Spray Pattern Test

The injection nozzles used with this system have several features which make pattern testing difficult, i.e. longer nozzle overlap and greater pintle to body and needle to body clearances than other nozzle types, and an internal wave washer between the nozzle nut and nozzle. Typical injector testers cannot deliver fuel with sufficient velocity to obtain proper spray patterns. Therefore, this type nozzle should not be rejected due to spray pattern.