Main Bearing Cap Torque

CRANKSHAFT





1. Set main bearings in their proper positions on cylinder block and main bearing beam.
^ Confirm that correct main bearings are used. Refer to "Inspection".





2. Instructions for re-use of main bearing cap bolts.
^ A plastic zone tightening method is used for tightening 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.
Limit (d1 - d2): 0.11 mm (0.0043 inch)





Location: Front Mark





Sequence

3. After installing crankshaft, main bearing cap, main bearing beam and bearing cap bolts, tighten bearing cap bolts in numerical order as shown.
^ Make sure that the front mark on the main bearing beam faces the front of the engine.
^ Tightening procedure
a) Tighten all bolts to 32 to 38 Nm (3.3 to 3.9 kg-m, 24 to 28 ft. lbs.).
b) Turn all bolts 90 to 95 degrees clockwise with angle wrench.
^ Prior to tightening bearing cap bolts, place bearing beam in its proper position by shifting crankshaft in the axial direction.
^ After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
^ Lubricate threads and seat surfaces of the bolts with new engine oil.