TM 5-1940-277-34
ENGINE BLOCK INSPECTION AND REPLACEMENT INSTRUCTIONS
(Continued)
LOCATION
ITEM
ACTION
REMARKS
c.
Inspect all
Use 1/2 in UNC-3A
threaded
thread cutting
holes for
die if bolt
cross thread-
holes need
ing.
retapping. Full
thread depth is
1 in. (25 mm).
d.
Replace block
if:
• Warped beyond
limits
• Cracked.
b.
Main bearing
a.
Inspect cap
caps (4)
alinement:
• Install 7
Use 7/8 in socket
main bearing
and torque
caps and 14
wrench (0 - 175
cap bolts,
ft-lb).
torque bolts
to 115 - 120
ft-lb.
• Measure main
Use micrometer
bearing
caliper, inside.
bores, limit
3.1665 to
3.1673 in.
• Remove main
Make sure loca-
bearing caps
ting tongues
and install
engage in loca-
lower main
ting grooves.
bearing
The center and
halves into
rear lower
caps.
bearing halves
have oil grooves.
• Install
Make sure loca-
upper main
ting tongues
bearing
engage in loca-
halves into
ting grooves.
cylinder
Upper bearing
block.
halves have oil
feed hole and
oil groove.
3-95
