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Installation Procedure

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Hydraulic Element Lash Adjusters
    GM412185Courtesy of GENERAL MOTORS CORP.
  1. Install the hydraulic element lash adjusters into their bores in the cylinder head. Install the camshaft caps and hand start the camshaft cap bolts.
  2. Install the camshaft caps.
    3. CAUTION: Refer to Fastener Caution .
  3. Tighten the camshaft cap bolts in increments of 3 turns until they are seated. Tighten the camshaft caps to 10 N.m (89 lb in).
    4. NOTE:
    • It is critical during installation to ensure the bearing rear cap and cylinder head alignment is correct and the mating surfaces are flush.
      • Ensure that all sealing material has been removed from the components, and the sealing surfaces are clean and free of contamination prior to applying the sealer.
      • Install and align the rear cap within 20 minutes of applying the sealer.
    • Apply the sealer to all locations centrally locating the bead on the rail.
  4. Apply a 3.5 mm bead of sealer to the cylinder head at the number 6 intake camshaft rear cap mating surface. Refer to Adhesives, Fluids, Lubricants, and Sealers  for the recommended sealant.
  5. Install the number 6 intake camshaft rear cap.
    1. Tighten the cap bolts evenly to 5 N.m (44 lb in).
    2. Tighten the cap bolts evenly a final pass to 10 N.m (89 lb in).
    6. Fig 2: Sealer Application Areas
    GM1825078Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • It is critical during installation to ensure the bearing rear cap and cylinder head alignment is correct and the mating surfaces are flush.
      • Ensure that all sealing material has been removed from the components, and the sealing surfaces are clean and free of contamination prior to applying the sealer.
      • Install and align the rear cap within 20 minutes of applying the sealer.
    • Apply the sealer to all locations centrally locating the bead on the rail.
      • Run bead to 5.0 mm, dimension a, as shown.
      • Where the cap ends on the perimeter rail, extend bead approximately 4.0 mm beyond edge of cap.
      • Run bead, dimension c, 32 mm from the edge of the cylinder head as shown.
      • Run beads, dimension b, 20 mm from edge of cylinder head as shown.
  6. Apply a 2.5 mm bead of sealer to the cylinder head at the number 6 intake camshaft rear cap mating surface. Refer to Adhesives, Fluids, Lubricants, and Sealers .
  7. Install the number 6 intake camshaft rear cap.
    1. Tighten the cap bolts evenly to 5 N.m (44 lb in).
    2. Tighten the cap bolts evenly to 10 N.m (89 lb in).
    3. Back the cap bolts out 120 degrees.
    4. Tighten the cap bolts evenly a final pass to 10 N.m (89 lb in).
    8. Fig 3: Identifying Fuel Pump Roller Lifter Orifice
    GM2244396Courtesy of GENERAL MOTORS CORP.
  8. Remove all excess sealing material from the fuel pump roller lifter orifice (1), and ensure the orifice is free of debris.
  9. Remove all excess sealing material from the sealing surfaces.
    10. Fig 4: Cylinder Head Opening Plate
    GM1825079Courtesy of GENERAL MOTORS CORP.
  10. Install the rear cylinder head opening plate and bolts and tighten to 10 N.m (89 lb in).
  11. Install the camshaft position intake actuator. Refer to Camshaft Position Intake Actuator Replacement .
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