Scania
Cylinder liner for Scania D7A/ B
This cylinder liner is designed for the Scania D7A and D7B engine series. It provides the internal surface for piston movement and combustion chamber sealing, identified by part number 421430P04.
Compatible models
Specifications
- Part number
- 421430P04
- Brand
- Scania
The cylinder liner is a component that forms the internal wall of the engine cylinder where the piston travels. It serves as the primary surface for the piston rings to slide against while containing the combustion process. This component is engineered to facilitate the transfer of heat from the combustion chamber to the engine cooling system, maintaining thermal stability within the engine block.
This specific liner is compatible with Scania D7A and D7B engines. It is manufactured to precise dimensional standards to ensure proper fitment within the engine block and to maintain the required compression levels during operation. By providing a controlled surface for the piston assembly, the liner prevents direct wear on the engine block itself.
Cylinder liners are used in internal combustion engines to create a replaceable wear surface. They allow for the restoration of engine tolerances during an overhaul without requiring the replacement of the entire engine block. By maintaining a consistent seal, the liner supports the efficiency of the power cycle and helps manage oil consumption.

