Unpack the new nozzle being careful to keep the needle inside the nozzle (match fit).
Wash the nozzle and needle in a light oil solution and ensure the needle moves freely within the nozzle.
Fit the new nozzle ensuring to align the relevant
holes with the locating dowels (where fitted).
There will be a gap between the nozzle face and body, this is normal as there is spring tension against the nozzle needle, refit the nozzle cap nut. Torque values depends on application and can be obtained
from this site, however a typicle torque value for a screw in type injector is around 90Nm.
The Injector can now be ‘pop’ tested at your local DFI workshop and the pressures set to manufacturer’s specification. They normally make a nominal
charge of a few pounds for this service.
Alternatively you may decide to refit the Injector (pressure will not deviate far from the original setting). The choice is entirely yours.
Refit Injector but prior to removing protective cap, clean around
the high pressure Injector pipe nut and olive, Crank engine until fuel is injected from all of the pipes thus ensuring we have complete cleanliness when reconnecting the high pressure pipe to the Injector.
to Injectors where a pressure adjusting screw is used, rather than the more commonly used pressure adjusting shim.