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 TM 55-1905-220-14-10
5-43. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECT (Cont)
(3) If stock is removed from the cylinder head contact surfaces of the block, check the
depth of the seal ring grooves and counterbores. The cylinder head seal strip
grooves must be .092 inch - .107 inch deep. The large water hole counterbores
(between the cylinders) must be .109 inches - .120 inches deep, and the
combination water and oil hole counterbores and small waterhole counterbores
must be .087 inches - .098 inches deep. If necessary, deepen the grooves or
counterbores to the specified limits to retain the proper "crush" on the seal rings. It
is not necessary to deepen the counterbores for the cylinder liners since .004 inch
and .008 inch under- size thickness inserts are available for adjusting the liner
position as outlined in Chapter 3, paragraph 3-98, under Fitting Cylinder Liner in
Block Bore.
5-637
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