3-34. ENGINE BLOCK REPAIR (Contd)
c. Inspection and Repair (Contd)
18. Bearing cap (19),
Install on engine block (14) and
Ensure bearing caps (19), (20),
three bearing caps (20) and
tighten as follows:
and (21) are in their correct
(21), fourteen washers (17),
location and position.
and screws (18)
a. Tighten fourteen screws (18) to
85 lb-ft (115 Nm) in sequence
shown. Then tighten each screw
(18) to 250-260 lb-ft (339-353 Nrn).
b. Loosen fourteen screws (18)
three to five threads or a
minimum of three complete turns.
c. Repeat step 18a.
19. Bores of installed bearing
Install bore alignment checking
Use bore alignment checking bar
caps (19), (20), and (21) of
bar. Measure bore diameter of
(ST-1157). For greater accuracy,
engine block (14)
each at three different locations.
place engine block (14) on end
before measuring bore diameter.
Minimum bore is 4.7485 in.
(120.6119 mm); maximum is
4.7505 in. (120.6627 mm). Discard
if maximum is exceeded.
Never use reamer in place of a check bar. Damage to cylinder block will result.
20. Bore alignment of installed
a. Install suitable bore alignment
Bore alignment checking bar
bearing caps (19), (20), and
checking bar. Inspect for burrs
(ST-1157) should turn freely.
(21) of engine block (14)
or slight binding.
Remove burrs with emery cloth.
If a slight bind exists, perform
b. If necessary, remove 0.0002-
If alignment cannot be obtained,
0.003 in. (0.0051-0.076 mm) of
refer to step 21 and ream bore
stock from bottom milled surface
of installed bearing caps (19),
of the main bearing caps which
(20), and (21).
are out of alignment. Remove
stock by lapping or surface