|
Using a 14 mm -
12 points socket wrench, loosen the cylinder head bolts.
Loosen
each bolt evenly, little by little, by two or three
steps.
|
|
| caution |
provide one punch mark on the
head of the cylinder head bolt
each time the bolt is tightened. Replace the
bolt that already has three punch marks (the
evidence
of having been tightened three times)
|
|
|
1.Set special tool Valve
spring compressor (MD999597) as illustrated to compress the
valve
spring. Remove the retainer lock.
2.Relieve the
spring tension and remove the valve, retainer, spring, etc.
Store removed
valves, springs, and other parts, tagged to indicate their
cylinder no. and location for assembly.
|
|
1.Install the valve spring
seat.
2.The special tool Valve stem seal installer
(MH063609) must be used to install the
valve stem seal. Improper installation could result in oil
consumption through valve guide.
| caution |
Do not reuse removed valve
stem seals.
|
|
|
Direct the valve spring end with
identification color toward the spring retainer.
|
|
| caution |
The valve spring, if
excessively compressed, causes the bottom
end of the retainer to be in contact with, and
damage, the stem seal.
|
Compress the valve spring using the special tool
Valve spring compressor (MD999597), them
install the retainer lock.
|
|
1.In case any of the
cylinder block, piston, connecting rod and crankshaft has
not been
replaced, install the gasket of the same rank as before
which can be identified by the rank shown
in the illustration at left.
|
|
2.In case any of the
cylinder block, piston, connecting rod and crankshaft have
been replaced,
reselect and install the gasket in accordance with the
following procedure.
(1)
With each piston held at the top dead center, measure its
protrusion from the upper
block surface at the locations shown in the illustration at
left (total of eight locations).
Be sure to take measurements on the crankshaft center
line.
(2)
Using the average of the eight measurements, select the
gasket rank (A, B,C or D) in accordance
with the table given below. If, however, the maximum
protrusion at any one location exceeds
the protrusion tolerance shown for any rank in the following
table, use the gasket one rank
higher that rank.
Piston
projection
|
Cylinder head
gasket
|
Crankcase identification
mark
|
Maximum piston projection mark
mm
|
Type
by size
|
Tightend thickness
mm
|
A
|
-0.165 -
-0.205
|
A (1
notch)
|
0.66
-
0.74
|
B
|
-0.124 -
-0.164
|
B (2
notch)
|
0.71
-
0.79
|
C
|
-0.083 -
-0.123
|
C (3
notch)
|
0.76
-
0.84
|
D
|
-0.042 -
-0.082
|
D (4
notch)
|
0.81
-
0.89
|
| note |
If the piston projection
exceeds the tolerance, replace the piston,
connecting rod, crankshaft
or cylinder block and check again.
|
|
|
1.Apply a coat of specified
sealant to the upper surface of the front plate that joins
the
cylinder head gasket.
Specified
sealant:
Mitsubishi Genuine Part
No.MD970389 or equivalent
|
|
2.
| caution |
Before installing the cylinder
head bolt, check the number
of punch marks on its head. (the bolt is
reusable if it is two or less.) the number of
punch marks
corresponds to that to times the bolt has been
tightened to the plastic area. if the bolt has
three punch marks,
replace it.
|
Set the cylinder head bolt washer with its shear
droop toward the bolt head.
3.Apply engine oil to
the bolt threads and washers.
| note |
Using a 14 mm -
12 points socket wrench.
|
4.Tighten the bolts (M12) to 98 N·m in
the indicated sequence.
5.Loosen all the bolts
completely.
6.Tighten the bolts (M12) again to a
torque of 49 N·m in the indicated sequence.
After that, confirm all bolts are reached to the specified
torque, and then go to the next process.
|
|
7.Make paint marks on each
bolt’s head and on the cylinder
head.
8.
| caution |
- If the tightening angle is smaller than
90°, proper
fastening performance could not be
assured. Be sure to respect that
angle.
- If the bolt is tightened to an angle
greater than the specified angle, loosen
the
bolt completely and then retighten it
beginning with the first step.
|
Turn the bolts (M12) 90°
in the tightening direction and in the indicated
sequence.
9.Give another 90°
turn in the tightening direction to each bolt, making sure
that the paint mark on the bolt head and that on the
cylinder head are on the same line.
10.Tighten the
cylinder head bolt (M10 ×
125) to 58 ±
6 N·m.
|
