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Fig. 506: 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 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
in) area is warped and should be replaced. EXHAUST MANIFOLD CLEANING AND INSPECTION Fig. 507: Exhaust Manifold IMPORTANT: Do not use the exhaust manifold-to-cylinder head gaskets again. Upon installation of the exhaust manifold, install a
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
1. Clean the exhaust manifold (600) and heat shield (603) in solvent. 2. Dry the exhaust manifold with compressed air. 3. Inspect the exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging. 4. Inspect for a loose, damaged, or cracked heat shield (603). 5. Inspect the studs (605) for damaged threads. Fig. 508: Measuring Exhaust Manifold To Cylinder Head Surface For Warpage 6. Use a straight edge and a feeler gage and measure the exhaust manifold cylinder head deck for warpage. CAUTION: Refer to Safety Glasses Caution .
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
An exhaust manifold deck with warpage in excess of 0.25 mm (0.01 in) within the 2 front or ENGINE COOLANT AIR BLEED PIPE AND HOLE COVER CLEANING AND INSPECTION Fig. 509: View Of Coolant Air Bleed Pipe Seal IMPORTANT: Do not use the engine coolant air bleed pipe and cover seals
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
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