TM 5-4320-300-146-7. CYLINDER HEAD AND BLOCK (CONT)Location/ItemActionRemarks57. Cylinder boreMeasure the entire bore of each cylinder withinside diametera cylinder bore gage which has a dial indicatorcalibrated in 0.0001 inch (0.00254 mm) in-crements. Measure inside diameter of bore atplaces A, B, C, and D on XZ and WY axis.Bore diameter at position A should not ex-ceed 4.5235 inches (114.897 mm), at posi-tion B 4.490 inches (114.046 mm), or atposition C and D 4.3595 inches (110.731 mm).NOTEIf a sealing problem has occurred with the above dimensions at positions A andB, the block must be replaced.58. Cylinder boreCheck bores for out-of-round and taper.out-of-roundOut-of-round and taper must not exceedand taper0.0015 inch (0.0381 mm).6-42
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