Injection Nozzles: Notes

Problems with injection nozzles usually are accompanied by knocking in 1 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. Remove vacuum pump and plunger. 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 after cleaning connection. Plug all openings to keep dirt out of fuel system.
3. To disassemble, place upper section in vise and loosen lower section, then reverse position and carefully remove parts from lower section. Do not interchange parts from 1 injector to another.
4. Clean all parts in diesel oil. Install new heat shields with recess in shield pointing upward. On Peugeot, use new copper gaskets. Tighten nozzles to specified torque.
   Fig 1: Disassembled View of Injector Nozzle

   Courtesy of PEUGEOT MOTORS OF AMERICA, INC.