489.03.0003 Volvo Compatible Injector Sleeve

The cylinder head injector sleeve acts as a dry housing tube fitted into the cylinder head to separate the injector from the coolant passages in diesel engines. It keeps the injector on the correct axis and at a fixed depth while maintaining the vital seal between the combustion chamber and the water jacket. By conducting heat from the injector to the coolant, it also serves as an essential thermal bridge within the engine assembly.

This component is designed for compatibility with various Volvo engine families, including those found in Volvo F10, F12, F7, FL10, FL12, N10, N12, NL10, NL12, B10B, B10M, and B12 models. It ensures optimal performance for heavy commercial vehicle engines by maintaining structural integrity under high thermal loads.

For professional installation, ensure the cylinder head bore is clean and free of debris. The sleeve must be seated precisely to prevent leaks between the combustion chamber and the water jacket. Technicians should verify that the seating surface is undamaged and consider renewing seals during any injector or cylinder head service to maintain system pressure.

Consult your authorized distributor.

OE cross-reference

489.03.0003 (Cylinder Head Injector Sleeve) is the equivalent of the Volvo OE numbers. This part directly replaces Volvo OE numbers 273821, 276130.