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 TM 55-1905-223-24-3
(c) Clean the cylinder block deck surface.
NOTE
The top of the cylinder block must be flat and without damage or
distortion. Use a straight edge and a 0.002 inch (0.05 mm)
feeler gauge to check the surface.
(d) Inspect the liner bore and counterbore for cracks. If cracks are present, the cylinder block may
be used if:
1
Circumferential cracks do not extend into a cylinder head capscrew hole or water jacket hole.
2
Circumferential cracks do not extend beyond one-half the width of the counterbore ledge from the
radius.
CAUTION
Do not attempt to reuse the cylinder block if radial cracks extend
into the water jacket or the lubricating oil or water passages.
(e) Measure the diameter of the counterbore in the liner pr ss fit area (Figure 4-50).
e
1
Measure the counterbore from the top deck to 0.100 inch (2.54 mm) below the top deck of the
cylinder block.
2
If the counterbore diameter does not exceed 6.5635 inches (166.713 mm) standard liners may be
used.
3
If the counterbore diameter exceeds 6.5635 inches (166.713 mm) in the press fit area, replace the
cylinder block.
(f) Measure the depth of the counterbore at locations 1 and 2, Figure 4-51, at four equally
spaced points around the bore.
1
Measure at point 1 as close to the counterbore wall as possible.
2
Measure at point 2 as far from the counterbore wall as possible.
3
There must not be more than a total of 0.001 inches (0.03 mm) difference in the measurements
around the circumference of the counterbore.
4-103
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