Mitsubishi Lancer Evolution IX. Manual — part 93

PISTON AND CONNECTING ROD

ENGINE OVERHAUL

11B-63

CRANKSHAFT PIN OIL CLEARANCE
(PLASTIGAGE METHOD)

1. Wipe off oil from the crankshaft pin and

connecting rod bearing.

2. Cut a piece of plastigage whose length is

equivalent to the width of the bearing and place it
on the crankshaft pin in parallel with its axis.

3. Install the connecting rod cap carefully and tighten

the nuts to the specified torque 20

± 2 N⋅m + 90°

to 94

°.

4. Remove the nuts, then remove the connecting rod

cap carefully.

5. Measure the largest width of the crushed

plastigage using the ruler printed on the bag of the
plastigage.

Standard value: 0.02

− 0.04 mm

Limit: 0.1 mm

AK202848

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-64

CRANKSHAFT AND CYLINDER BLOCK

REMOVAL AND INSTALLATION

M1113008700693

AK203816 AC

32 ± 2 N·m

6

3

14

15

11

13

8

12

5

9

4

10

1

7

2

25 ± 2 N·m +90˚

11 ± 1 N·m

9.0 ± 1.0 N·m

132 ± 5 N·m

11 ± 1 N·m

Apply engine oil to
all moving parts
before installation.

Removal steps

1. Flywheel bolt
2. Flywheel
3. Rear plate
4. Bell housing cover

>>

E

<< 5. Oil seal case

>>

D

<< 6. Oil seal

>>

C

<< 7. Bearing cap bolt

>>

C

<< 8. Beam bearing cap

>>

B

<< 9. Crankshaft bearing, lower

10. Crankshaft

>>

B

<< 11. Crankshaft bearing, upper

>>

A

<< 12. Thrust bearing

13. Check valve
14. Oil jet
15. Cylinder block

Removal steps (Continued)

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-65

INSTALLATION SERVICE POINTS
>>A<< THRUST BEARING INSTALLATION

Install the two thrust bearings in the No. 3 bearing
bore in the cylinder block. Each thrust bearing must
be installed with the grooved end toward the crank-
shaft web.
NOTE: Applying engine oil to the bearings will help
facilitate holding them in position.

>>B<< CRANKSHAFT BEARING
INSTALLATION

1. Location of crankshaft journal diameter marks

<Bearing selection example>
If the crankshaft journal diameter mark is “0” and
the cylinder block bearing bore mark is “1,” then
select a bearing with a “2” mark as the No. 1, 2, 4
or 5 bearing and a bearing with a “1” mark as the
No. 3 bearing.
If the crankshaft journal diameter mark is illegible,
measure the journal diameter and select a
bearing with the mark corresponding to the
measurement.

2. The diameter identification marks of the bearing

bores in the cylinder block are stamped in the
location shown in the drawing.

AK202769

Groove

AB

AK202908

Location of crankshaft journal
diameter marks

No. 3

No. 1

No. 2

No. 5

No. 4

AB

AK304518AB

No. 1 No. 2

No. 3

No. 4

No. 5

Cylinder
bore size
mark

Timing belt side

Diameter identification marks of
bearing bores in cylinder block

Crankshaft journal diameter

Cylinder block bearing
bore

Crankshaft bearing

Identification mark

Journal diameter
measurement mm

Identification mark

Identification mark

0

56.994

− 57.000

0

0

1

1

2

2

1

56.988

− 56.994

0

1

1

2

2

3

2

56.982

− 56.988

0

2

1

3

2

4

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-66

3. The size mark of each crankshaft bearing is

indicated by ink in the location shown in the
drawing.

4. Install bearing halves with oil grooves in the

cylinder block bearing bores.

5. Install bearing halves with no oil grooves in the

beam bearing cap.

>>C<< BEAM BEARING CAP/BEARING
CAP BOLT INSTALLATION

1. Install the beam bearing cap on the cylinder block

with the arrow pointing to the timing belt.

2. Measure the shank length of each bearing cap

bolt before installation. If the measurement
exceeds the limit, replace the bolt.

Limit: 71.1 mm

3. Apply engine oil to the threads and bearing

surface of the bolt.

4. Tighten the bolts to 25

± 2 N⋅m in the indicated

sequence.

5. Make a paint mark on the head of the bolt.
6. Make a paint mark on the bearing cap at a point

90 to 100

° away from the paint mark made on the

bolt head in the tightening direction.

CAUTION

• If the tightening angle is less than 90°, ade-

quate tightness could not be assured.

• If the tightening angle exceeds 100°, loosen

the bolt completely and then perform the

tightening again beginning with the first step.

7. Turn clockwise the bolts 90

° to 100° in the

indicated tightening sequence to bring the mark
on each bolt head into alignment with that on the
bearing cap.

8. After installing the beam bearing cap, measure

the end play of the crankshaft. If the end play
exceeds the limit, replace the crankshaft bearings.

Standard value: 0.05

− 0.25 mm

Limit: 0.4 mm

AK304464AC

Identification mark

Crankshaft bearing identification mark location

AK301466

Groove

For lower

For upper

AD

AK301471AD

Shank length

AK202737

8

4

1

5

9

7

3

2

6

10

Arrow

AB

AK202722

Paint mark

Paint mark

AB

90˚ to 100˚

AK202823