Mitsubishi Motors 4G9 - Manual (Page 155)

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4G9 ENGINE (E–W) – Piston and Connecting Rod 4G9 ENGINE (E–W) – Piston and Connecting Rod
11A-11-7
PWEE9502
E
May 1995 Mitsubishi Motors Corporation
"
F
A
CONNECTING ROD CAP INSTALLATION
(1) Mate the correct bearing cap with the correct connecting
rod by checking with the alignment marks marked during
disassembly. If a new connecting rod has no alignment
mark, position the notches for locking the bearing on
the same side.
(2) Check if the thrust clearance in the connecting rod big
end is correct.
Standard value: 0.10 – 0.25 mm
Limit: 0.4 mm
"
G
A
CONNECTING ROD CAP NUT INSTALLATION
Caution
If the cylinder head has been installed before installing
the connecting rod cap nut, be sure to remove the spark
plugs.
(1) Since the connecting rod cap bolts and nuts are torqued
using the plastic area tightening method, the bolts should
be examined BEFORE reuse. If the bolt threads are
“necked down”, the bolt should be replaced.
Necking can be checked by running a nut with fingers
to the full length of the bolt threads. If the nut does not
run down smoothly, the bolt should be replaced.
(2) Before installation of each nut, apply engine oil to the
thread portion and bearing surface of the nut.
(3) Install each nut to the bolt and tighten it with fingers.
Then tighten the nuts alternately to install the cap properly.
(4) Tighten the nuts to a torque of 20 Nm.
(5) Make a paint mark on the head of each nut.
(6) Make a paint mark on the bolt end at the position 90
_
to 100
_
from the paint mark made on the nut in the direction
of tightening the nut.
(7) Give a 90
_
to 100
_
turn to the nut and make sure that
the paint mark on the nut and that on the bolt are in
alignment.
Caution
1.
If the nut is turned less than 90
_
, proper fastening
performance may not be expected. When
tightening the nut, therefore, be careful to give
a sufficient turn to it.
2. If the nut is overtightened (exceeding 100
_
), loosen
the nut completely and then retighten it by
repeating the tightening procedure from step (1).
Cylinder No.
Notches
PWEE9502-K
E
Jun. 2002 Mitsubishi Motors Corporation Revised
Paint
mark
Paint mark
Nut
Bolt
90 _ – 100 _