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Piston, Connecting Rod, and Bearing Removal

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  1. Install the crankshaft balancer bolt.
  2. Set the pistons 1 and 4 to TDC in direction of engine rotation.
    3. Fig 1: Connecting Rod And Bearing Cap
    GM1948709Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Note cylinder sequence.

  3. Mark the connecting rod with the connecting rod bearing cover (1).
    4. Fig 2: Connecting Rod Bearing, Connecting Rod Bearing Caps And Bolts
    GM2028299Courtesy of GENERAL MOTORS COMPANY
  4. Remove the 4 connecting rod bearing caps bolts (2) of cylinder 1 and 4.
  5. Remove the connecting rod bearing caps (1) and the connecting rod bearing (3).
    6. Fig 3: Pistons 1, 4 And Cylinder Bore
    GM2028300Courtesy of GENERAL MOTORS COMPANY
  6. Push the pistons 1 and 4 (1) out of the cylinder bore (2).
    7. NOTE:

    The shear surfaces of the con-rod and the con-rod bearing cover form a unique fit and must not be swapped or damaged. Do not lay down on the shear surfaces.

  7. Remove the pistons 1 and 4 (1).
  8. Turn crankshaft on crankshaft balancer through 180° in direction of rotation of engine.
    9. Fig 4: Connecting Rod And Bearing Cap
    GM1948709Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Note cylinder sequence.

  9. Mark the connecting rod with the connecting rod bearing cover (1).
    10. Fig 5: Connecting Rod Bearing, Connecting Rod Bearing Caps And Bolts
    GM2028299Courtesy of GENERAL MOTORS COMPANY
  10. Remove the 4 connecting rod bearing caps bolts (2) of cylinder 2 and 3.
  11. Remove the connecting rod bearing caps (1) and the connecting rod bearing (3).
    12. Fig 6: Pistons 2, 3 And Cylinder Bore
    GM2028301Courtesy of GENERAL MOTORS COMPANY
  12. Push the pistons 2 and 3 (1) out of the cylinder bore (2).
    13. NOTE:

    The shear surfaces of the con-rod and the con-rod bearing cover form a unique fit and must not be swapped or damaged. Do not lay down on the shear surfaces.

  13. Remove the pistons 2 and 3 (1).
    14. Fig 7: Connecting Rod And Bearings
    GM2028302Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Observe correct fitting position, observe alignment.

  14. Remove the connecting rod bearing (1, 2).
  15. Check the components. Refer to Piston, Connecting Rod, and Bearing Cleaning and Inspection .
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