Spark Plug: Service and Repair

Spark Plug Replacement

Removal Procedure





1. Remove the appropriate spark plug wire boot(s) (2) from the spark plug. (left side shown, right similar).

1. Twist the spark plug boot 1/2 turn.
2. Pull ONLY on the spark plug boot or use a tool designed for this purpose in order to remove the spark plug wire boot from the spark plug.





2. Loosen the spark plug 1 or 2 turns. (left side shown, right similar).
3. Brush or air blast away any dirt from around the spark plug.
4. Remove the spark plug. If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.



Installation Procedure





1. Ensure that the spark plug washer is positioned correctly.
2. Inspect the spark plug gap. Adjust the gap as needed. Refer to Engine Mechanical Specifications (Specifications) .
3. Install the spark plug into the cylinder head by hand. (left side shown, right similar).
Caution: Refer to Fastener Caution (Fastener Caution) .
4. Tighten the spark plug.

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





5. If reinstalling the old spark plug wires, apply dielectric grease GM PN 12345579 (Canadian PN 10953481), or equivalent to the inside the spark plug wire boots.
6. Install the appropriate spark plug wire boot(s) (2) to the spark plug. (left side shown, right similar).