A4421800343 Housing Oil Nozzle for Mercedes-Benz

What does a housing oil nozzle do?

This housing oil nozzle plays a vital role in the engine's lubrication and cooling system by directing pressurized oil onto the underside of the piston. By spraying oil directly onto the piston skirt, it helps dissipate heat from the combustion chamber, preventing thermal fatigue and ensuring the longevity of engine components under heavy loads.

Vehicle and engine compatibility

This specific component is compatible with Mercedes-Benz engines. It is engineered to meet the precise requirements of heavy commercial vehicle applications, ensuring that the spray pattern reaches the piston base accurately to maintain thermal balance and reduce friction at the piston pin.

Installation and maintenance guidance

When replacing this part, it is essential to verify the connection style—whether it be a bolted flange, banjo connection, or threaded body—to ensure a proper seal. Technicians should always cross-reference the engine code and the existing nozzle geometry to prevent incorrect spray angles that could lead to oil leakage or insufficient cooling.

Selection and troubleshooting

Proper installation ensures that the check valve maintains correct gallery pressure at idle while providing adequate cooling as engine speed increases.

OE cross-reference

0101 026 (Housing Oil Nozzle Crankcase) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A4421800343.