VCDi are a range of turbocharged diesel engines powered by a equipped with a common rail injection system. They have been installed in Chevrolet models since 2006. They were originally manufactured by the VM Motori company. These engines have been produced by General Motors since 2010.
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Features of VCDi engines
These engines have 4 cylinders with 16 valves. The engine block is made of cast iron and the cylinder head is made of aluminium. The valve control unit has either a belt or a chain. Each version is equipped with a variable geometry turbocharger, which improves performance.
The technical_specifications of VCDi motors
| <Engine index | Displacement, l | Max. Power, hp | Max. torque, Nm | Year of manufacture | Models equipped with this type of engine |
| Z20S (Z20DMH, LLW) | 2.0 | 150 | 320 | 2006 | Captiva C100; Cruze J300; Epica V250. |
| Z20S1 (Z20DM, LMN) | 2.0 | 121‒127 | 280-300 | 2006 | Captiva C100; Lacetti J200. |
| Z20D1 (LNP) | 2.0 | 163 | 350-360 | 2010 | Cruze J300; Orlando J309; Malibu. |
| Z22D1 (LNQ) | 2.2 | 163-184 | 350-400 | 2010 | Captiva C140. |
Common defects of VCDi motors
| Defects | Motor |
| Fuel system components are extremely sensitive to fuel quality. | Z20S (Z20DMH, LLW); Z20D1 (LNP); Z20S1 (Z20DM, LMN). |
| The valve timing belt has a short lifespan. | Z20S (Z20DMH, LLW); Z20S1 (Z20DM, LMN). |
| The valve timing chain wears out quickly. | Z22D1 (LNQ); Z20D1 (LNP). |
| The turbocharger often fails. | Z20D1 (LNP). |
| The diesel particulate filter clogs quickly. | Z20D1 (LNP). |