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Revised cylinder head installation procedure for 1997-2002 GM 5.7L VIN G engines

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Engine Builders: The AERA Technical Committee offers the following information on a revised cylinder head installation procedure for 1997-2002 GM 5.7L VIN G engines, Figure 1. This revised procedure should be used any time the cylinder heads are being installed and supersedes information found in earlier published service manuals. Previously published technical bulletin TB 1624 should be discarded because the information contained here is the most current.

Previously, it was acceptable to reuse the 8 mm head bolts. It is now recommended that all cylinder head bolts be replaced at the time of cylinder head installation. New 11 mm bolts come with a pre-applied sealer and lubricant and no other sealant should be used on them.

  1. Tighten new 11 mm bolts (1-10) in sequence to 22 ft.lbs. (30 Nm).
  2. Rotate those bolts (1-10) in sequence an additional 90

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