Fuel Injection Nozzle Test (DE-04.06)

Fuel Injection Nozzle Test (DE-04.06)

Test Data:

Tightening Torque:

Special Tools:

Warning:
Use only clean testing oil or filtered diesel fuel for testing. When testing a nozzle, never move hand into jet of nozzle. Fuel jet will deeply penetrate the flesh and will destroy the tissue. Fuel entering into blood may cause blood poisoning.

Caution:
The shutoff valve for the pressure gauge should remain closed during spray pattern and buzzing tests. Otherwise, the pressure gauge may be damaged due to excessive and rapid pressure fluctuations.








Notes:
Verify the complaint with the customer. If slight or occasional knock has been reported, or knocking occurs during cold start only, experience has shown that the use of a different brand of diesel fuel will often cure the problem. Please keep in mind that knocking of a cold diesel engine is not a sign of malfunction and not harmful to the engine. Perform all verification tests with the engine at operating temperature.

If the knocking problem still persists after operating the vehicle on one or more tanks of different fuel, the nozzle assemblies must be removed.

Perform all the following tests consecutively and note test results before cleaning or replacing injection nozzle parts.


Test