(6) Measure inside diameter of the packing ring bore (4, FIG. 4-85). Verify measurement is
within specifications in Table 4-8 .
FIGURE 4-85. Packing Ring Bore Measurement.
The parting line of the main bearing cap is not the same height as the centerline of
the main bearing bore.
If the block height is less than 18.994 inch (482.42 mm), a 0.020 inch (0.51 mm)
oversize head gasket must be installed.
If checking ring or centering ring is not available, block height can be measured
from top of main bearing saddle (19, FIG. 4-86). If block height is less than
15.570 inch (395.48 mm), a 0.020 inch (0.51 mm) oversize head gasket must
(7) Measure height of cylinder block (18, FIG. 4-86). Verify height is within specifications in
Table 4-8 . Verify height does not vary more than 0.003 inch (0.08 mm) from end-to-end of
the block and more than 0.005 inch (0.13 mm) between the banks.
FIGURE 4-86. Block Height Measurements.