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Piston, Connecting Rod, and Bearing Replacement

Special Tools

EN-50174 Piston Ring Compressor

For equivalent regional tools, refer to Special Tools

Removal Procedure

  1. Remove the cylinder head. Refer to Cylinder Head Replacement : with CH-49290 → with EN-50176 .
  2. Remove the sump. Refer to Sump Replacement
  3. Raise the vehicle by its full height. Refer to Lifting and Jacking the Vehicle .
  4. Install the crankshaft balancer bolt.
  5. Set the pistons 1 and 4 to BDC in direction of engine rotation.

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  7. Mark the connecting rod with the big end bearing cover (1).

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  9. Remove the 4 big end bearing caps nuts (2) of cylinder 1 and 4.
  10. Remove the big end bearing caps (1) and the big end bearing (3).

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  12. Push the pistons 1 and 4 (1) out of the cylinder bore (2).
  13. Lower the vehicle.
  14. 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.

  15. Remove the pistons 1 and 4 (1).
  16. Raise the vehicle by its full height.
  17. Turn crankshaft on crankshaft balancer through 180 degrees in direction of rotation of engine.
  18. Repeat for the piston 2 and 3.

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    Note: Observe correct fitting position, observe alignment.

  20. Remove the big end bearing (1, 2).
  21. Check the components. Refer to Piston, Connecting Rod, and Bearing Cleaning and Inspection .

Installation Procedure


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    Note: Lubricate the connection rod bearing with NEW engine oil.

  1. Install the big end bearing (1, 2).

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  3. Set piston ring joints.
  4. • Piston compression upper ring in position (1).
    • Piston compression lower ring in position (4).
    • Interim ring of the piston oil ring rail in position (5), steel band rings of the piston oil ring rail in position (2) and/or (3).

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  5. Lubricate the piston rings, piston (1), inner cylinder bore surface and EN-50174 piston ring compressor (2) with clean engine oil.

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    Note: Arrow on piston head points to engine timing side, bead on connecting rod points to transmission side of engine.

  7. Push the pistons 2 and 3 (1) into the cylinder bore (2).
  8. Raise the vehicle by its full height.

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  10. Install the big end bearing caps (1) and the big end bearing (3).
  11. Caution: Refer to Fastener Caution in the Preface section.

  12. Install 4 NEW big end bearing caps bolts (2) of cylinder 2 and 3 and tighten to 33 N·m (24 lb ft).
  13. Turn crankshaft on crankshaft balancer through 180 degrees in direction of rotation of engine.
  14. Repeat for the piston 1 and 4.
  15. Set the crankshaft in direction of engine rotation to 60 degrees before UDC.
  16. Install the oil pan. Refer to Sump Replacement .
  17. Install the cylinder head. Refer to Cylinder Head Replacement : with CH-49290 → with EN-50176 .
   


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