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Clean the following components: Remove all sludge, dirt, or debris using a cleaning solvent or thermal type oven. Refer to Gasket surfaces Refer to Replacing Engine Gaskets. Coolant passages Oil galleries Main bearing caps Cylinder head bolt holes to remove threadlocking material Thread repair tool J 42385-107 may be used to clean the threads of any residual Inspection Procedure 1. Inspect the following components: Cylinder walls for excessive scratches, gouging, or ring ridge Cylinder bores for excessive ring ridge at the top of the cylinder Coolant jacket for cracks Valve lifter bores for excessive scoring or wear Crankshaft bearing webs for cracks Gasket sealing surfaces for excessive scratches or gouging Refer to Replacing Engine Gaskets. Oil galleries for restrictions Threaded bolt holes for damaged threads Cylinder bores for excessive ring ridge at the top of the cylinder 2. Measure the cylinder bores for an oversize condition: Measuring the Cylinder for Oversize IMPORTANT: When cleaning the engine block in a thermal type oven, do not exceed 232°C (450°F).
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
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