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Fig. 682: Locating Cylinder Head Bolts (Left) 6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the NEW cylinder head bolts. 7. Install the NEW cylinder head bolts finger tight.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 683: Cylinder Head Bolt Tightening Sequence 8. Tighten the cylinder head bolts in sequence on the first pass. Tighten: Tighten the bolts in sequence on the first pass to 30 N.m (22 lb ft). 9. Use the J 45059 in order to tighten the cylinder head bolts in sequence on the final pass. See Special Tools. Tighten: Tighten the long bolts (1, 4, 5, 8, and 9) on the final pass in sequence to 75 degrees. Tighten the medium bolts (12 and 13) on the final pass in sequence to 65 degrees. Tighten the short bolts (2, 3, 6, 7, 10, and 11) on the final pass in sequence to 55 NOTE: Refer to Fastener Notice .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 684: Locating Spark Plug Wire Support 10. Install the spark plug wire support and bolts. Tighten: Tighten the spark plug wire support bolts to 12 N.m (106 lb in).
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 685: View Of Spark Plugs (Left) 11. Measure the spark plugs for the proper gap. Adjust the spark plug gap if necessary. Specification: Spark plug gap to 1.52 mm (0.060 in). 12. Install the spark plugs. Tighten: Tighten the spark plugs to 15 N.m (11 lb ft).
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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