Gas Engine Ignition Spark Plug Replacement

Courtesy of GENERAL MOTORS COMPANY

NOTE: Callouts 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 reusing the spark plugs, inspect for wear or damage. If using NEW spark plugs, do NOT attempt to check the spark plug gap. The plugs come pre-gapped. Tighten 20 N.m (15 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 reusing the spark plugs, inspect for wear or damage.
If using NEW spark plugs, do NOT attempt to check the spark plug gap. The plugs come pre-gapped.
Tighten 20 N.m (15 lb ft)