Main Bearing Cap Torque Values

LOOSENING

1. Remove main bearing cap bolts following the sequence shown.
2. Bolts should be loosened in two or three steps.

NOTE: Before removing bearing beam and bearing cap, measure crankshaft end play.





TIGHTENING

1. A plastic-zone tightening method is used for tightening the main bearing cap bolts. Measure d1 and d2 as shown in the figure.
- d2: Select minimum diameter in the measuring area.
- If the difference between d1 and d2 exceeds the limit, replace the bolts with new ones. The limit (d1 - d2) is 0.11 mm (0.0043 inch)





2. After installing crankshaft, main bearing cap, main bearing beam and bearing cap bolts, tighten bearing cap bolts in numerical order as follows:





NOTE: Prior to tightening bearing cap bolts, place bearing beam in its proper position by shifting crankshaft in the axial direction.

3. Lubricate threads and seat surfaces of the bolts with new engine oil.
4. Tighten all bolts to 32 - 38 Nm (24 - 28 ft. lbs.).
5. Turn all bolts 90 - 95° clockwise with an angle wrench.
6. After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.