Injection Nozzles

Bosch injection nozzles are used for all models. All nozzles are similar in appearance. Different part numbers and injection pressures for each application must be verified before servicing.

A pressurized mist of fuel is injected into a round swirl chamber. Fuel swirls around the chamber, mixing with hot air that is compressed to a ratio of 23:1. Heat shields protect each injector.

Combustion begins in the rich swirl chamber, continues on through a small passageway, and then into a leaner main chamber. As peak cylinder pressures build in swirl chamber, rather than main chamber, loads on connecting rods and crankshaft are reduced.