489.04.0004 Scania Compatible Cylinder Head Injector Sleeve

What does a cylinder head injector sleeve do?

The cylinder head injector sleeve serves as a critical housing component within the cylinder head of diesel engines. It provides a dry bore that separates the injector from the coolant passages, ensuring that the injector remains correctly aligned on its axis at a fixed depth. By acting as a thermal bridge, it effectively conducts heat away from the injector to the coolant jacket, which is vital for maintaining stable combustion temperatures.

Compatibility with Scania engines

This component is specifically designed for use in Scania engines. It functions as a robust interface that maintains the seal between the combustion chamber and the water jacket under high-pressure conditions. Proper fitment ensures that the injector remains stable against combustion recoil and thermal expansion during operation.

Installation and maintenance guidance

When performing engine maintenance or injector replacement, technicians should inspect this sleeve for signs of wear or improper seating. Because it is a critical sealing element, it is often renewed alongside injectors to prevent coolant leakage into the combustion chamber or oil contamination. Consult your authorized distributor for installation guidance.

Preventative maintenance benefits

Maintaining the integrity of the injector sleeve is essential for preventing loss of compression or cooling system failures in heavy-duty applications.

OE cross-reference

489.04.0004 (Cylinder Head Injector Sleeve) is the equivalent of the Scania OE numbers. This part directly replaces Scania OE numbers 2256213, 2515552.