Chevrolet Silverado / GMC Sierra. Service manual — part 171

The oil pump screen must align parallel with the bottom of the oil pan when the oil
pan is installed.

Fig. 569: View Of Oil Pump Driveshaft & Oil Pump Driveshaft Retainer
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Install a NEW oil pump driveshaft retainer during assembly.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

9. Install the oil pump driveshaft and the NEW oil pump driveshaft retainer.

VALVE ROCKER ARM COVER CLEANING AND INSPECTION

Fig. 570: Valve Rocker Arm Cover
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to SAFETY GLASSES CAUTION .

IMPORTANT: The positive crankcase ventilation (PCV) orifice is part of the

valve cover and cannot be removed. If damaged, replace the
valve cover.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

1. Clean the valve rocker arm cover in cleaning solvent.

2. Dry the valve rocker arm cover with compressed air.

3. Inspect the valve rocker arm cover for the following:

Damage to the PCV orifice (1)

Damage to the bolt holes (2)

A damaged valve rocker arm cover may interfere with the valve rocker arms.

Damage to the exterior of the valve rocker arm cover (3)

Gouges or damage to the sealing surface (4)

Damage to the oil fill tube grommet (5)

Restrictions to the ventilation system passages

OIL PAN CLEANING AND INSPECTION

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 571: View Of Oil Pan Baffle Bolts & Baffle
Courtesy of GENERAL MOTORS CORP.

1. Remove the oil pan baffle bolts and the oil pan baffle.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado