Technician A says that some service facilities do test and repair the hydraulic nozzles used inside injectors because cleaning and rebuilding a nozzle in house is often more economical than replacing it. Technician B says when a problem with an injector is identified by the heavy-duty onboard diagnostics (HD-OBD) system or by using cylinder cutout and contribution testing, injectors are simply replaced with new or rebuilt parts. Who is right?

Question

Quizplus · Accepted Answer

Both technicians are correct. Technician A is right that some service facilities test and repair hydraulic nozzles because it can be more economical. Technician B is also correct that injectors are often replaced when identified as faulty by diagnostic systems.

Technician a Says That Some Service Facilities Do Test and Repair