Piston, Connecting Rod, and Bearing Replacement
Special Tools
EN-50174 Piston Ring Compressor
For equivalent regional tools, refer to Special Tools
Removal Procedure
- Remove the cylinder head. Refer to
Cylinder Head Replacement : with CH-49290 → with EN-50176 .
- Remove the sump. Refer to Sump Replacement
- Raise the vehicle by its full height. Refer to Lifting and Jacking the Vehicle .
- Install the crankshaft balancer bolt.
- Set the pistons 1 and 4 to BDC in direction of engine rotation.
- Mark the connecting rod with the big end bearing cover (1).
- Remove the 4 big end bearing caps nuts (2) of cylinder 1 and 4.
- Remove the big end bearing caps (1) and the big end bearing (3).
- Push the pistons 1 and 4 (1) out of the cylinder bore (2).
- Lower the vehicle.
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.
- Remove the pistons 1 and 4 (1).
- Raise the vehicle by its full height.
- Turn crankshaft on crankshaft balancer through 180 degrees in direction of rotation of engine.
- Repeat for the piston 2 and 3.
Note: Observe correct fitting position, observe alignment.
- Remove the big end bearing (1, 2).
- Check the components. Refer to Piston, Connecting Rod, and Bearing Cleaning and Inspection .
Installation Procedure
Note: Lubricate the connection rod bearing with NEW engine oil.
- Install the big end bearing (1, 2).
- Set piston ring joints.
• | 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). |
- Lubricate the piston rings, piston (1), inner cylinder bore surface and EN-50174 piston ring compressor (2) with clean engine oil.
Note: Arrow on piston head points to engine timing side, bead on connecting rod points to transmission side of engine.
- Push the pistons 2 and 3 (1) into the cylinder bore (2).
- Raise the vehicle by its full height.
- Install the big end bearing caps (1) and the big end bearing (3).
Caution: Refer to Fastener Caution in the Preface section.
- Install 4 NEW big end bearing caps bolts (2) of cylinder 2 and 3 and tighten to 33 N·m (24 lb ft).
- Turn crankshaft on crankshaft balancer through 180 degrees in direction of rotation of engine.
- Repeat for the piston 1 and 4.
- Set the crankshaft in direction of engine rotation to 60 degrees before UDC.
- Install the oil pan. Refer to Sump Replacement .
- Install the cylinder head. Refer to
Cylinder Head Replacement : with CH-49290 → with EN-50176 .
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