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 TM 55-1905-219-14-10
5-20. CYLINDER BLOCK-MAINTENANCE INSTRUCTIONS (Continued).
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 gauge.
(1)
The cylinder head contact surfaces of the block
must not vary more than .003 inch transversely
and' not over .009 inch longitudinally. It will
be difficult to prevent water, oil and compres-
sion leaks if these surfaces exceed these toler-
ances.
(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 inch.
5-370
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