Installation Procedure

Fig 1: View Of Spark Plug And Spark Plug Seat

Courtesy of GENERAL MOTORS COMPANY

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 and adjust as needed. Refer to Ignition System Specifications .
Hand start the spark plugs in the corresponding cylinders.

CAUTION:

Tighten the spark plugs.
- For cylinder head-new: Tighten the spark plugs to 20 N.m (15 lb ft).
- For cylinder head-all subsequent installations: Tighten the spark plugs to 15 N.m (11 lb ft).
Install the spark plug wires. Refer to Spark Plug Wire Replacement .
Install the Intake manifold front cover. Refer to Intake Manifold Cover Replacement - Front .