GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 G8 🢒 Preface 🢒 Dangers, Warnings, and Cautions 🢒 Spark Plug Replacement

Removal Procedure
  1. Remove the engine cover. Refer to Engine Cover Replacement.
  2. Remove the spark plug wires. Refer to Spark Plug Wire Replacement.

    3. Object Number: 1950749 Size: SH
  3. Loosen each spark plug 1 or 2 turns.
  4. Use a brush, or use compressed air in order to remove any dirt from the spark plugs.
  5. Remove the spark plugs one at a time and place each plug in a tray marked with the corresponding cylinder numbers.

Installation Procedure

    Object Number: 1950749 Size: SH
  1. Inspect each spark plug gap. Adjust each plug as needed.

    2. Specification
    Spark plug gap: 1.524 mm (0.060 in).

  2. Hand start the spark plugs in the corresponding cylinders.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Tighten the spark plugs. Tighten the engine spark plug on a NEW cylinder head to 20 N·m (15 lb ft) and the engine spark plug on subsequent installations to 15 N·m (11 lb ft).
  4. Install the spark plug wires. Refer to Spark Plug Wire Replacement.
  5. Install the engine cover. Refer to Engine Cover Replacement.