Mitsubishi 380. Manual - part 453

 

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Mitsubishi 380. Manual - part 453

 

 

OIL PAN AND OIL PUMP

ENGINE OVERHAUL <3.8L ENGINE>

11B-38

Required Special Tool

• MD998054: Oil Pressure Switch Socket Wrench

• MD998717: Crankshaft Front Oil Seal Installer

REMOVAL SERVICE POINT

.

<<A>> OIL PAN, LOWER REMOVAL

1. Remove the lower oil pan mounting bolts.

CAUTION

Do not use a scraper or special tool to remove the oil pan.
2. Remove the lower oil pan by tapping on its side with a 

plastic hammer (mallet) through a wooden plank held 
against it.

.

<<B>> OIL PAN, UPPER REMOVAL

1. Remove the long bolts "A" shown in the illustration first.

2. Remove all other bolts.

CAUTION

Do not use a scraper or special tool to remove the oil pan.
3. Remove the oil pan.

4. Screw M10 bolts into the two bolt holes in the oil pan to 

break the joint and remove the oil pan.

.

REMOVAL STEPS

1.

DRAIN PLUG

>>H<<

2.

DRAIN PLUG GASKET

<<A>> >>G<<

3.

OIL PAN, LOWER

4.

COVER

<<B>> >>F<<

5.

OIL PAN, UPPER

6.

OIL SCREEN

7.

OIL SCREEN GASKET

8.

BAFFLE PLATE

>>E<<

9.

ENGINE OIL PRESSURE SWITCH

10. OIL FILTER COVER

>>D<<

11. OIL FILTER
12. OIL FILTER BRACKET

13. OIL FILTER BRACKET GASKET
14. RELIEF PLUG
15. RELIEF SPRING
16. RELIEF PLUNGER

>>C<<

17. CRANKSHAFT FRONT OIL SEAL

>>B<<

18. OIL PUMP CASE ASSEMBLY
19. O-RING
20. OIL PUMP COVER

<<C>> >>A<<

21 OIL PUMP OUTER ROTOR

<<C>> >>A<<

22. OIL PUMP INNER ROTOR
23. OIL PUMP CASE

REMOVAL STEPS (Continued)

AK304454

"A"

AB

AKX00658

OIL PAN AND OIL PUMP

ENGINE OVERHAUL <3.8L ENGINE>

11B-39

<<C>> OUTER ROTOR/INNER ROTOR REMOVAL

Make alignment dots on the outer and inner rotors for ease of 
reassembly.

INSTALLATION SERVICE POINTS

.

>>A<< INNER ROTOR/OUTER ROTOR INSTALLA-
TION

Apply engine oil to the rotors. Then install the rotors, ensuring 
that the alignment dots made at disassembly are properly 
aligned.

.

>>B<< OIL PUMP CASE ASSEMBLY 
INSTALLATION

1. Clean the gasket mating surfaces of oil pump case and 

cylinder block.

2. Apply a 3 mm (0.1 inch) diameter bead of sealant 

(Mitsubishi Genuine Parts number MD970389 or equivalent) 
to the oil pump case.
Apply sealant as indicated by the broken line in the 
illustration; the grooves must be traced and the bolt holes 
must be surrounded with a bead of sealant.

3. Install the oil pump case assembly to the front of the cylinder 

block.

NOTE: Be sure to install the oil pump case quickly while the 
sealant is wet (within 15 minutes).

4. Tighten the oil pump case mounting bolts to the specified 

torque.

Tightening torque: 14 

± 1 N⋅m (122 ± 9 in-lb)

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

.

AKX00742AB

ALIGNMENT DOTS

AKX00742AB

ALIGNMENT DOTS

AKX00674

BOLT HOLE

GROOVE

AB

OIL PAN AND OIL PUMP

ENGINE OVERHAUL <3.8L ENGINE>

11B-40

>>C<< CRANKSHAFT FRONT OIL SEAL 
INSTALLATION 

1. Install the guide of special tool MD998717 to the front end of 

the crankshaft.

2. Apply engine oil to the lip area of a new oil seal and push it 

in until it contacts the oil pump case.

3. Using special tool MD998717, press-fit the oil seal into the 

oil pump case.

.

>>D<< OIL FILTER INSTALLATION

1. Clean the installation surface of the filter bracket.

2. Apply engine oil to the O-ring of the oil filter.

3. Install the oil filter to the bracket and tighten it to the 

specified torque.

Tightening torque: 14 

± 2 N⋅m (122 ± 17 in-lb)

4. If no torque wrench can be used for tightening, use the 

following procedure.

(1) Screw in the oil filter until its O-ring contacts the oil filter 

bracket.

(2) Tighten the oil filter 1 turn.

.

>>E<< ENGINE OIL PRESSURE SWITCH 
INSTALLATION

CAUTION

Be careful not to block the oil passage with sealant.
1. Apply 3M

™ AAD Part number 8672 or equivalent to the 

thread of engine oil pressure switch.

AKX00659AB

MD998717 (GUIDE)

OIL SEAL

AKX00660

MD998717

AB

AKX00692

BRACKET 

SIDE

AB

AKX00688

OIL PAN AND OIL PUMP

ENGINE OVERHAUL <3.8L ENGINE>

11B-41

2. Tighten the engine oil pressure switch together with the oil 

filter bracket to the specified torque, using special tool 
MD998054.

Tightening torque: 10 

± 2 N⋅m (87 ± 17 in-lb)

.

>>F<< OIL PAN, UPPER INSTALLATION

1. Clean both gasket surfaces of the upper oil pan and cylinder 

block.

2. Apply a 4 mm (0.2 inch) diameter bead of sealant 

(Mitsubishi Genuine Parts number MD970389 or equivalent) 
to the upper oil pan.
Apply sealant as indicated by the broken line in the 
illustration; the grooves must be traced and the bolt holes 
must be surrounded with a bead of sealant.

CAUTION

When installing the upper oil pan, be sure not to expel the 
sealant from the oil pan flange at portion A in the illustra-
tion.
3. Install the oil pan to the bottom of the cylinder block.

NOTE: Be sure to install the oil pan quickly while the sealant 
is wet (within 15 minutes).

4. Tighten the upper oil pan bolts in the sequence shown.

Tightening torque: 9.0 

± 3.0 N⋅m (80 ± 26 in-lb)

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

.

AK204037AB

MD998054

AK304451

GROOVE

BOLT HOLE

A

AB

AK304450

9

1

4

5

8

12

17

16

11 7

3

2

10 15

14

13

AB

6

 

 

 

 

 

 

 

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