Spark Plug: Service and Repair

Spark Plug Replacement

Removal Procedure





1. Remove the appropriate spark plug wire boot(s) (2) from the spark plug.

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.

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. Inspect the spark plug gap. Adjust the gap as needed. Refer to Engine Mechanical Specifications Specifications.

2. Install the spark plug into the cylinder head by hand.

Caution:
Refer to Fastener Caution Fastener Caution.

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





4. If reinstalling the old spark plug wires, apply dielectric grease GM P/N 12345579 (Canadian P/N 10953481), or equivalent to the inside the spark plug wire boots.

5. Install the appropriate spark plug wire boot(s) (2) to the spark plug.