Mitsubishi Evolution X. Manual — part 322
MAINTENANCE SERVICE
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GENERAL
00-63
MAINTENANCE SERVICE
1. FUEL SYSTEM (TANK, PIPE LINE AND
CONNECTION, AND FUEL TANK FILLER TUBE
CAP) (CHECK FOR LEAKS)
M1001001600367
Check for damage or leakage in the fuel lines and connections.
2. FUEL HOSES (CHECK CONDITION)
M1001001700331
1. Inspect the surface of fuel hoses for heat and mechanical
damage. Hard and brittle rubber, cracking, tears, cuts,
abrasions and excessive swelling indicate deterioration of
the rubber.
2. If the fabric casing of the rubber hose is exposed by cracks
and abrasions in the fuel system, the hoses should be
replaced.
3. AIR CLEANER ELEMENT (REPLACE)
M1001001800424
The air cleaner element will become dirty during use, reducing
its effectiveness. Replace it with a new one.
Replacement of air cleaner element
1. Unclamp the air cleaner housing.
2. Remove the air cleaner element and install a new one.
3. When clamping the air cleaner housing in place, be sure that
the cover is completed closed.
4. EVAPORATIVE EMISSION CONTROL SYSTEM
(EXCEPT EVAPORATIVE EMISSION CANISTER)
(CHECK FOR LEAKS AND CLOGGING)
M1001001900410
If the fuel-vapor vent line is clogged or damaged, fuel vapor will
escape into the atmosphere causing excessive emissions. Dis-
connect the line at both ends, and blow it clean with com-
pressed air. Remove the fuel tank filler tube cap from the filler
tube and check to see if there is evidence that the seal makes
improper contact to the filler tube.
AC709600AB
MAINTENANCE SERVICE
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GENERAL
00-64
5. SPARK PLUGS (REPLACE)
M1001002000476
CAUTION
Iridium plugs are used. Use care not to damage the iridium
tips of the plugs. Do not adjust the spark plug gap.
1. Spark plugs must spark properly to assure proper engine
performance and reduce exhaust emission level.
Therefore, they should be replaced periodically with new
ones.
Spark plug type
2. The new plugs should be checked for the proper gap.
Spark plug gap: 0.5
− 0.6 mm (0.020 − 0.023 inch)
3. Install the spark plugs and tighten to 18
± 2 N⋅ m (13 ± 1
ft-lb).
6. INTAKE AND EXHAUST VALVE CLEARANCE
(INSPECT AND ADJUST)
M1001012900180
NOTE: Perform the valve clearance check and adjustment at
the engine cold state.
1. Remove all of the ignition coils.
2. Remove the cylinder head cover.
CAUTION
Turn the crankshaft always clockwise.
3. Turn the crankshaft clockwise, and align the timing mark on
the exhaust camshaft sprocket against the upper face of the
cylinder head as shown in Figure. Therefore, No.1 cylinder
goes to the compression top dead center.
4. Using a thickness gauge, measure the valve clearance with
the arrow shown in Figure. If deviated from the standard
value, make note for the valve clearance.
Standard value:
Intake valve 0.20
± 0.03 mm (0.008 ± 0.0012 inch)
Exhaust valve 0.30
± 0.03 mm (0.012 ± 0.0012 inch)
Maker
Identifcation No.
NGK
ILKR8E6
AK704210 AB
Iridium
tip
Platinum
tip
AK604565
Timing mark
AC
10
11
12
7
8
8
3
4
4
3
1
2
2
1
5
6
6
5
9
AK502387AG
Intake valve side
No.1
No.2
No.3
Exhaust valve side
No.1
MAINTENANCE SERVICE
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GENERAL
00-65
5. Turn the crankshaft clockwise 360 degrees, and put the
timing mark on the exhaust camshaft sprocket in position
shown in Figure. Therefore, No.4 cylinder goes to the
compression top dead center.
6. Check the valve clearance with the arrow shown in Figure.
In the same procedure as 4.
7. If the valve clearance is deviated from the standard value,
remove the camshaft and the valve tappet. For the camshaft
removal, refer to Camshaft Removal and Installation
.
8. Using a micrometer, measure the thickness of the removed
valve tappet.
9. Calculate the thickness of the newly installed valve tappet
through the following equation.
A: thickness of newly installed valve tappet
B: thickness of removed valve tappet
C: measured valve clearance
Equation
Intake valve: A = B + [C
− 0.20 mm (0.008 inch)]
Exhaust valve: A = B + [C
− 0.30 mm (0.012 inch)]
NOTE: The valve tappet ranges 3,000
−
3,690 mm (0.1181
−
0.1453 inch) and has 47 types per 0.015 mm (0.0006 inch).
The thickness below a decimal point is stamped on the
reverse side of the valve tappet.
10.Install the valve tappet selected through the procedure 9,
and put the camshaft in position. For the camshaft
installation, refer to Camshaft Removal and Installation
.
11.After installing the timing chain, measure the valve
clearance using the procedure 3 to 6. Confirm the clearance
is within the standard value.
CAUTION
Completely remove all the old FIPG, which might be
remaining among the components.
12.After completely removing the liquid gasket adhering on the
timing chain case, cylinder block and cylinder head,
degrease them with white gasoline.
AK604566AC
Timing mark
10
11
12
7
8
8
3
4
4
3
1
2
2
1
5
6
6
5
9
AK502388 AF
Intake valve side
No.3
No.4
Exhaust valve side
No.2
No.4
AK304938
AE
Wall thickness
AK704211
0
0
3
0
.
AB
Thickness stamp
Under view
MAINTENANCE SERVICE
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GENERAL
00-66
CAUTION
The cylinder head cover should be installed within 3 min-
utes of applying liquid gasket.
13.Apply a 4 mm bead of liquid gasket as illustrated.
Specified sealant:
THREE BOND 1217G or exact equivalent
14. Install the cylinder head cover and tighten the tightening
bolts using the following procedures.
(1) Temporarily tighten to the following torque in order shown
in the illustration.
Tightening torque: 3.0
± 1.0 N⋅ m (27 ± 9 in-lb)
(2) Tighten to the specified torque in order shown in the
illustration.
Specified torque: 5.5
± 0.5 N⋅ m (49 ± 9 in-lb)
15.Install the ignition coils.
7. DRIVE BELT (FOR THE GENERATOR AND
POWER STEERING OIL PUMP) (REPLACE)
M1001002500589
1. Remove the radiator condenser tank. (Refer to GROUP 14
−
Radiator
).
CAUTION
Check the drive belt tension after turning the crankshaft
clockwise one turn or more.
2. Make sure that the indicator mark on the auto-tensioner is
within the area marked with A in the illustration.
3. If the mark is out of the area A, replace the drive belt (Refer
NOTE: The drive belt tension check is not necessary as the
auto-tensioner is adopted.
4. Install the radiator condenser tank. (Refer to GROUP 14
−
Radiator
).
AK
701438
Cylinder head
Timing chain case assembly
AD
φ 4.0 mm
(0.16 in)
φ 4.0 mm (0.16 in)
2.0 mm
(0.08 in)
2.0 mm
(0.08 in)
AK502760AF
10
16
15
14
17
18
1
3
4
11
12
9
5
2
6
7
8
13
AC506730 AC
A
Indicator mark
Auto-tensioner
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