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Fig. 146: Cylinder Head Bolt Tightening Sequence 8. Tighten the cylinder head bolts. Tighten: 1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb ft). 2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using J 45059 . 3. Tighten the M11 cylinder head bolts (1-10 ) a final pass to 70 degrees in sequence using J 45059 . 4. Tighten the M8 cylinder head bolts (11-15) to 30 N.m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts. NOTE: Refer to Fastener Notice .
2008 Hummer H3 2008 ENGINE Engine Mechanical - 5.3L - H3
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