Mitsubishi Lancer Evolution VI. Manual - part 20

ENGINE  – 

Front Case, Counterbalance Shaft and Oil Pan

11-55

"

G

A

OIL PUMP DRIVEN GEAR / OIL PUMP DRIVE
GEAR INSTALLATION

Apply engine oil amply to the gears and line up the alignment
marks.

"

H

A

FRONT CASE ASSEMBLY INSTALLATION

(1) Set the special tool on the front end of crankshaft and

apply a thin coat of engine oil to the outer circumference
of the special tool to install the front case.

(2) Install the front case assembly through a new front case

gasket and temporarily tighten the flange bolts (other
than those for tightening the filter bracket).

"

I

A

SEALANT APPLICATION TO OIL PRESSURE
SWITCH

Coat the threads of switch with sealant and install the switch
using the special tool.

Specified sealant: 3M

TM

 AAD Part No. 8672 or equivalent

Caution
(1) Keep the end of the thread portion clear or sealant.
(2) Avoid an overtightening.

"

J

A

FLANGE BOLT INSTALLATION

(1) Insert a Phillips screwdriver into a hole in the left side

of the cylinder block to lock the silent shaft.

6EN0564

ENGINE  – 

Front Case, Counterbalance Shaft and Oil Pan

11-56

(2) Secure the oil pump driven gear onto the left

counterbalance  shaft by tightening the flange bolt to
specified torque.

"

K

A

PLUG INSTALLATION

(1) Install a new O-ring to the groove of the front case.
(2) Install the plug to the front case.
(3) Fit the special tool MD998162 on the plug, and then

hold it in position with special tool MD998783.

(4) Tighten the plug to the specified torque.
(5) Remove the special tools MD998783 and MD998162.

"

L

A

OIL PAN INSTALLATION

(1) Clean both mating surfaces of oil pan and cylinder block.
(2) Apply a 4 mm wide bead of sealant to the entire

circumference of the oil pan flange.

Specified sealant:

Mitsubishi Genuine Part No. MD970389 or
equivalent

NOTE
1.

Be sure to install the oil pan 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.

(3) Note the difference in bolt lengths at the location shown.

MD998162

MD998783

6EN0213

Bolt hole
portion

Groove
portion

ENGINE  – 

Front Case, Counterbalance Shaft and Oil Pan

11-57

"

M

A

OIL FILTER INSTALLATION

(1) Clean the installation surfaces of the filter bracket.
(2) Apply engine oil to the O-ring of the oil filter.
(3) Screw the oil filter in until the O-ring contacts the bracket.

Then tighten 3/4 turn (tightening torque: 16 Nm).

"

N

A

DRAIN PLUG GASKET INSTALLATION

Caution
Fitting the gasket in a wrong way will result in oil leakage.

Install the drain plug gasket in the direction shown.

INSPECTION

FRONT CASE

(1) Check oil holes for clogging and clean if necessary.
(2) Check the left counterbalance shaft front bearing section

for wear, damage and seizure. If there is anything wrong
with the section, replace the front case.

(3) Check the front case for cracks and other damage.

Replace cracked or damaged front case.

OIL SEAL

(1) Check the oil seal lip for wear and damage. Replace

oil seal if necessary.

(2) Check the oil seal lip for deterioration. Replace oil seal

if necessary.

6EN0591

Bracket side

Oil pan
side

Drain plug

Gasket

Oil pan

ENGINE  – 

Front Case, Counterbalance Shaft and Oil Pan

11-58

COUNTERBALANCE SHAFT

(1) Check oil holes for clogging.
(2) Check journals for seizure, damage and contact with

bearing. If there is anything wrong with the journal, replace
the counterbalance shaft, bearing or front case assembly.

OIL COOLER BY-PASS VALVE (ENGINE WITH AIR
COOLING TYPE OIL COOLER)

(1) Make sure that the valve moves smoothly.
(2) Ensure that the dimension (L) measures the standard

valve under normal temperature and humidity.

Standard value (L): 34.5 mm

(3) The dimension must be the standard value when

measured after the valve has been dipped in 100

°

C oil.

Standard value (L): 40 mm or more

OIL PUMP

(1) Assemble the oil pump gear to the front case and rotate

it to ensure smooth rotation with no looseness.

(2) Ensure that there is no ridge wear on the contact surface

between the front case and the gear surface of the oil
pump cover.

(3) Check the side clearance.

Standard value:

Drive gear

0.08 – 0.14 mm

Driven gear

0.06 – 0.12 mm

Valve