TM 5-3810-300-24 & P3
Cylinder Block 1.1
.0015" throughout
the
entire
circumference.
The
counterbored surfaces must be smooth and square with the
cylinder bore within .001 "total indicator reading. There must
not be over .001 "difference between any two adjacent cylinder
counterbores when measured along the cylinder longitudinal
centerline of the cylinder block.
7. Check the main bearing bores as follows:
a. Check the bore diameters with the main bearing caps
in their original positions. Apply a small quantity of
International Compound No. 2, or equivalent, to the
threads on the bolts or studs and nuts and to the bolt
head (or nut) contact area. Then install and tighten
the bolts to 165-175 Lb-ft (224-238 Nm) torque or
Fig. 15 - Checking Top Face of Cylinder Block
stud nuts to 140-155 Lb-ft (190-211 Nm) torque.
The specified bore diameter is 3.812" to 3.813". If
the specified limits to retain the proper "crush" on the
the bores do not fall within these limits, the cylinder
seal rings. It is not necessary to deepen the
block must be rejected.
counterbores for the cylinder liners since .004" and
.008" undersize thickness inserts are available for
CAUTION1: Main bearing cap bolts are
adjusting the liner position as outlined in Section
especially designed for this purpose and
1.6.3 under Fitting Cylinder Liner in Block Bore.
must not be replaced by ordinary bolts.
6. Make sure the cylinder liner counterbores in the block are
NOTE: Bearing caps are numbered to
clean and free of dirt. Then check the depth (Fig. 17). The
correspond with their respective positions in
cylinder bores have been counterbored to a depth which will
the cylinder block. It is imperative that the
accommodate an approximately 3/16" thick replaceable liner
bearing caps are reinstalled in their original
insert. The depth must be .4770" to .4795" and must not vary
positions to maintain the main bearing bore
more than
alignment. The number of the front main
bearing cap is stamped on the face of the
oil pan mounting flange of the cylinder block,
adjacent to its permanent location in the
engine as established at the time of
manufacture. The No. 1 main
Fig. 17 - Checking Depth of Counterbore for
Fig. 16 - Minimum Distance from Center
Cylinder Liner with Tool J 22273
Line of Crankshaft to Top of Cylinder Block
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