Big-end bearings - refit

Big-end bearings - refit

1. Rotate crankshaft until big-end bearing journals are correctly positioned.
2. Lubricate crankshaft big-end journals with engine oil.
3. Fit new big-end bearing shells to connecting rods, lubricate shells with engine oil.

NOTE: Big-end bearing shells fitted to types ’B’ and ’C’ engines have no locating tags.

4. Taking care not to damage oil squirt jets or to displace bearing shells, pull connecting rods on to crankshaft journals.
5. Type ’A’ engines: Remove plastic sleeves from connecting rod bolts.
6. Check that new big-end bearing shells are correctly located on big-end bearing caps, lubricate shells with engine oil.
7. Fit big-end bearing caps ensuring that they are in their correct fitted order, and that on Type ’A’ engines, the tapered portion of machined flat on each cap is facing towards front of engine. For Type ’B’ and ’C’ engines, ensure the identification marks on the connecting rod and bearing cap are on the same side.
8. Type ’A’ engines: Lubricate threads of connecting rod bolts with engine oil. Fit nuts to their respective connecting rods and tighten to 48 Nm.
9. Type ’B’ and ’C’ engines: Lubricate threads and fit bolts to their respective connecting rods and tighten to 20 Nm then a further 90°.

PISTONS, CONNECTING RODS AND CYLINDER BORES

Pistons and connecting rods - remove

1. Remove crankshaft.

2. Remove and discard banjo bolts securing oil squirt jets to cylinder block, remove jets.

NOTE: Each jet is located by means of a roll pin.

3. Suitably identify each piston and connecting rod assembly to its respective cylinder bore.
4. Using assistance, lay cylinder block on its side.
5. Type ’A’ engines: Check that plastic tubes are still on connecting rod bolts.
6. Push each piston and connecting rod up cylinder bore taking care to keep connecting rod clear of bore walls; remove pistons and connecting rods.
7. Recover big-end bearing shells from connecting rods.

CAUTION: Big-end bearing shells should always be replaced whenever pistons and connecting rods are removed.