GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.

  1. Disconnect the negative battery cable.
  2. Remove the engine assembly. Refer to Engine Replacement .
  3. Remove the timing belt. Refer to Timing Belt Replacement .
  4. Remove the cylinder head with the intake manifold, the exhaust manifold, and distributor/adaptor attached. Refer to Cylinder Head Replacement .
  5. Remove the power steering/air conditioning belt.

  6. Object Number: 1222970  Size: SH
  7. Remove the power steering pump bracket with the bracket bolt/nut and adjusting bolt (1).

  8. Object Number: 1222968  Size: SH
  9. Remove the air conditioning (A/C) compressor/power steering pump and the bracket with the bolts (2).
  10. Remove the engine mount bracket.

  11. Object Number: 1230300  Size: SH
  12. Remove the generator belt (2).
  13. Remove the generator with the bolts and the nut (3).

  14. Object Number: 1230302  Size: SH
  15. Remove the upper engine mount bracket and the generator shackle with the bolts (5).
  16. Remove the lower engine mount bracket and the generator with the bolts (4).

  17. Object Number: 1240822  Size: SH
  18. Remove the oil pan bolts (3) and nuts (1).

  19. Object Number: 1240795  Size: SH
  20. Remove the oil pump pickup tube bolts.
  21. Remove the connecting rod cap and the bearing. Refer to Piston, Connecting Rod, and Bearing Cleaning and Inspection .
  22. Remove the piston.

  23. Object Number: 1225561  Size: MH
  24. Use a piston ring expander to remove the piston rings. Do not expand the piston rings beyond the expansion necessary for removal.
  25. 17.1. Remove the top compression ring (1) to the top ring groove of the piston.
    17.2. Remove the second compression ring (2) to the middle ring groove of the piston.
    17.3. Remove the piston oil ring, the expander, and the second piston oil ring (3) to the bottom ring groove of the piston.
  26. Remove the piston pin from the piston and connecting rod assembly.
  27. Remove the piston pin from the opposite side of the piston.
  28. Remove the piston pin guide (7) through the piston (8) and the connecting rod (5).

Installation Procedure


    Object Number: 1225561  Size: MH
  1. Align the notch on the piston and the connecting rod so that the proper sides will be facing the front of the engine.
  2. Install the piston pin guide (7) through the piston (8) and the connecting rod (5).
  3. Coat the piston pin with clean oil.
  4. Install the piston pin into the opposite side of the piston.
  5. Install the piston pin into the piston and connecting rod assembly.

  6. Object Number: 1240583  Size: SH
  7. Select a set of new piston rings.
  8. Measure the piston ring gap using a feeler gage.
  9. If the piston ring gap is below specifications, increase the piston ring gap by carefully filing off excess material.

  10. Object Number: 1224591  Size: SH
  11. Measure the piston ring side clearance (1) using a feeler gage. Refer to Engine Mechanical Specifications .
  12. If the piston ring is too thick, try another piston ring.
  13. If no piston ring that fits to specifications can be found, the piston ring may be ground to size using emery paper placed on a sheet of glass.

  14. Object Number: 1225561  Size: MH
  15. Install a piston oil ring, the expander, and the second piston oil ring (3) to the bottom ring groove of the piston.
  16. Install the second compression ring (2) to the middle ring groove of the piston.
  17. Install the top compression ring (1) to the top ring groove of the piston.

  18. Object Number: 1224583  Size: SH
  19. Use a piston ring expander to install the piston rings. Do not expand the piston rings beyond the expansion necessary for installation.
  20. Stagger the piston oil rings (1, 4), the oil ring rail (5) gaps, the second compression ring (6), and the top compression ring (2) in relation to the notch on the top of the piston.

  21. Object Number: 1224586  Size: SH
  22. Lubricate the cylinder wall and the piston rings with clean engine oil.
  23. Install the piston using a ring compressor (1) and a wood handle. Guide the lower connecting rod end to prevent damaging the crankshaft journal.
  24. Notice: Avoid installing the bearing caps incorrectly. Cylinder head and camshaft damage may result.

  25. Install the connecting rod cap and the bearing. Refer to Piston, Connecting Rod, and Bearing Cleaning and Inspection .
  26. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1240799  Size: SH
  27. Install the connecting rod bearing cap nuts (1).
  28. Tighten
    Tighten the connecting rod bearing cap nuts to 33 N·m (24 lb ft).


    Object Number: 1240795  Size: SH
  29. Install the oil pump/pickup tube.
  30. Install the oil pump pickup tube bolts.
  31. Tighten
    Tighten the oil pump pickup tube bolts to 10 N·m (89 lb in).


    Object Number: 1240822  Size: SH
  32. Install the oil pan (2).
  33. Install the oil pan bolts (3) and nuts (1).
  34. Tighten
    Tighten the oil pan bolts and nuts to 10 N·m (89 lb in).


    Object Number: 1230302  Size: SH
  35. Install the lower engine mount bracket and the generator with the bolts (4).
  36. Install the upper engine mount bracket and the generator shackle with the bolts (5).
  37. Tighten

        • Tighten the upper engine mount bracket 38 N·m (28 lb ft).
        • Tighten the generator shackle bolts 38 N·m (28 lb ft).

    Object Number: 1230300  Size: SH
  38. Install the generator with the bolts and the nut (3).
  39. Tighten
    Tighten the generator lower bolts and the nut to 23 N·m (17 lb ft).

  40. Install the generator belt (2).
  41. Tighten
    Tighten the generator belt tension adjusting bolt to 23 N·m (17 lb ft).


    Object Number: 1222968  Size: SH
  42. Install the engine mount bracket.
  43. Install the air conditioning (A/C) compressor/power steering pump and the bracket with the bolts (2).
  44. Tighten

        • Tighten the engine mount bracket bolts (4) to 20 N·m (15 lb ft).
        • Tighten the A/C compressor/power steering pump bracket bolts (2) to 38 N·m (28 lb ft).

    Object Number: 1222970  Size: SH
  45. Install the power steering pump bracket with the bracket bolt/nut and adjusting bolt (1).
  46. Tighten

        • Tighten the adjusting bolt 22 N·m (16 lb ft)
        • Tighten the power steering rear bracket nut 22 N·m (16 lb ft)
  47. Install the power steering/air conditioning belt.
  48. Install the cylinder head with the intake manifold, the exhaust manifold, and distributor/adaptor attached. Refer to Cylinder Head Replacement .
  49. Install the timing belt. Refer to Timing Belt Replacement .
  50. Install the engine assembly to the engine compartment. Refer to Engine Replacement .
  51. Connect the negative battery cable.
  52. Start the engine and operate all systems.
  53. Operate the idle air control valve reset procedure, as necessary.