Gas Engine Ignition Spark Plug Replacement

Courtesy of GENERAL MOTORS COMPANY

NOTE: Callouts items in the following chart represent components shown in graphic above.

Callout	Component Name
CAUTION: This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage. Preliminary Procedure Ignition Coil Replacement
1	Spark Plug [4x] CAUTION: Refer to Component Fastener Tightening Caution . Procedure If reinstalling the spark plugs, inspect for wear or damage. Gas Engine Ignition Spark Plug Replacement If installing NEW spark plugs, do NOT attempt to check the spark plug gap. The plugs come pre-gapped. Tighten 17 N.m (13 lb ft)

Callout

Component Name

CAUTION:

This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.

Preliminary Procedure Ignition Coil Replacement

Spark Plug [4x]

CAUTION:

Refer to Component Fastener Tightening Caution .

Procedure

If reinstalling the spark plugs, inspect for wear or damage. Gas Engine Ignition Spark Plug Replacement
If installing NEW spark plugs, do NOT attempt to check the spark plug gap. The plugs come pre-gapped.

Tighten
17 N.m (13 lb ft)