Volvo
Cylinder head for Volvo D11
This cylinder head is designed for the Volvo D11 engine. It mounts to the top of the engine block to seal the combustion chambers and house the valve train components.
Compatible models
Specifications
- Part number
- 20938806
- Brand
- Volvo
The cylinder head 20938806 serves as the upper closure for the Volvo D11 engine block. It creates a seal for the combustion chambers where ignition and gas expansion occur. The component integrates intake and exhaust ports, valve seats, and housings for valve actuation mechanisms, as well as openings for fuel injectors. It manages the flow of air and fuel into the cylinders and the exit of exhaust gases from the engine.
This part is specifically engineered for the Volvo D11 engine, commonly found in heavy-duty trucks, buses, and construction equipment. It is designed to withstand the internal pressures and thermal loads generated during engine operation to maintain compression and facilitate heat dissipation. Proper installation and sealing of the cylinder head are necessary to ensure the engine maintains its intended power output and operational efficiency.
In internal combustion engines, the cylinder head provides the structural housing for the valves and ports. It is responsible for containing the combustion process while allowing for the precise timing of gas exchange required for the engine cycle. By maintaining a seal against the engine block, the cylinder head ensures that the compression ratio remains consistent across all cylinders.

