Bearings - Connecting Rods Engine Set
12.17.16.01 Bearings - connecting rods engine setRemove
1. Remove oil pump.
Disassembly
1. With a socket and bar fitted to crankshaft pulley bolt, rotate crankshaft in direction of rotation to gain access to connecting rod bearing cap bolts.
2. Mark connecting rod and bearing cap in relation to cylinder number.
NOTE: Connecting rods and caps have reference marks which align for assembly.
3. Loosen and remove big-end bearing cap bolts, do not discard bolts at this stage.
4. Remove big-end bearing cap, remove and discard bearing shell.
5. Move connecting rod clear of crankshaft journal.
6. Remove bearing shell from connecting rod, discard the bearing shell.
NOTE: Blue color coded big-end bearing shells are fitted to the connecting rods and Red color coded big end bearing shells are fitted to the bearing caps.
7. Repeat above procedure for remaining connecting rod bearings. Keep big-end bearing caps in fitted order.
Inspect
1. Wipe big-end journals, new bearing shells, connecting rods and bearing caps.
2. Measure and record each crankshaft big-end journal diameter, taking 4 measurements at 90° intervals on each
journal.
3. Clean and lubricate the original big end bearing cap bolts.
4. Position crankshaft with journal at BDC.
5. Fit a new BLUE color coded big-end bearing shell to the connecting rod.
6. Fit a new RED color coded big-end bearing shell to the bearing cap.
7. Pull connecting rod onto big-end journal.
8. Place a strip of Plastigage across the big-end journal.
9. Fit big-end bearing cap, ensure reference marks on connecting rod and the cap are aligned.
CAUTION: Do not rotate the crankshaft when Plastigage is being used.
10. Fit the original big end bearing cap bolts and tighten to 5 Nm (3.7 ft. lbs.) then tighten to 20 Nm (15 ft. lbs.) and finally, using an angle gauge, tighten a further 80°.
CAUTION: Do not rotate the crankshaft when Plastigage is being used.
11. Remove bolts securing cap to connecting rod and remove the bearing cap.
12. Using the scale provided, measure the width of Plastigage on journal and compare with bearing clearance.
13. If correct bearing clearance cannot be obtained with the available bearing shells, the crankshaft must be replaced.
14. Retain selected bearing shells with connecting rod and bearing cap.
15. Remove all traces of Plastigage using clean engine oil and a cloth.
16. Repeat the above procedure for the remaining big-end bearings.
17. After completion of big-end bearing clearance checks, discard original bearing cap bolts.
Reassembly
1. Lubricate crankshaft journals and selected bearing shells with clean engine oil.
2. Pull connecting rod onto its journal making sure the bearing shell is located correctly.
3. Fit big-end bearing cap, ensure reference marks on connecting rod and the cap are aligned.
4. Clean and lubricate new big-end bearing cap bolts.
5. Fit the new big end bearing cap bolts and tighten to 5 Nm (3.7 ft. lbs.), then tighten to 20 Nm (15 ft. lbs.) and finally, using and angle gauge, tighten a further 80°.
Refit
1. Fit oil pump.