Mitsubishi 4G9 series

4G9 ENGINE (E-W) -
Piston and Connecting Rod
11A-11-7
PWEE9502
E
May 1995Mitsubishi Motors Corporation
(5) Make a paint mark on the head of each nut.
(6) Make a paint mark on the bolt e nd at the position 90
_
to 100
_
from t he paint mark made on th e nu t in th e 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 thenutis overtightened(exceeding 100
_
),loosen
the nut completely and then retighten it by
repeating the tightening procedure from step (1).
INSPECTION
11300850074
PISTON RING
(1) Check the clearance between the piston ring and ring
groove. If the limit is exceeded, replace the ring or piston,
or both.
Standard value:
No.1: 0.03 - 0.07 mm
No.2: 0.02 - 0.06 mm
Limit:
No.1: 0.1 mm
No.2: 0.1 mm
Install t he piston ring into the cylinder bore. Force th e
ring down with a piston, the piston crown being in contact
with the ring, to correctly position it at right angles to
the cylinder wall. Then, measure the end ga p with a
thickness gauge.
If the ring gap is excessive, replace the piston ring.
Standard value:
No.1: 0.25 - 0.40 mm
No.2: 0.40 - 0.55 mm
Oil:
SOHC: 0.20 - 0.60 mm
DOHC: 0.10 - 0.35 mm
Limit:
No.1, No.2: 0.8 mm
Oil: 1.0 mm
90
_
- 100
_
Paint
mark
Paint mark
Nut
Bolt
Push in by
the piston
Piston ring
Piston
ring gap