Disassembly

NOTE: End play for the connecting rods and crankshaft should be inspected before removing the crankshaft.





1. Remove the oil pan, oil screen and the oil pump.
2. Remove the baffle plate.
3. Turn the crankshaft so No. 2 and 3 crankpins are at the bottom.





4. Remove the right side cover.





5. Remove the bearing cap bolts.

CAUTION: To prevent warpage, unscrew the bolts in sequence 1/3 turn at a time; repeat the sequence until all bolts are loosened.





6. Remove the cap bridge (B18C1, B18C5 engines only) and main caps/bearings. Keep all caps/bearings in order.
7. Remove the rod caps/bearings. Keep all caps/bearings in order.





8. Lift the crankshaft out of the engine, being careful not to damage journals.
9. Remove the upper bearing halves from connecting rods and set them aside with their respective caps.
10. Reinstall main caps and bearings on the engine in proper order.





11. If you can feel a ridge of metal or hard carbon around the top of each cylinder, remove it with a ridge reamer. Follow the reamer manufacturer's instructions.

CAUTION: If the ridge is not removed, it may damage the pistons as they are pushed out.





12. Use the wooden handle of a hammer to drive the pistons out.

CAUTION:
- Take care not to damage the contact surface of the metal gasket.
- When removing the piston/connecting rod, take care not to hit the oil jet (B18C1, B18C5 engines). If the oil jet nozzle is damaged or bent, replace the oil jet assembly.

13. Reinstall the rod bearings and caps after removing each piston/connecting rod assembly.
14. Mark each piston/connecting rod assembly with its cylinder number to avoid mix-up on reassembly.

NOTE: The existing number on the connecting rod does not indicate its position in the engine, it indicates the rod bore size.