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 TM 55-1905-220-14-10
5-43. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECT (Cont)
g. Check the top of the block (cylinder head contact surfaces) for flatness with an
accurate straight edge and a feeler gage.
(1) The top surface of the block must not vary more than .003 inch transversely
and not over .006 inch, .007 inch or .009 inch longitudinally on the 3, 4 and 6
cylinder blocks respectively. It will be difficult to prevent water, oil, and
compression leaks if the top surface of the block exceeds these tolerances.
(2) If it is necessary to machine these surfaces to correct for the above conditions,
do not remove more than .008 inch of metal. Stamp the amount of stock
removed on the face of the block. The distance from the centerline of the
crankshaft to the top of the cylinder head surface of the block must not be less
than 16.176 inches.
5-636
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