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Fig. 92: Loosening Camshaft Sprocket Bolt 36. Before performing one of the top dead center (TDC) procedures, break loose both the exhaust and intake camshaft sprocket bolts. Use a 25 mm (1 in) open end wrench on the 37. Perform one of the following methods for the service timing procedure.
2007 Hummer H3 2007 ENGINE Engine Mechanical - 3.7L - H3
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