Service manual

9. Measure the NEW spark plugs for the proper gap.

Adjust the spark plug gap, if necessary.

Speciﬁcations

Spark plug gap to 1.52 mm (0.060 in).

10. Install the NEW spark plugs.

Tighten

• Tighten the spark plugs for a USED cylinder

head to 15 N·m (11 lb ft).

• Tighten the spark plugs for the initial

installation of a NEW cylinder head to

30 N·m (22 lb ft).

Valve Rocker Arm and Push Rod

Installation

SIE-ID = 194762

Important: Be sure to keep parts in order. Parts must

be put back from where they were removed.

1. Apply prelube GM P/N United States 12345501,

GM P/N Canada 942704, or equivalent, to the

valve rocker arm and the valve rocker arm

ball bearing surfaces.

Important: Be sure that the valve pushrods seat in

the valve lifter sockets.

2. Install the valve pushrods.

3. Install the following parts:

3.1. The valve rocker arm nuts (1)

3.2. The valve rocker arm balls (2)

3.3. The valve rocker arms (3)

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6-128 Engine Mechanical - 5.0L and 5.7L Engine

2002 - Unit Repair (May 25, 2001)