This injection nozzle delivers fuel into the engine cylinder at the calibrated pressure and spray pattern required for proper combustion. It is the terminal component of the fuel-injection system, receiving pressurized fuel from the injection line and atomizing it directly into the combustion chamber. A worn or clogged nozzle causes incomplete atomization, leading to misfire, increased exhaust smoke, and reduced power output. The nozzle is manufactured by Bosch to match the original assembly's internal geometry, ensuring the spray pattern aligns with the piston bowl for consistent ignition timing. On reinstallation, replace the copper sealing washer and tighten the nozzle holder to the specified torque.