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 TM 55-1905-221-14-4
6-29. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION/ITEM
ACTION
REMARKS
INSPECT (Cont)
j. Replace loose or damaged
dowel pins. The dowels at
the ends of the cylinder
block must extend .630 inch
from cylinder blocks.
The dowels used to retain
the crankshaft thrust
washers on the rear main
bearing cap must extend
.110 inch to .120 inch from
the surface of the bearing
cap.
k. If used, replace damaged
or broken cylinder head
studs. Drive new studs to a
height of 4-3/8 inch 1/32
inch above the block at a
minimum of 75 lb-ft (101.7
Nm) torque. Also, examine
the cylinder head retaining
bolt holes. If the threads
are damaged, use a tap to
"clean-up" the threads or
install an helical thread
insert.
l. The tapped holes in the
cylinder blocks may be
tapped with a 5/8 inch-11
UNC3B thread tap. The stud
holes and unplugged bolt
holes must have the thread
extending 1.84 inches below
the block surface.
6-541
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