Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Fig 1: View Of Spark Plug And Sparkplug Seat

Courtesy of GENERAL MOTORS CORP.

Ensure that the spark plug washer is positioned correctly.
Inspect the spark plug gap. Adjust the gap as needed.
Specification: Spark plug gap: 1.524 mm (0.060 in)

NOTE: Refer to Fastener Notice in Cautions and Notices.
Hand start the spark plug into the corresponding cylinder.
Tighten the spark plug.
Tighten:
- For used heads, tighten the plug to 15 N.m (11 lb ft).
- For new aluminum heads, tighten the plug to 20 N.m (15 lb ft).
- For new iron heads, tighten the plug to 30 N.m (22 lb ft).