See all 9.
Clutch Master Cylinder for Select Chevrolet and Pontiac Models
Dorman CM640078 is a standard replacement clutch master cylinder engineered to match the original equipment design for specific vehicle applications. It is built for drivers replacing a leaking or malfunctioning hydraulic clutch master cylinder on select Chevrolet Aveo and Pontiac G3 models.
- 0.625 bore diameter for the specified hydraulic application
- Standard replacement grade for direct-fit service
- Precision-engineered to match OE design details
- Direct replacement for select manual transmission systems
- Package contents: clutch master cylinder
Fitment and Application Details
Fits 2017-2018 Chevrolet Aveo, N/A. Fits 2006-2016 Chevrolet Aveo, N/A; compatible with drum brake wheel cylinders featuring a 5/8" bore size. Fits 2007-2009 Pontiac G3, N/A; compatible with drum brake wheel cylinders featuring a 5/8" bore size. Dorman CM640078 is a focused replacement for manual transmission hydraulic clutch service on these applications, and the CM640078 part number is commonly searched for OE-style replacement needs.
This part cross-references AMS Automotive M1202 for the same application.
Common Problems This Part Can Address
- Clutch fluid leakage from a worn master cylinder
- Soft, inconsistent, or failing clutch pedal hydraulic response
- Difficulty disengaging the clutch during shifting
- Loss of hydraulic pressure in the clutch system
- Replacement need after internal seal or bore wear
Installation Notes and Tips
Verify bore diameter, vehicle year, and model before installation. Inspect the hydraulic line, reservoir connection, and related clutch components for wear or contamination before installing the new master cylinder. After installation, bleed the clutch hydraulic system according to the vehicle service procedure to restore proper pedal feel.
Quality Assurance
Dorman designs this clutch master cylinder as a direct replacement for the original equipment layout on the listed applications. The CM640078 is built to standard replacement specifications for service on select Chevrolet Aveo and Pontiac G3 manual transmission systems.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2018 | Chevrolet | Aveo | N/A | — |
| 2017 | Chevrolet | Aveo | N/A | — |
| 2016 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2015 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2014 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2013 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2012 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2011 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2010 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2009 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2009 | Pontiac | G3 | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2008 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2008 | Pontiac | G3 | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2007 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2007 | Pontiac | G3 | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
| 2006 | Chevrolet | Aveo | N/A | Compatible with drum brake wheel cylinders featuring a 5/8" bore size. |
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