Mitsubishi 4g63, Руководство по обслуживанию

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PISTON AND CONNECTING ROD
ENGINE OVERHAUL <4G63-Turbo> 11D-60
>>F<< CONNECTING ROD CAP
INSTALLATION
1. Install the bearing cap on the connecting rod while
aligning the marks made during disassembly. If
the connecting rod is new and has no alignment
mark, assemble it with the cap such that the both
bearing locating notches are on the same side as
shown in the drawing.
2. Make sure that the thrust clearance of the
connecting rod big end is proper.
Standard value: 0.10
−
0.25 mm
Limit: 0.4 mm
>>G<< CONNECTING ROD CAP NUT
INSTALLATION
1. The connecting rod cap bolts and nuts are
tightened using the torque-to-yield method. For
this reason, each bolt to be reused must be
checked for elongation before installation.
Whether or not the bolt has been elongated can
be determined by running a nut with fingers
through all the threads of the bolt. If the nut does
not turn smoothly over all the threads, the bolt has
been elongated and must be replaced.
2. Apply engine oil to the threads and bearing
surface of each nut before installation.
3. Finger-tighten the nuts on the bolts, then tighten
the nuts alternately and repeatedly to install the
cap properly.
4. Tighten the nuts to a torque of 20
±
2 N
⋅
m.
5. Make a paint mark on the head of each nut.
CAUTION
•
If the tightening angle is less than 90
°
, ade-
quate tightness could not be assured.
• If the tightening angle exceeds 94 ° , loosen the
nut completely and then perform the tighten-
ing procedure again beginning with the first
step.
6. Make a paint mark on the bolt at a point 90
°
to 94
°
away from the paint mark made on the nut in the
tightening direction.
7. Turn the nut 90
°
to 94
°
to bring the mark on the
nut into alignment with that on the bolt.
INSPECTION
M1113008500688
PISTON RING
1. Measure the clearance between each piston ring
and its groove. If the limit is exceeded, replace the
ring or piston, or both.
Standard values:
No. 1 ring: 0.03
−
0.07 mm
No. 2 ring: 0.02
−
0.06 mm
Limits: 0.1 mm
AK300193
Notches
Cylinder
number
AD
AK202821
AK300612
Paint marks
Nut
Bolt
Paint marks
90˚ to 94˚
AC
AK202787