Nissan 100NX N14 silhouetteN14

Engine Maintenance — Injection Nozzle Check (Cont'd) / Idle Speed Check / Timing Belt Replacement (CD)

MA-57prose procedure

CD diesel engine; idle speed spec given for M/T only.

Continued from MA-56

Injection Nozzle Check (Cont'd)

  1. 5
    Check fuel spray pattern by pumping tester handle quickly (4 or 6 times per second).
    Line drawing comparing injection nozzle spray patterns. The leftmost nozzle is labeled 'Good' with a fine even spray; the three nozzles to the right are labeled 'Wrong' showing irregular, dribbling and uneven spray patterns.
    EF794A
  2. 6
    If injection nozzle is not in normal condition, replace or correct.
    Refer to EF & EC section for injection pressure adjustment.
  3. 7
    Install all injection nozzles and securely connect fuel spill tube and delivery tube.
    Line drawing of the injection nozzle being installed showing the 'Nozzle side' orientation at top and the 'Combustion chamber side' at bottom, with arrows indicating the correct installation direction.
    SEF668A
  4. 8
    Bleed air from fuel system and check for fuel leakage with engine running.

Idle Speed Check

Idle Speed Check

  1. 1
    Warm up engine to normal operating temperature.
  2. 2
    Attach a diesel tacho tester.
  3. 3
    Race engine two or three times and check idle speed.
  4. 4
    If it is out of specification, adjust idle speed with idle speed adjusting screw.
    Securely lock the adjusting screw with lock nut.
    Line drawing of the fuel injection pump showing the 'Idle speed adjusting screw' and the 'Fuel injection pump' with leader lines pointing to each.
    SMA420C

Idle Speed — Unit: rpm

M/T
Idle Speed700 +50/-0

Timing Belt Replacement

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See also

EF & ECENGINE FUEL & EMISSION CONTROL SYSTEM - SECTION EF & ECEMEngine Mechanical - Section EM (Contents)

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