Nissan 100NX N14 silhouetteN14

Injection Nozzle

EF & EC-702prose procedure

CD engine (CD20 diesel) injection nozzle test and adjustment.

Continued from EF & EC-701

Test and Adjustment

Injection Pressure Test

  1. 1
    Install nozzle to injection nozzle tester and bleed air from flare nut.
    Illustration of a nozzle installed on an injection nozzle tester with a pressure gauge; hands shown bleeding air from the flare nut.
    EF791A
  2. 2
    Pump the tester handle slowly (one time per second) and watch the pressure gauge.
    Illustration of the nozzle tester being pumped by hand while watching the pressure gauge; nozzle spraying diesel fuel.
    SEF672A
  3. 3
    Read the pressure gauge when the injection pressure just starts dropping.
    Always check initial injection pressure using a new nozzle.
  4. 4
    To adjust injection pressure, change adjusting shims.
    a. Increasing the thickness of adjusting shims increases initial injection pressure. Decreasing thickness reduces initial pressure.
    b. A shim thickness of 0.04 mm (0.0016 in) corresponds approximately to a difference of 471 kPa (4.71 bar, 4.8 kg/cm2, 68 psi) in initial injection pressure.
    Refer to S.D.S. for adjusting shim.
    Cutaway illustration of the nozzle holder showing the location of the adjusting shim used to change injection pressure.
    SEF673A
Usedinitial injection pressure
12,259 - 13,239kPa122.6 - 132.4bar125 - 135kg/cm21,778 - 1,920psi
Newinitial injection pressure
12,749 - 13,534kPa127.5 - 135.3bar130 - 138kg/cm21,849 - 1,962psi
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See also

S.D.S.

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