Crankshaft: Service and Repair

CRANKSHAFT AND MAIN BEARINGS

REMOVAL
1. Remove the upper oil pan.
2. Remove the oil pump.
3. Remove the rear crankshaft radial seal.
4. Remove the timing chain.

NOTE: When rotating the crankshaft, ensure that the connecting rods are not twisted.





NOTE: Mark the connecting rod and the connecting rod bearing cap (1) on one side next to each other for this step.





5. Remove the connecting rod bolts (1).

NOTE: Do not dislodge the connecting rod bearings from the connecting rods.





6. Remove the connecting rod caps (1) with the bearings in place.
7. Relocate the connecting rods away from the crankshaft.





NOTE: Mark the crankshaft bearing caps before removing.

CAUTION: Carefully pry out the crankshaft bearing caps.

8. Remove the crankshaft main bearing journal cap side bolts (2).
9. Remove and discard the crankshaft main bearing journal cap bolts (1).
10. Remove the crankshaft main bearing journal cap bolts (3).





11. Remove the crankshaft (1) from the engine block.





12. Remove the crankshaft main bearing shells (1) and thrust washers (2) from the crankcase.
13. Remove the crankshaft main bearing shells from the crankshaft main bearing journal caps.

INSTALLATION





NOTE: Clean all the journals with solvent and dry throughly before installing bearings.

1. Fit the upper main bearing shells (6) to the engine block's main journals.
2. Fit the thrust washers (7) into the engine block.
3. Coat the surface of bearings lightly with engine oil.
4. Position the crankshaft in the engine block.
5. Fit the lower main bearing shells (5) into the main bearing journal caps (4).

CAUTION: The crankshaft main bearing journal cap bolts M8X75 and M10X90 must always be replaced otherwise there is a risk of fracture.

6. Install the main bearing journal caps (4).





7. Follow the torque sequence shown for the crankshaft main bearing journal cap bolts.
8. Main bearing journal caps must be tightened in two stages.
^ Stage one for m8 bolts, 20 Nm (15 ft. lbs.).
^ Stage two for m8 bolts, rotate 90° clockwise.
^ Stage one for m10 bolts, 30 Nm (22 ft. lbs.).
^ Stage two for m10 bolts, rotate 90° clockwise.





CAUTION: Connecting rod bolts exceeding 47.6 mm in length must be replaced.

9. Install the connecting rod caps and the bolts to the connecting rod as marked.
10. Install the oil pump.
11. Install the upper oil pan.
12. Install the timing chain.
13. Install a new crankshaft rear radial seal.