Mitsubishi Lancer Evolution VI. Manual - part 24

ENGINE  – 

Crankshaft and Flywheel

11-71

"

E

A

SEALANT APPLICATION TO OIL SEAL CASE

Specified sealant:

Mitsubishi Genuine Part No. MD970389 or equivalent

NOTE
(1) Be sure to install the case quickly while the sealant is

wet (within 15 minutes).

(2) After installation, keep the sealed area away from the

oil and coolant for approx. one hour.

INSPECTION

CRANKSHAFT OIL CLEARANCE (PLASTIGAGE
METHOD)

(1) Remove oil from the crankshaft journal and the crankshaft

bearing.

(2) Install the crankshaft.
(3) Cut the Plastigage to the same length as the width of

the bearing and place it on the journal in parallel with
its axis.

(4) Install the crankshaft bearing cap carefully and tighten

the bolts to the specified torque.

(5) Carefully remove the crankshaft bearing cap.
(6) Measure the width of the Plastigage at its widest part

by using a scale printed on the Plastigage package.

Standard value: 0.02 – 0.04 mm

Limit: 0.1 mm

CYLINDER BLOCK

(1) Visually check for scratches, rust, and corrosion.

Use also a flaw detecting agent for the check. If defects
are evident, correct, or replace.

(2) Using a straightedge and feeler gauge, check the block

top surface for warpage. Make sure that the surface is
free from gasket chips and other foreign matter.

Standard value: 0.05 mm

Limit: 0.1 mm

(3) If the distortion is excessive, correct within the allowable

limit or replace.

Grinding limit: 0.2 mm

Includes/combined with cylinder head grinding

Cylinder block height (when new): 284 mm

(4) Check cylinder walls for scratches and seizure. If defects

are evident, correct (bored to oversize) or replace.

Plastigage

Plastigage

ENGINE  – 

Crankshaft and Flywheel

11-72

(5) Using cylinder gauge, measure the cylinder bore and

cylindricity. If worn badly, correct cylinder to an oversize
and replace piston and piston rings. Measure at the points
shown in illustration.

Standard value: 

Cylinder I.D. 85.00 – 85.03 mm
Cylindricity 0.01 mm or less

BORING CYLINDER

(1) Oversize pistons to be used should be determined on

the basis of the largest bore cylinder.

Piston size identification

Size

Identification mark

0.50  O.S.

50

1.00  O.S.

100

NOTE
Size mark is stamped on the piston top.

(2) Measure outside diameter of piston to be used. Measure

it in thrust direction as shown.

(3) Based on the measured piston O.D. calculate boring finish

dimension.

Boring finish dimension = Piston O.D. + (clearance

between piston O.D. and cylinder) – 0.02 mm
(honing margin)

(4) Bore all cylinders to the calculated boring finish dimension.

Caution
To prevent distortion that may result from temperature
rise during honing, bore cylinders, working from No.
2, No. 4, No. 1 to No. 3.

(5) Hone to final finish dimension (piston O.D. + clearance

between piston O.D. and cylinder).

(6) Check clearance between piston and cylinder.

Clearance between piston and cylinder:

0.02  – 0.04 mm

NOTE
When boring cylinders, finish all of four cylinders to  same
oversize. Do not bore only one cylinder to an oversize.

ENGINE  – 

Throttle Body

11-73

THROTTLE BODY

DISASSEMBLY AND REASSEMBLY

1

2

3

4

5

6

7

3.5 Nm

3.5 Nm

Disassembly steps

A

A

" "

A

A

1. Throttle position sensor (with built-

in closed throttle position switch)

2. Idle speed control body assembly
3. O-ring

A

B

"

4. Throttle body
5. Fixed SAS
6. Speed adjusting screw
8. O-ring

NOTE
1.

The fixed SAS and the speed adjusting screw are
correctly adjusted at the factory and should not be
removed.

2.

If the fixed SAS should happen to have been
removed, carry out fixed SAS adjustment.

3.

If the speed adjusting screw should happen to have
been removed, carry out speed adjusting screw
adjustment.

ENGINE  – 

Throttle Body

11-74

DISASSEMBLY SERVICE POINTS

A

A

"

THROTTLE POSITION SENSOR AND IDLE AIR
CONTROL MOTOR REMOVAL

(1) Do not disassemble the sensor and motor.
(2) Do not immerse solvent to clean the sensor and motor.

Clean then with shop towel.

A

B

"

THROTTLE BODY REMOVAL

(1) Do not remove the throttle body.
(2) Check if the vacuum port or passage is clogged. Use

compressed air to clean the vacuum passage.

REASSEMBLY SERVICE POINT

"

A

A

THROTTLE POSITION SENSOR INSTALLATION

(1) Install the throttle position sensor to the throttle body

as shown in the diagram.

(2) Turn throttle position sensor 90

°

 clockwise to set it, and

tighten screws.

(3) Check the continuity between terminal No. 3 (Idle throttle

position switch) and No. 4 (Earth).

Throttle valve condition

Continuity

Fully closed

Conductive

Fully open

No conductive

If there is no continuity with the throttle valve fully closed,
turn the throttle position sensor counterclockwise, and
then check again.

Throttle position sensor

Earth

TPS power supply

TPS output

Idle position switch