Mitsubishi Evolution X. Manual — part 54
BASE ENGINE
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ENGINE
11-14
VALVE TAPPETS
To adjust the valve lift, 47 sizes of valve tappets are
available in 0.015 mm (0.0006 in) increments, from
3.000 mm (0.1181 inch) to 3.690 mm (0.1453 in).
MIVEC (MITSUBISHI INNOVATIVE VALVE TIMING ELECTRONIC CONTROL SYSTEM)
The MIVEC consists of the parts shown in the illus-
tration.
This system continuously varies and optimally con-
trols the opening and closing timing of the individual
intake and exhaust valves, in order to improve torque
and power output in all speed ranges.
AK502503
Identification
mark
Thickness
AD
AK503014
Exhaust V.V.T. sprocket
Section A-A
Section B-B
Engine oil control
valve filter
Intake V.V.T. sprocket
Cylinder head
Cylinder block
B
B
Engine oil
control valve
Cylinder head
Cylinder block
A
A
AE
Engine oil
control valve
BASE ENGINE
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ENGINE
11-15
V.V.T. SPROCKET (VARIABLE VALVE TIMING SPROCKET)
The engine oil control valve controls the hydraulic
pressure in order to move the vane rotor in the V.V.T.
sprocket to optimally control valve timing.
AK503061
Timing mark
Vane housing
Vane housing
Sprocket
Sprocket
Retard oil chamber
Retard oil chamber
Vane roter
Vane roter
Advance oil
chamber
Advance oil
chamber
Stopper pin
Stopper pin
V.V.T. sprocket
bolt
V.V.T. sprocket
bolt
Vane
bushing
Vane bushing
Spring
Intake V.V.T. sprocket
Exhaust V.V.T. sprocket
Timing mark
AD
BASE ENGINE
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ENGINE
11-16
CAMSHAFTS
The camshaft are hollow for weight reduction.
Each camshaft is provided with an oil passage to
guide the hydraulic pressure from the engine oil con-
trol valve to the V.V.T. sprocket.
A cam position sensing cam for detecting the cam
position (used by the cam position sensor) is inte-
grated at the back of each camshaft.
AK502506
Intake camshaft
Exhaust camshaft
Retard
oil channel
Retard
oil channel
Advance
oil channel
Advance
oil channel
Dowel pin
Hollow section
Sealing cap
Cam positon
sensing cam
AD
Item
Specifications
Overall length mm (in)
Intake
435.00 (17.126)
Exhaust
438.27 (17.255)
Journal outer diameter mm (in)
Intake
No.1
30 (1.2)
No.2
− 5
24 (0.9)
Exhaust
No.1
36 (1.4)
No.2
− 5
24 (0.9)
Camshaft lift mm (in)
Intake
9.3 (0.37)
Exhaust
8.2 (0.32)
BASE ENGINE
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ENGINE
11-17
ENGINE OIL CONTROL VALVE
The engine oil control valve consists of a solenoid
valve, which switches the hydraulic pressure that
acts on the vane rotor in the V.V.T. sprocket assem-
bly. This valve is actuated by a signal from the
engine ECU.
TIMING CHAIN CASE
The timing chain case is made of an aluminum alloy.
A front crankshaft oil seal is press-fit into the case.
AK302997AE
Spring guide
Valve sleeve
Plunger spring
Spool
O-ring
Insulation
coilar
Stator
Guide cap
Bracket
Yoke
Seal cap
Plunger
Shaft
Terminal
Bobbin
Tape
Enameled
copper wire
Drain
Drain
Pump
Pressure
chamber
Default
pressure
chamber
AK502507
Oil seal
AD
Timing chain case
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