GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 8062 (KM-348) Valve Spring Compressor - Head Off
    • KM-653-A Adapter

    Object Number: 1289671  Size: SH
  1. Install new 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. Caution: Refer to Fastener Caution in the Preface section.

  20. Tighten the camshaft cap bolts gradually and in the sequence shown for each camshaft cap to 16 N·m (12 lb ft).

  21. Object Number: 1291225  Size: SH
  22. Install the spark plugs and tighten to 25 N·m (18 lb ft).
  23. Install the exhaust gas recirculation (EGR) valve adapter gasket.
  24. Install the EGR valve adapter.
  25. Install the EGR valve adapter bolts and tighten to 25 N·m (18 lb ft).
  26. Install the direct ignition system (DIS) coil mounting bracket.
  27. Install the DIS coil mounting bracket bolts and tighten to 10 N·m (89 lb in).
  28. Install the DIS coil with the ignition wires attached.
  29. Install the DIS coil mounting bolts and tighten to 10 N·m (89 lb in).

  30. Object Number: 1291157  Size: SH
  31. Install the intake manifold studs.
  32. Install the intake manifold.
  33. Install the intake manifold retaining nuts and retaining bolts in the sequence shown and tighten to 25 N·m (18 lb ft).

  34. Object Number: 1289655  Size: SH
  35. Install the fuel rail assembly with the bolts and tighten to 25 N·m (18 lb ft).
  36. Install the thermostat housing assembly.
  37. Install the thermostat housing mounting bolts and tighten to 20 N·m (15 lb ft).

  38. Object Number: 1291215  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 and tighten to 25 N·m (18 lb ft).
  43. Install the exhaust manifold heat shield.
  44. Install the exhaust manifold heat shield bolts and tighten to 15 N·m (11 lb ft).

  45. Object Number: 1289672  Size: SH
  46. Install the coolant temperature sensor and tighten to 20 N·m (15 lb ft).
  47. Install the cylinder head with the intake manifold and the exhaust manifold attached. Refer to Cylinder Head Replacement.