Chevrolet Silverado / GMC Sierra. Manual - part 207
Fig. 694: Locating Spark Plugs
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12. Measure the spark plugs for the proper gap.
Adjust the spark plug gap if necessary.
Specification: Spark plug gap to 1.52 mm (0.060 in).
13. Install the spark plugs.
Tighten: Tighten the spark plugs to 15 N.m (11 lb ft).
VALVE ROCKER ARM AND PUSH ROD INSTALLATION
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 695: View Of Valve Pushrods
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1. Install the valve pushrods.
IMPORTANT: Be sure to keep parts in order. Parts must be reinstalled into
the original location and position.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 696: Locating Arrow On Valve Rocker Arm Support
Courtesy of GENERAL MOTORS CORP.
2. Install the valve rocker arm supports.
IMPORTANT: Be sure that the arrow on the valve rocker arm support is in
the up position.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 697: Pushrod Socket, Roller Pivot & Valve Stem Tip
Courtesy of GENERAL MOTORS CORP.
3. Apply prelube GM P/N 12345501 (Canadian P/N 992704) or equivalent, to the following
valve rocker arm contact surfaces:
Valve pushrod socket (1)
Roller pivot (2)
Valve stem tip (3)
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado