GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 8062 Valve Spring Compressor - Head Off
    • KM-653-A Adaptor

    Object Number: 1263760  Size: SH
  1. Install the valve stem seals.
  2. Lubricate the valve stems with engine oil.
  3. Carefully install the valves in their original positions. Do not damage the valve stem seals.
  4. Install the valve springs in their original positions.
  5. Install the valve spring caps.

  6. Object Number: 1289657  Size: SH
  7. Compress the valve springs with J 8062 and KM-653-A
  8. Install the valve keys.
  9. Remove J 8062 and KM-653-A .

  10. Object Number: 1289656  Size: SH
  11. Lubricate the valve tappet adjusters with engine oil.
  12. Install the valve tappet adjusters.

  13. Object Number: 1291253  Size: SH
  14. Install the intake camshaft.
  15. Install the intake camshaft caps in their original positions.
  16. Install the exhaust camshaft.
  17. Install the exhaust camshaft caps in their original positions.
  18. Install the camshaft cap bolts.
  19. Notice: Refer to Fastener Notice in the Preface section.

  20. Tighten the camshaft cap bolts gradually and in the sequence shown for each camshaft cap.
  21. Tighten
    Tighten the camshaft cap bolts to 16 N·m (142 lb in).


    Object Number: 1263765  Size: SH
  22. Install the spark plugs
  23. Tighten
    Tighten the spark plugs to 25 N·m (18 lb ft).

  24. Install the ignition coil and EGR mounting bracket and bolts.
  25. Tighten

        • Tighten the left lower side to 20 N·m (15 lb ft).
        • Tighten the other bolts to 30 N·m (22 lb ft).
  26. Install the ignition coil and EGR.
  27. Tighten

        • Tighten the ignition coil mounting bolts to 10 N·m (89 lb in).
        • Tighten the EGR valve bolts to 20 N·m (15 lb ft).

    Object Number: 1263746  Size: SH
  28. Install the intake manifold studs.
  29. Install the intake manifold gasket.
  30. Install the intake manifold.
  31. Install the intake manifold retaining nuts and retaining bolts in the sequence shown.
  32. Tighten
    Tighten the intake manifold retaining nuts and retaining bolts to 25 N·m (18 lb ft).


    Object Number: 1263743  Size: SH
  33. Install the fuel rail assembly with the bolts. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  34. Install the thermostat housing assembly.
  35. Install the thermostat housing mounting bolts.
  36. Tighten
    Tighten the thermostat housing mounting bolts 20 N·m (15 lb ft).

  37. Install the coolant bypass housing and mounting bolts.
  38. Tighten
    Tighten the coolant bypass housing bolts to 15 N·m (97 lb in).


    Object Number: 1263745  Size: SH
  39. Install the exhaust manifold studs.
  40. Install the exhaust manifold gasket.
  41. Install the exhaust manifold.
  42. Install the exhaust manifold retaining nuts in the sequence shown. Tighten the exhaust manifold nuts in the following order: 9, 10, 6, 5, 8, 7, 2, 1, 3, 4
  43. Tighten

        • Tighten the first pass to 25 N·m (18 lb ft).
        • Tighten the second pass to 25 N·m (18 lb ft).
        • Tighten the third pass to 25 N·m (18 lb ft).
        • Tighten the fourth pass to 25 N·m (18 lb ft).
        • Tighten the final pass nuts to 9, 10, 6 to 10 N·m (18 lb ft). In that order.
  44. Install the exhaust manifold heat shield.
  45. Install the exhaust manifold heat shield bolts.
  46. Tighten
    Tighten the exhaust manifold heat shield bolts to 13 N·m (115 lb in).

  47. Install the cylinder head with the intake manifold and the exhaust manifold attached. Refer to Cylinder Head Replacement .