Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Safari and 2004 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

Properly position each spark plug washer.
Inspect each spark plug gap. Adjust each plug 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 plugs in the corresponding cylinders.

Fig 1: View Of Spark Plug And Sparkplug Seat
Courtesy of GENERAL MOTORS CORP.
Tighten the spark plugs.
Tighten:
- For used heads tighten the spark plugs to 15 N.m (11 lb ft).
- For new aluminum heads tighten the spark plugs to 20 N.m (15 lb ft).
- For new iron heads tighten the spark plugs to 30 N.m (22 lb ft).
Install the spark plug wires. Refer to Spark Plug Wire Replacement .