A4571800443 Mercedes-Benz Compatible Housing Oil Nozzle

What does a housing oil nozzle do?

This housing oil nozzle is a critical component within the engine crankcase system, designed to direct pressurized oil toward the underside of the piston. By spraying oil onto the piston skirt, it effectively carries heat away from the combustion chamber and helps maintain thermal balance, which is vital for preventing piston ring sticking in heavy-duty diesel engines.

Vehicle and engine compatibility

This part is specifically fitted to Mercedes-Benz engines. Proper selection is essential, as these nozzles must match the specific spray configuration and tube angle required by the engine code to ensure oil reaches the piston base rather than the cylinder liner wall.

Installation and maintenance guidance

When replacing this component, technicians should verify the connection style—whether it is a bolted flange, banjo-connected, or threaded body—to ensure a secure fit. Checking the spray tube angle and valve opening pressure against the original part is recommended to prevent oil leakage or pressure drops in the main gallery.

Troubleshooting and selection

Maintaining these nozzles ensures efficient piston pin lubrication and prevents overheating during high load operations. For accurate fitment, always verify compatibility with the specific engine model used in the vehicle.

OE cross-reference

0101 034 (Housing Oil Nozzle Crankcase) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A4571800443.