Installation Procedure
- Measure the spark plug gap on the spark plugs to be installed. Compare the measurement to the gap specifications. Refer to Ignition System Specifications . Correct as necessary.
- Install the spark plugs into the engine.
- Use this reinstallation torque specification when installing NEW or USED spark plugs into a cylinder head that has gone through a normal engine thermal cycle.
Tighten: Tighten the spark plug to 15 N.m (11 lb ft).
- Use this initial installation torque specification ONLY when installing spark plugs into a NEW cylinder head that has NOT gone through a normal engine thermal cycle.
Tighten: Tighten the spark plug to 27 N.m (20 lb ft).
- Use this reinstallation torque specification when installing NEW or USED spark plugs into a cylinder head that has gone through a normal engine thermal cycle.
- Connect the spark plug wires to the spark plugs.
- Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L36) in Engine Mechanical.
IMPORTANT:
Always use the reinstallation torque specification when installing NEW or USED spark plugs into a USED cylinder head. Use the initial installation torque specification ONLY when installing spark plugs into a NEW cylinder head that has NOT gone through a normal engine thermal cycle.