Installation Procedure

Fig 1: Removing/Installing Spark Plugs

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Use one of the following types of iridium tipped spark plugs.

IMPORTANT:

Do not touch the tip of the spark plug.
Do not damage the iridium surface of the electrode when gapping the plug.
Do not adjust the gap on used spark plugs. Replace the spark plug if the gap is greater than specification.

Set the spark plug gap. Bend only the side electrode.
New Spark Plug Gap: 1.0-1.1 mm (0.040-0.043 in)

Maximum Used Spark Plug Gap: 1.2 mm (0.047 in)

NOTE: Refer to Fastener Notice .

Install the spark plugs to the cylinder head.
Tighten: Tighten the spark plugs to 18 N.m (13 lb ft).

Fig 2: Electrical Harness Package, Ignition Coils And Fasteners

Courtesy of GENERAL MOTORS CORP.

Install each ignition coil (3) to the cylinder head cover.
Secure the ignition coils using the bolts (4).
Tighten: Tighten the bolts to 9 N.m (80 lb in).
Connect each ignition coil electrical connector.

Fig 3: View Of Engine Top Cover, Plastic Retainers And Fasteners

Courtesy of GENERAL MOTORS CORP.

Install the engine cover (1) to the cylinder head cover. Secure the engine cover with the 2 clips and the 2 nuts.
Tighten: Tighten the nuts to 9 N.m (80 lb in).