Mitsubishi Galant. Manual — part 71

CYLINDER HEAD AND VALVES

TSB Revision

ENGINE OVERHAUL <3.0L>

11D-33

VALVE SEAT
Assemble the valve, then measure the valve stem projection
between the end of the valve stem and the spring seating
surface. If the measurement exceeds the specified limit,
replace the valve seat.

Standard value: 49.30 mm (1.941 inches)
Limit: 49.80 mm (1.960 inches)

VALVE SEAT RECONDITIONING PROCEDURE

1. Before correcting the valve seat, check for the clearance

between the valve guide and valve and, if necessary,
replace the valve guide.

2. Using the special tool or a seat grinder, correct to obtain the

specified seat width and angle.

3. After correcting the valve seat, lap the valve and valve seat

using lapping compound. Then, check the valve stem
projection.

VALVE SEAT REPLACEMENT PROCEDURE

1. Cut the valve seat from the inside to thin the wall thickness.

Then, remove the valve seat.

2. Rebore the valve seat hole in the cylinder head to a selected

oversize valve seat diameter.

Seat ring hole diameter:

Intake valve

0.3 OS 34.30

−−−−

34.33 mm (1.3504

−−−−

1.3516 inches)

0.6 OS 34.60

−−−−

34.63 mm (1.3622

−−−−

1.3634 inches)

Exhaust valve

0.3 OS 31.80

−−−−

31.83 mm (1.2520

−−−−

1.2531 inches)

0.6 OS 32.10

−−−−

32.13 mm (1.2638

−−−−

1.2650 inches)

3. Before fitting the valve seat, either heat the cylinder head up

to approximately 250

°

C (482

°

F) or cool the valve seat in

liquid nitrogen, to prevent the cylinder head bore from
galling.

4. Using a valve seat cutter, correct the valve seat to the

specified width and angle.

AKX00695

SPRING SEATING
SURFACE

VALVE STEM END

VALVE STEM
PROJECTION

AB

AKX00717

0.9 - 1.3 mm
(0.04 - 0.05 in)

65˚

45˚

30˚

AB

AKX00610

0.5 - 1 mm
(0.020 - 0.039 in)

0.5 - 1 mm (0.020 - 0.039 in)

CUT
AWAY

AB

AKX00611

HEIGHT OF
SEAT RING

OVERSIZE ID

AB

CYLINDER HEAD AND VALVES

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ENGINE OVERHAUL <3.0L>

11D-34

See "VALVE SEAT RECONDITIONING PROCEDURE" on
the previous page.

VALVE GUIDE REPLACEMENT PROCEDURE

1. Remove the snap ring from the exhaust valve guide.

2. Using a press, remove the valve guide toward the cylinder

block.

CAUTION

Do not install a valve guide of the same size again.
3. Rebore the valve guide hole of the cylinder head so that it

fits the press-fitted oversize valve guide.

Valve guide hole diameter:

0.05 OS 11.05

−−−−

11.07 mm (0.4350

−−−−

0.4358 inch)

0.25 OS 11.25

−−−−

11.27 mm (0.4429

−−−−

0.4457 inch)

0.50 OS 11.50

−−−−

11.52 mm (0.4528

−−−−

0.4535 inch)

4. Install the new snap ring into groove of the exhaust valve

guide.

NOTE: The inlet valve guide has no snap ring groove.

5. Press-fit the valve guide until it protrudes 14 mm (0.6 inch)

from the cylinder head top surface as shown in the
illustration.

NOTE: When press-fitting the valve guide, work from the
cylinder head top surface.

NOTE: After installing the valve guides, insert new valves in
them to check for smooth operation.

AKX00712

REMOVAL

INSTALLATION

PRESS

PRESS

PUSHROD

VALVE
GUIDE

VALVE
GUIDE

AB

AKX00727

14 mm
(0.6 in)

AB

OIL PAN AND OIL PUMP

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ENGINE OVERHAUL <3.0L>

11D-35

O IL PA N AN D O IL PU M P

REMOVAL AND INSTALLATION

M1113008100099

Required Special Tool:
MD998717: Crankshaft Front Oil Seal Installer

AKX00682

10 N·m
87 in-lb

14 N·m
122 in-lb
(M8 bolt)

8.8 N·m
78 in-lb

19 N·m
14 ft-lb

14 N·m
122 in-lb

24 N·m
17 ft-lb

11 N·m
95 in-lb

10 N·m
87 in-lb

41 N·m
30 ft-lb
(M10 bolt)

5.9 N·m
52 in-lb

44 N·m
33 ft-lb

11 N·m
95 in-lb

5.9 N·m
52 in-lb

39 N·m
29 ft-lb

11 N·m
95 in-lb

18

20

4

21

3

22

13

12

11

17

14

10

9

8

6

5

7

N

N

N

N

N

AC

APPLY ENGINE OIL TO
ALL MOVING PARTS
BEFORE INSTALLATION.

2

1

23

19

16

15

REMOVAL STEPS

>>H<<

1. OIL PRESSURE SWITCH

>>G<<

2. OIL FILTER
3 OIL FILTER BRACKET
4. OIL FILTER BRACKET GASKET
5. DRAIN PLUG

>>F<<

6. DRAIN PLUG GASKET

<<A>>

>>E<<

7. OIL PAN, LOWER
8. COVER

<<B>>

>>D<<

9. OIL PAN, UPPER
10.BAFFLE PLATE
11. OIL SCREEN
12.OIL SCREEN GASKET

13.BAFFLE PLATE
14.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)

OIL PAN AND OIL PUMP

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ENGINE OVERHAUL <3.0L>

11D-36

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

break the joint and remove the oil pan.

<<C>>OUTER ROTOR/INNER ROTOR REMOVAL
Make alignment dots on the outer and inner rotors for
assembly.

AKX00746

TIMING BELT SIDE

"A"

AB

AKX00658

AKX00742AB

ALIGNMENT DOTS