Big end bearing failure can be identified by rattling in the crankcase and a drop in pressure.
1. Inspect the surface of the connecting rod bearings for chipping and scoring. Replace bearings where necessary with new ones of the same size. If the crankshaft has been reground, use new connecting rod bearing shells of the corresponding reduced repair size.
2. Check each connecting rod for bending, twisting and make sure it matches the stud diameter.
3. Put the connecting rods complete with liners on the corresponding connecting rod journals of the crankshaft and tighten the bearing cap bolts to the specified torque. Check radial misalignment for compliance with specifications. If the radial offset is too large, replace the connecting rod bearings with new ones.
4. To remove the piston from the connecting rod, remove the snap ring from both ends of the piston pin and knock it out of the small end of the connecting rod. The pistons should not be heated, because. piston pins are installed in them on a floating fit.
5. If necessary, replace the connecting rod small head bushing and piston pin. The difference in weight of any pair of six connecting rods must not exceed 5.0 g.
6. Set the piston to a position where the arrow on the bottom of the piston is facing forward and the tabs on the liners are directed towards the left side of the engine.