Installation Procedure

Courtesy of GENERAL MOTORS CORP.

NOTE: The spark plug comes pre-gapped. Do not change the spark plug gap from 1.01 mm (0.040 in).

Inspect each spark plug gap. Adjust each plug as needed. Refer to Ignition System Specifications .
Hand start the spark plugs in the corresponding cylinders.
CAUTION: Refer to FASTENER CAUTION .
Tighten the spark plugs.
Tighten
- For used head 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 .