Installation Procedure

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

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.

Fig 1: View Of Spark Plug And Sparkplug Seat
Courtesy of GENERAL MOTORS CORP.
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).