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1. Remove the seals (308) from the pipe and covers. Fig. 510: View Of Coolant Air Bleed Pipe Components 2. Clean the pipe and covers in solvent. again. Upon installation of the pipe and covers, install NEW CAUTION: Refer to Safety Glasses and Compressed Air Caution .
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
3. Dry the pipe and covers with compressed air. 4. Inspect the pipe and covers for restrictions within the pipe (1) or damaged sealing surfaces (2, 3). WATER PUMP CLEANING AND INSPECTION Fig. 511: View Of Water Pump 1. Remove the old gasket from the water pump sealing surfaces. Refer to Replacing Engine Gaskets. 2. Clean all excess dirt and debris from the water pump housing. 3. Inspect the water pump for the following conditions: Gasket and hose sealing surfaces for excessive scratches or gouging Restrictions within the internal coolant passages Excessive side-to-side play in the pulley shaft Leakage at the water inlet housing or rear cover
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Leakage at the water pump vent hole A stain around the vent hole is acceptable. If leakage, dripping, occurs with the engine Wear or damage in the belt tracking area of the pulley THREAD REPAIR Tools Required J 42385-100 Head/Main Bolt Thread Repair Kit. See Special Tools. J 42385-200 Common Thread Repair Kit. See Special Tools. J 42385-300 Fixtures and Hardware Kit. See Special Tools. General Thread Repair
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 512: View Of Bushing Type Insert & Base Material The thread repair process involves a solid, thin walled, self-locking, carbon steel, bushing type
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
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