Mitsubishi Grandis. Manual — part 667

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-63

INSTALLATION SERVICE POINTS
>>A<< CRANKSHAFT THRUST BEARING
INSTALLATION

1. Install the two thrust bearings in the number 3

bearing bore in the cylinder block. For easier
installation, apply engine oil to the bearings; this
will help hold them in position.

2. The thrust bearings must be installed with their

groove side toward the crankshaft web.

>>B<< CRANKSHAFT BEARING
INSTALLATION

When bearing replacement is required, select and
install the correct bearing by the following procedure.

1. Measure the crankshaft journal diameter and

confirm its classification from the following table.
In the case of a crankshaft supplied as a service
part, identification marks of its journals are
stamped at the positions shown in the illustration.

2. The cylinder block bearing bore diameter

identification marks are stamped at the position
shown in the illustration from left to right,
beginning at No.1.

>>B<<

16.Crankshaft bearing (Lower)
17.Crankshaft

>>B<<

18.Crankshaft bearing (Upper)

>>A<<

19.Crankshaft thrust bearing
20.Cylinder block

Removal steps (Continued)

AK304599

Groove

AB

AK304413

Location of crankshaft journal
diameter marks

No. 3

No. 1

No. 2

No. 5

No. 4

AB

AK300198

Timing belt side

No. 1

No. 2 No. 3

No. 4

No. 5

AD

Cylinder bore
indentification
mark

Crankshaft journal outside diameter

Cylinder block
bearing bore

Crankshaft bearing Crankshaft bearing

for No.3

Identification mark Size mm

Identification mark Identification mark Identification mark

0

56.994

− 57.000

0

1

0

1

2

1

2

3

2

1

56.988

− 56.994

0

2

1

1

3

2

2

4

3

2

56.982

− 56.988

0

3

2

1

4

3

2

5

4

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-64

For example, if the crankshaft journal outside
diameter identification mark is "0" and cylinder block
bearing bore identification mark is "1," select a
bearing whose identification mark is "2" for number
1, 2, 4 and 5, and a bearing whose identification
mark is "1" for number 3.
If there is no identification mark on the crankshaft,
measure the journal outside diameter and select a
bearing appropriate for the measured value.

3. Install the bearings having an oil groove to the

cylinder block.

4. Install the bearings having no oil groove to the

bearing cap.

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

1. Install the bearing caps so that the arrow points to

the timing belt side.

2. Before installing the bearing cap bolts, check that

the shank length of each bolt meets the limit. If it
exceeds the limit, replace the bolt.

Limit: 71.1 mm

3. Apply engine oil to the threaded portion and

bearing surface of the bolt.

4. Tighten the bolts to the specified in the tightening

sequence shown.

Tightening torque: 25

± 2 N⋅m

5. Make a paint mark on the head of each bolt.
6. Make a paint mark on the bearing cap 90 degrees

from the paint mark made on the bolt in the
direction of tightening the bolt.

CAUTION

• If the bolt is overtightened, loosen the bolt

completely and then retighten it by repeating
the tightening procedure from step 4.

• If the bolt is turned less than 90 degrees,

proper fastening performance may not be
achieved. Be sure to turn the bolt exactly 90
degrees.

7. Turn each bolt 90 degrees in the tightening

sequence specified in step 4, and make sure that
the paint marks on the bolt and cap are aligned.

AK304598

Crankshaft bearing

Identification
mark position

AC

AK301466

Groove

For lower

For upper

AD

AK301471AD

Shank length

AK300199

1

5

9

10

6

2

AD

8

4

3

7

Arrow

AK300200

Paint mark

AD

Paint mark

90˚

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-65

8. Make sure that the crankshaft turns smoothly and

the end play is correct. If the end play exceeds the
limit, replace the number 3 crankshaft bearings.

Standard value: 0.05

− 0.25 mm

Limit: 0.40 mm

>>D<< OIL SEAL INSTALLATION

Use the special tools to press-fit the rear oil seal in
the rear oil seal case.

• Handle (MB990938)

• Crankshaft rear oil seal installer (MD998776)

>>E<< SEALANT APPLICATION TO OIL
SEAL CASE

1. Remove completely old FIPG remaining on the

rear oil seal case and cylinder block.

2. Apply a bead of FIPG to the surface of the rear oil

seal case as shown in the drawing.

Specified sealant:

Mitsubishi Genuine Part No.MD970389 or

equivalent

NOTE: Be sure to install the case quickly while the
sealant is wet (within 15 minutes).
3. Install the oil seal into the cylinder block after

applying an appropriate amount of engine oil to
the entire circumference of its lip portion.

4. Install the rear oil seal case by tightening its bolts

to 11

± 1 N⋅m.

NOTE: After installation, keep the sealed area away
from the oil for approximately one hour.

INSPECTION

M1113008800537

CRANKSHAFT JOURNAL OIL
CLEARANCE <PLASTIC GAUGING
MATERIAL METHOD>

1. Remove oil from the crankshaft journal and

crankshaft bearing.

2. Install the crankshaft.

3. Cut the plastic gauging material to the same

length as the width of bearing and place it on
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.

AK300201

AK300202

MB990938

MD998776

AD

AK300576AD

AK300203

Plastic gauging material

AD

AK300204

Plastic gauging material

AD

CRANKSHAFT AND CYLINDER BLOCK

ENGINE OVERHAUL

11B-66

6. Measure the width of the plastic gauging material

at its widest part by using a scale printed on the
plastic gauging material 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, replace or bore to oversize
and replace pistons and piston rings.

5. Using a cylinder gauge, measure the cylinder

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

Standard value:

Cylinder inner diameter 87.0 mm
Cylindrically 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

NOTE: Size mark is stamped on the piston top.

2. Measure the outside diameter (OD) of the piston

to be used. Measure it in thrust direction as
shown.

3. Based on the measured piston OD, calculate the

boring finish dimension.

Boring finish dimension = [Piston OD] +
[0.02 - 0.04 mm(clearance between piston OD
and cylinder)]

−[0.02 mm (honing margin)]

CAUTION

To prevent distortion that may result from
temperature rise during honing, bore cylinders,
working from number 2 to number 4 to number 1
to number 3.
4. Bore all cylinders to the calculated boring finish

dimension.

5. Hone to the final finish dimension (piston OD +

clearance between piston OD and cylinder).

6. Check the clearance between the piston and

cylinder.

Clearance between piston and cylinder:
0.02

− 0.04 mm

AK300205

A

B

C

D

E

F

G

AK300206

12mm

AD

A

B

Center

Bottom

Size

Identification mark

0.50 mm oversize
diameter

50

AK300577AC

Thrust
direction

Piston outside
diameter

AD