ENGINETNV IDI Service Manual 6-55Cylinder Block7. Reinstall the oil ring expander(Figure 6-88, (4)). Install the oil ring(Figure 6-88, (3)) with the end gap at 180° fromthe expander end gap.8. Reinstall the second compression ring(Figure 6-88, (2)). This ring is identified by itsdark color and tapered face profile.9. Reinstall the top compression ring(Figure 6-88, (1)). This ring is identified by itssilver color and barrel-shaped face profile.IMPORTANTThe oil ring expander (Figure 6-88, (4)) endgap must be located 180° from the oil ring(Figure 6-88, (3)) end gap.Figure 6-8810. Stagger the piston ring end gaps at 120°intervals (Figure 6-89, (1, 2, and 3)). Do notposition the top piston ring end gap in line withthe wrist pin.1 – Top Compression Ring End Gap2 – Second Compression Ring End Gap3 – Oil Ring End GapFigure 6-89Installation of Crankshaft1. If removed, reinstall the key and timing gear oncrankshaft.2. Install new bearing inserts (Figure 6-90, (1))and thrust bearing (Figure 6-90, (2)) in thecylinder block and main bearing caps. Be surethe oil holes in the upper bearing shells alignwith the oil ports in the cylinder block. Apply aliberal coat of clean engine oil to the bearingsand crankshaft journals.(1)(2)(3)(4)0001722B(2)(1)(3)
