Spark Plug: Service and Repair

Spark Plug Replacement

Tools Required

J 41131 Engine Tilt Strap

Removal Procedure

Notice: 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 intake manifold cover.
2. Remove the spark plug wire(s) (2, 4, and 6) from the left side spark plug(s).




3. Rotate the engine for access to the rear of the engine. Refer to Rotating the Engine for Service Access.
4. Remove the spark plug wire(s) (1, 3, and/or 5) from the right side spark plug(s).




5. Remove the spark plug(s) from the cylinder head.

Installation Procedure






Notice: 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 spark plugs to specifications. Refer to Ignition System Specifications.

Notice: Be sure plug threads smoothly into cylinder head and is fully seated. Use a thread chaser if necessary to clean threads in cylinder head. Cross-threading or failing to fully seat spark plug can cause overheating of plug, exhaust blow-by, or thread damage. Follow the recommended torque specifications carefully. Over or under-tightening can also cause severe damage to engine or spark plug.

2. Install the spark plug(s) to the cylinder head.

Tighten the plugs to 15 N.m (11 lb ft).




3. Install the spark plug wire(s) (1, 3, and 5) to the right side spark plug(s).
4. Release the tension on the J 41131.
5. Remove the J 41131.
6. Install the engine mount struts.




7. Install the spark plug wire(s) (2, 4, and/or 6) from the left side spark plug(s).
8. Install the intake manifold cover.