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Cylinder Head: Installation

  1. Clean cylinder head and cylinder block gasket surfaces. Clean cylinder head bolt thread and bolt holes. Apply Sealant (1052080) to head bolt threads and underside of bolt heads. DO NOT  apply sealant to head gasket surface. Install rear head bolt in left cylinder head. Install cylinder head.
    CAUTION: Install push rods with hardened end (indicated by paint stripe) upward to prevent damaging engine. To prevent valve and piston contact during rocker arm shaft installation, rotate crankshaft until positioned as noted in step 3) before tightening rocker arm shaft bolts.
  2. Install the retaining head bolts and tighten them in proper sequence according to the specification. Go to Fig. Fig 1. See TORQUE SPECIFICATIONS . Install push rods in original location with hardened end upward.
  3. Rotate crankshaft until timing mark on crankshaft damper aligns with "0" mark on timing tab, then rotate crankshaft counterclockwise 3 1/2" (estimate this distance by aligning crankshaft damper mark with first lower water pump bolt). See Figure.
  4. Install rocker arm shafts, ensuring push rods are seated in rocker arms. Alternately tighten shaft bolts to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.
Fig 1: Cylinder Head Bolt Tightening Sequence
G95I27068Courtesy of GENERAL MOTORS CORP.