Connecting Rod Bearing: Service and Repair
Connecting Rod BearingREMOVAL
1. Remove oil pan.
2. Remove nut and washers securing oil pick-up pipe to stud.
3. Remove 2 bolts securing oil pick-up pipe to oil pump cover, withdraw pipe from cover; remove and discard O-ring.
4. Remove oil pick-up pipe, recover spacer from stud.
5. Suitably identify bearing caps to their respective connecting rods.
6. Remove 2 bolts securing each bearing cap.
7. Remove bearing cap and bearing shell.
NOTE: Keep bearing caps and bolts in their installed order.
8. Push each piston up its respective bore and remove shells from connecting rods.
NOTE: Connecting rod bearing shells must be replaced whenever they are removed.
INSTALL
1. Install bearing shells to each connecting rod.
NOTE: Connecting rod bearings are available in 0.254 mm and 0.508 mm oversizes.
2. Lubricate bearing shells and crankshaft journals with engine oil.
3. Pull connecting rods on to crankshaft journals.
4. Install bearing shells to each connecting rod bearing cap.
NOTE: If crankshaft has been reground, ensure appropriate oversize bearing shells are installed.
5. Lubricate bearing shells and install bearing caps ensuring reference marks on connecting rods and bearing caps are aligned.
NOTE: Rib on edge of bearing cap must face towards front of engine on RH bank of cylinders and towards rear on LH bank of cylinders.
6. Install bearing cap bolts and tighten to 20 Nm then further 80°.
7. Check connecting rods move freely sideways on crankshaft. Tightness indicates insufficient bearing clearance or misaligned connecting rod.
8. Check clearance between connecting rods on each crankshaft journal.
Connecting rod clearance: 0.15 to 0.36 mm.
9. Clean oil strainer and oil pick-up pipe.
10. Smear a new O-ring with engine oil and install to oil pick-up pipe.
11. Position oil pick-up pipe spacer on number 4 main bearing cap stud.
12. Install oil pick-up pipe ensuring that end of pipe is correctly inserted in oil pump body.
13. Install oil pick-up pipe to oil pump body bolts and tighten to 8 Nm.
14. Install washers and nut securing oil pick-up pipe to stud: tighten nut to 24 Nm.
15. Install oil pan.