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Fig. 469: Inspecting Areas Of Valve Lifters 1. Clean the components in cleaning solvent. IMPORTANT: Components that are to be used again must be marked, sorted or organized for assembly. CAUTION: Refer to Safety Glasses and Compressed Air Caution .
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
2. Dry the components with compressed air. 3. Inspect the valve lifters for the following conditions: Bent or broken clip (1) Worn pushrod socket (2) Scuffed or worn sides (3) If the valve lifter shows wear, inspect the engine block lifter bores for wear or Flat spots on the roller (4) Loose or damaged pin (5) Plugged oil hole (6) Worn or damaged roller bearing The roller should rotate freely with no binding or roughness. Valve Guides Inspect the valve lifter guides for the following conditions: Cracks or damage Excessive wear in the lifter mounting bores CYLINDER HEAD DISASSEMBLE Tools Required J 8062 Valve Spring Compressor - Head Off. See Special Tools.
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 470: Compressing Valve Spring Using IMPORTANT: With the components at room temperature, remove the Mark, organize, or sort the cylinder head components for
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
1. Remove the spark plugs from the cylinder heads. 2. Use the J 8062 in order to compress the valve spring. See Special Tools. Fig. 471: Valve Stem Keys, Valve Spring Cap & Valve Spring assembly. Return the components to their original
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
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