QX4 2WD V6-3.5L (VQ35DE) (2003)
Spark Plug: Service and Repair
Changing Spark Plugs
1. Remove engine cover.
2. Remove throttle wires.
3. Remove air duct with air cleaner assembly.
4. Disconnect harness connectors and harness brackets around ignition coil sides.
5. Remove throttle body. (Only when removing the No. 4 cylinder spark plug)
6. Disconnect ignition coil harness connectors.
7. Loosen ignition coil fixing bolts and pull out coil from intake manifold connector.
Ignition coil: 8.5 -10.7 Nm (0.86 - 1.1 kg-m, 75 - 95 inch lbs.)
8. Check type and gap of new spark plug.
Spark plug type (Platinum-tipped type)
Gap (Nominal): ............................................................................................................................................................................ 1.1 mm (0.043 inch)
Spark plug: 20 - 29 Nm (2.0 - 3.0 kg-m, 14 - 22 ft. lbs.)
Use standard type spark plug for normal condition.
The hot type spark plug is suitable when fouling may occur with the standard type spark plug such as:
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frequent engine starts