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Fig. 128: Removing/Installing Intake Manifold Bolts 2. Remove the manifold absolute pressure (MAP) sensor (714). Refer to Intake Manifold Removal (RPO LY2/LY6/L92) or Intake Manifold Removal (RPO
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
3. Remove the evaporative emission (EVAP) canister purge solenoid valve, EVAP tubes, and fuel rail with injectors. Refer to Fuel Rail and Injectors Removal . 4. Remove the throttle body and gasket. Refer to Throttle Body Removal . 5. Clean the intake manifold (500) in solvent. 6. Dry the intake manifold with compressed air. Inspection Procedure 1. Inspect the manifold for the following conditions: Damaged gasket or sealing surfaces Loose threaded inserts or studs Debris or restrictions within the passages of the manifold Damaged or broken vacuum fittings Inspect the composite intake manifold assembly for cracks or other damage. CAUTION: Refer to Safety Glasses and Compressed Air Caution .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 129: Inspecting Intake Manifold Cylinder Head Deck For Warpage 2. Inspect the intake manifold cylinder head deck for warpage. 1. Locate a straight edge across the intake manifold cylinder head deck surface. Position the straight edge across a minimum of two runner port openings. 2. Insert a feeler gage between the intake manifold and the straight edge. An intake manifold with warpage in excess of 3 mm (0.118 in) over a 200 mm (7.87
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
in) area is warped and should be replaced. EXHAUST MANIFOLD CLEANING AND INSPECTION Fig. 130: Exhaust Manifold IMPORTANT: Do not use the exhaust manifold-to-cylinder head gaskets again. Upon installation of the exhaust manifold, install a
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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