Nissan 100NX N14 silhouetteN14

Changing Spark Plugs (Platinum-tipped type for SR20DET engine) / Checking Ignition Wires

MA-35prose procedure

Spark plug procedure shown is the platinum-tipped type for SR20DET engine.

ENGINE MAINTENANCE

Changing Spark Plugs (Platinum-tipped type for SR20DET engine)

  1. 1
    Disconnect ignition wires from spark plugs at boot. Do not pull on the wire.
    Comparison of spark plug electrode condition showing 'O.K.' and 'N.G.' examples, disconnecting ignition wires from spark plugs at the boot.
    SMA273C
  2. 2
    Remove spark plugs with spark plug wrench.
    Spark plug: Standard type PFR7B-9; Hot type PFR6B-9; Cold type PFR8B-9
    Checking and adjusting plug gap are not required between renewals.
    Do not use a wire brush for cleaning.
    If plug tip is covered with carbon, spark plug cleaner may be used. Cleaner air pressure: Less than 588 kPa (5.9 bar, 6 kg/cm², 85 psi). Cleaning time: Less than 20 seconds
    Spark plug wrench (16 mm, 0.63 in) with a magnet to hold the spark plug. Callouts 'Wrench with a magnet to hold spark plug', '16 mm (0.63 in)'.
    SEM294A
  3. 3
    Install spark plugs. Reconnect ignition wires according to nos. indicated on them.
    Spark plug: 20 - 29 N·m (2.0 - 3.0 kg-m, 14 - 22 ft-lb)
    Platinum-tipped spark plug with a hand and wire brush marked with a large X (do not use a wire brush for cleaning). Callout '5 lines' pointing to the plug.
    SMA673B

Checking Ignition Wires

  1. 1
    Inspect wires for cracks, damage, burned terminals and for improper fit.
  2. 2
    Measure the resistance of wires and check for intermittent breaks. If the resistance exceeds the above specification, replace the ignition wire with a new one.
    Resistance: 13.6 - 18.4 kΩ/m (4.15 - 5.61 kΩ/ft)
    Measuring ignition wire resistance with an ohmmeter connected across an ignition wire/distributor cap assembly.
    SMA015A
Support our work!

Search Manual

Search pages, specs, and procedures