Removal Procedure
- Remove the engine cover, if required. Refer to
Engine Cover Replacement.
- If required, remove the appropriate left side spark plug wire boot(s) (2) from the spark plug(s).
| 2.1. | Twist the spark plug boot 1/2 turn. |
| 2.2. | 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. |
- If required, remove the appropriate right side spark plug wire boot(s) (1) from the spark plug(s).
| 3.1. | Twist the spark plug boot 1/2 turn. |
| 3.2. | 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. |
- If required, loosen the appropriate left side spark plug 1 or 2 turns.
- Brush or air blast away any dirt from around the spark plug.
- Remove the appropriate left side spark plug (1). If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
- If required, loosen the appropriate right side spark plug 1 or 2 turns.
- Brush or air blast away any dirt from around the spark plug.
- Remove the appropriate right side spark plug (1). If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
Installation Procedure
- Ensure that the spark plug washer is positioned correctly.
- Inspect the spark plug gap. Adjust the gap as needed. Refer to
Engine Mechanical Specifications.
- Install the appropriate right side spark plug (1) into the cylinder head by hand.
Caution: Refer to Fastener Caution in the Preface section.
- Tighten the spark plug to
15 N·m (11 lb ft).
- Install the appropriate left side spark plug (1) into the cylinder head by hand.
- Tighten the spark plug to
15 N·m (11 lb ft).
Caution: If the boot to wire movement has occurred, the boot will give a false visual impression of being fully seated. Ensure that the boots have been properly assembled by pushing sideways on the installed
boots. Failure to properly seat the terminal onto the spark plug will lead to wire core erosion and result in an engine misfire or crossfire condition, and possible internal damage to the engine.
- If reinstalling the old spark plug wires, apply dielectric grease GM PN 12345579 (Canadian PN 10953481), or equivalent to the inside of the spark plug wire boots.
- Install the appropriate right side spark plug wire boot(s) (1) to the spark plug(s).
- Install the appropriate left side spark plug wire boot(s) (2) to the spark plug(s).
- Install the engine cover, if required. Refer to
Engine Cover Replacement.
