Mitsubishi Lancer Evolution 7. Manual — part 172
ENGINE OVERHAUL -
Crankshaft and Cylinder Block
11B-65
INSTALLATION SERVICE POINTS
"
AA THRUST BEARING INSTALLATION
1. Install the thrust bearing onto the cylinder block side of
the No. 3 bearing section. The bearing can be installed
easily by applying engine oil.
2. Install the thrust bearing so that the side with the groove
faces the crankshaft weight side.
"
BA CRANKSHAFT BEARING INSTALLATION
1. Measure the diameter of the crankshaft journal, and
confirm the class shown below. When using a spare part,
each identification colour is painted at the position shown
in the illustration.
2. The cylinder block bearing section bore identification mark
is stamped at the position shown in the illustration.
Crankshaft journal
Cylinder
block
bearing
Spare
bearing
identifica
Class Product
identifica-
tion colour
Spare part
identifica-
tion colour
Journal
diameter
mm
bearing
section
bore iden-
tification
mark
identifica-
tion mark
1
None
Yellow
56.994 -
57 000
0
0
57.000
1
1
2
2
2
None
None
56.988 -
56 994
0
1
56.994
1
2
2
3
3
None
White
56.982 -
56 988
0
2
56.988
1
3
2
4
Groove
No. 2
No. 1
No. 4
No. 5
No. 3
Timing belt side
Cylinder block bearing section
bore identification mark
No. 1 No. 2
No. 3
No. 4
No. 5
Cylinder
bore size
mark
ENGINE OVERHAUL -
Crankshaft and Cylinder Block
11B-66
3. Select the bearing from the above table according to
the identification confirmed in steps 1 and 2.
[Example of selecting bearing]
(1) If the measured outer diameter of the crankshaft
journal is 57.000 mm, Class 1 applies, and the
identification colour is yellow.
(2) If the cylinder block bearing bore identification mark
is 0, select identification mark 0 in consideration of
step (1).
4. Install the grooved bearing on the cylinder block side.
5. Install the bearing with no oil groove onto the beam bearing
cap side.
"
CA BEAM BEARING CAP/BEARING CAP BOLT
INSTALLATION
1. Install the beam bearing cap with the arrow facing the
timing belt side.
2. Before installing the bearing cap bolt, confirm that the
bolt’s underhead length is less than the limit value.
Replace the bolt if it exceeds the limit value.
Limit value: 71.1 mm
3. Apply engine oil on the bolt threads and bolt surface.
4. Following the tightening order, tighten the bearing cap
bolt at 25 ± 2 N•m.
5. Make paint marks on the bolt head.
6. Using the position of the mark painted on the bolt head
as reference, make paint marks on the seat surface at
the 90_ to 100_ positions in the tightening direction.
7. Following the tightening order, tighten the bolt by 90_
to 100_, and confirm that the paint marks made on the
bolt and seat surface match.
Caution
(1) If the tightening angle is less than 90_, the
connection performance may not be attained, so
take special care when tightening.
(2) If the tightening angle exceeds 100_, completely
loosen the nut, and start again from step 1.
Crankshaft bearing side
identification mark position
Identification
mark
Groove
Upper bearing
Lower bearing
Underhead length
Arrow
8
4
1
5
9
7
3
2
6
10
Paint marks
Paint marks
90° - 100°
ENGINE OVERHAUL -
Crankshaft and Cylinder Block
11B-67
8. After installing the beam bearing cap, inspect the end
play of the crankshaft. If the end play exceeds the limit
value, replace the crankshaft bearing.
Standard value: 0.05 - 0.25 mm
Limit value: 0.4 mm
"
DA REAR OIL SEAL INSTALLATION
Press in the rear oil seal using the special tool.
"
EA REAR OIL SEAL CASE INSTALLATION
1. Apply form-in-place gasket onto the rear oil seal case
at the position shown in the illustration.
Form-in-place gasket
Specified gasket:
Mitsubishi Genuine Part No. MD970389 or
equivalent
Caution
Evenly squeeze out the form-in-place gasket so that
it is not insufficient or excessive.
2. Apply an appropriate amount of engine oil on the entire
periphery of the oil seal lip, and install on the cylinder
block.
MB990938
MD998776
ENGINE OVERHAUL -
Crankshaft and Cylinder Block
11B-68
INSPECTION
1. CRANKSHAFT OIL CLEARANCE (PLASTIC GAUGE
METHOD)
The oil clearance can be measured easily by using the
“plastic gauge”.
Use the following steps to use the “plastic gauge”.
(1) Wipe off all oil from the crankshaft’s outer diameter
and bearing’s inner diameter.
(2) Assemble the crankshaft.
(3) Set a plastic gauge as long as the bearing width
on the journal shaft so that straightly aligned with
the shaft centre.
(4) Carefully install the beam bearing cap, and tighten
the bolt at the specified torque 25 ± 2 N•m + 90_
to 100_.
(5) Remove the bolt, and carefully remove the beam
bearing cap.
(6) Measure the width of the crushed plastic gauge (at
the section crushed the most) with the scale printed
on the plastic gauge bag.
Standard value: 0.03 - 0.04 mm
Limit value: 0.1 mm
2. CYLINDER BLOCK
(1) Visually check for the presence of scratches, rusting,
or corrosion, and using flaw detection agent, etc.,
check for cracks. If any faults are found, repair or
replace the part.
(2) Using a straight edge and thickness gauge, measure
the flatness of the cylinder block’s upper surface.
Make sure that no gasket pieces, etc., are adhered
to the upper surface of the cylinder block when
measuring.
Standard value: 0.05 mm
Limit value: 0.1 mm
(3) Check for the presence of scratches or seizure on
the cylinder wall. If any faults are found, repair (over
size) or replace the part.
(4) Using a cylinder gauge, measure the inner diameter
and cylindricity of the cylinder. If greatly worn, repair
the cylinder to the over size, and replace the piston
ring.
Standard value: 85.0 mm
Cylindricity: 0.01 mm
Plastic gauge
12 mm
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