Injection Nozzles: Notes

Injection nozzle problems usually are accompanied by knocking in one or more cylinders, engine overheating, loss of power or performance, black exhaust smoke and increased fuel consumption. To locate and correct faulty injectors, proceed as follows:

1. Loosen line unions on each injection nozzle, one at a time with engine running at fast idle. If engine speed remains constant with line removed, that nozzle is defective.
2. To remove nozzle, detach injector line. Use special tool (US 2775) to remove injection nozzles. To disassemble, place upper part in vise and loosen lower part. Then reverse position and carefully remove parts from lower part. Do not interchange parts from one injector to another.
3. To install, insert new heat shield with recess pointing upward. Tighten nozzles to 51 ft. lbs. (69 N.m) and lines to 18 ft. lbs. (24 N.m). Bleeding is not necessary.
   Fig 1: Exploded View of Injection Nozzle

   Courtesy of NOT AVAILABLE