Detroit Diesel — Installation of Crankshaft

Repair & overhaul

From a Detroit Diesel service manual — check it applies to your exact model before use.

Procedure

1. Steam clean the crankshaft to remove rust preventive; blow out oil passages.
2. Install the upper main bearing shells in the block.
3. Install the thrust washer upper halves on either side of the No. 6 bearing saddle.
4. Apply clean engine oil around all crankshaft bearing journals and install the crankshaft.
5. Install the lower main bearing shells in the main bearing caps.
6. Check main bearing cap bolt length.
7. Install the main bearing caps with lower bearing shells.
8. Apply clean engine oil to bolt threads and undersides of bolt heads; install and snug main bearing cap bolts.
9. Torque main bearing cap bolts to 50 N·m; check crankshaft end play (0.099-0.419 mm).
10. DD13: torque main cap bolts to 150 N·m, 300 N·m, then 90° torque turn.
11. DD15: torque main cap bolts to 150 N·m, 250 N·m, 1st 90° torque turn, 2nd 90° torque turn.
12. Install piston and connecting rod assemblies and cylinder head.
13. Install camshaft housing and gear train; install flywheel housing.
14. Replace rear and front crankshaft seals; install flywheel and oil pump.
15. Install crankshaft pulley and vibration damper; install oil pan.

Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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