1.3.4 Main Bearings
DETROIT DIESEL 53
4. With the lower main bearing shells installed in the bearing caps, apply a small quantity of International Compound
No. 2, or equivalent, to the bolt threads and the bolt head contact area. Install the bearing caps and draw the bolts up
snug. Then rap the caps sharply with a soft hammer to seat them properly and tighten the bolts uniformly, starting with
the center bearing cap and working alternately towards both ends of the block, to 120-130 lb-ft torque.
NOTE: If the bearings have been installed properly, the crankshaft will turn
freely with all of the main bearing cap bolts drawn to the specified torque.
5.
Check the crankshaft end play as outlined under Install Crankshaft in Section 1.3.
6.
Install the lubricating oil pump and oil intake pipe assembly.
NOTE: If shims were used between the pump (8V engine) and the bearing caps,
install them in their original positions.
7.
Install the oil pan, using a new gasket.
8.
Fill the crankcase to the proper level on the dipstick with heavy-duty lubricating oil of the recommended
grade and viscosity (refer to Lubricating Oil Specifications in Section 13.3).
9.
After installing new bearing shells, operate the engine on a run-in schedule as outlined in Section 13.2.1.
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