Spark Plug: Service and Repair

Spark Plug Replacement

Removal Procedure

Caution: Observe the following service precautions:

* Allow the engine to cool before removing the spark plugs. Attempting to remove spark plugs from a hot engine can cause the spark plugs to seize. This can damage the cylinder head threads.
* Clean the spark plug recess area before removing the spark plug. Failure to do so can result in engine damage due to dirt or foreign material entering the cylinder head, or in contamination of the cylinder head threads. Contaminated threads may prevent proper seating of the new spark plug.
* Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the vehicle. Installing spark plugs of another type can severely damage the engine.




1. Remove the air cleaner outlet duct, if required. Refer to Air Cleaner Outlet Duct Replacement (Service and Repair).
2. Remove the intake manifold cover, if required. Refer to Intake Manifold Cover Replacement (Service and Repair).
3. Remove the left side spark plug wires from the spark plugs, if required.




4. Remove the right side spark plug wires from the spark plugs, if required.




5. Remove the spark plugs.

Installation Procedure

Caution: It is important to check the gap of all new and reconditioned spark plugs before installation. Pre-set gaps may have changed during handling. Use a round wire feeler gauge to be sure of an accurate check, particularly on used plugs. Installing plugs with the wrong gap can cause poor engine performance and may even damage the engine.




1. Gap the NEW spark plugs. Refer to Ignition System Specifications (Specifications).
Caution: Refer to Fastener Caution (Fastener Caution).

2. Install the spark plugs.

Tighten the plugs to 15 Nm (11 lb ft).




3. Install the right side spark plug wires to the spark plugs, if required.




4. Install the left side spark plug wires to the spark plugs, if required.
5. Install the intake manifold cover, if required. Refer to Intake Manifold Cover Replacement (Service and Repair).
6. Install the air cleaner outlet duct, if required. Refer to Air Cleaner Outlet Duct Replacement (Service and Repair).