Procedure

NOTE: This procedure is with the engine mounted in work-stand and cylinder head removed.

REMOVAL
1. Remove any burrs or carbon deposits from the tops of the cylinder bores.





2. Remove the big-end bearing caps.





3. Install the protective sleeves on the connecting rod studs. Push the pistons and the connecting rods out of the cylinder bores. To ensure that the parts are refitted in their original positions, note the markings on the pistons and connecting rods, put the bearing shells and caps back in position on the respective connecting rods and keep each set separately.

INSTALLATION
1. Place the bearing shells in position in the connecting rods and fit protective sleeves over the connecting rod studs.





2. Oil the piston rings and bearings.











3. Install the pistons using piston ring compressor 78 62 287, or equivalent. Ensure that the notch in the piston crown points towards the timing cover and that the numbers on the connecting rod face the exhaust side.








4. Install the big-end bearing caps with bearing shells (with the identifying numbers on the bearing and bearing cap in line). The big-end bearing nuts should be fitted with the flanges down (towards the connecting rods) and tighten to 20 Nm (15 ft. lbs.), then a further quarter turn (through 90°).