Mitsubishi Grandis. Manual — part 631

11A-1

GROUP 11A

ENGINE

MECHANICAL

CONTENTS

GENERAL INFORMATION . . . . . . . .

11A-2

SERVICE SPECIFICATIONS. . . . . . .

11A-2

SEALANTS . . . . . . . . . . . . . . . . . . . .

11A-3

SPECIAL TOOLS. . . . . . . . . . . . . . . .

11A-4

ON-VEHICLE SERVICE. . . . . . . . . . .

11A-7

DRIVE BELT TENSION CHECK. . . . . . . . .

11A-7

AUTO-TENSIONER CHECK . . . . . . . . . . .

11A-8

VALVE CLEARANCE CHECK AND ADJUSTMENT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11A-9

ROCKER ARM PISTON OPERATION CHECK

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11A-10

IGNITION TIMING CHECK . . . . . . . . . . . . .

11A-11

IDLE SPEED CHECK . . . . . . . . . . . . . . . .

11A-12

IDLE MIXTURE CHECK . . . . . . . . . . . . . . .

11A-12

COMPRESSION PRESSURE CHECK. . . .

11A-13

MANIFOLD VACUUM CHECK . . . . . . . . . .

11A-14

CRANKSHAFT PULLEY . . . . . . . . . .

11A-15

REMOVAL AND INSTALLATION . . . . . . . .

11A-15

CAMSHAFT AND VALVE STEM SEAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11A-16

REMOVAL AND INSTALLATION . . . . . . . .

11A-16

OIL PAN . . . . . . . . . . . . . . . . . . . . . . .

11A-21

REMOVAL AND INSTALLATION . . . . . . . .

11A-21

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

11A-23

CRANKSHAFT OIL SEAL . . . . . . . . .

11A-23

REMOVAL AND INSTALLATION . . . . . . . .

11A-23

CYLINDER HEAD GASKET . . . . . . . .

11A-27

REMOVAL AND INSTALLATION . . . . . . . .

11A-27

TIMING BELT . . . . . . . . . . . . . . . . . . .

11A-33

REMOVAL AND INSTALLATION . . . . . . . .

11A-33

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

11A-42

ENGINE ASSEMBLY . . . . . . . . . . . . .

11A-43

REMOVAL AND INSTALLATION . . . . . . . .

11A-43

GENERAL INFORMATION

ENGINE MECHANICAL

11A-2

GENERAL INFORMATION

M1111000100572

SERVICE SPECIFICATIONS

M1112000300320

Item

Specification

Total displacement mL

2,378

Bore

× Stroke mm

87

× 100

Compression ratio

9.5

Compression chamber

Pentroof

Camshaft arrangement

SOHC

Number of valve

Intake

8

Exhaust

8

Valve timing

Intake valve

Open (BTDC)

0

° <low speed cam A>

2

° <low speed cam B>

20

° <High speed cam>

Closes (ABDC)

46

° <low speed cam A>

48

° <low speed cam B>

72

° <High speed cam>

Exhaust valve

Open (BTDC)

54

°

Closes (ABDC)

21

°

Fuel system

Electronically controlled multipoint fuel injection

Rocker arm

Roller type

Item

Standard value

Limit

Drive belt tension

Vibration frequency Hz (Reference)

109

− 145

−

Tension N (Reference)

331

− 577

−

Valve clearance (at hot) mm

Intake valve

0.20

−

Exhaust valve

0.30

−

Basic ignition timing

5

° BTDC ± 3°

−

Ignition timing

Approximately
10

° BTDC

−

Idle speed r/min

700

± 100

−

CO contents %

0.5 or less

−

HC contents ppm

100 or less

−

Compression pressure kPa-r/min

1,560

− 200

1,130

− 200

Compression pressure difference of all cylinders kPa

−

Maximum 98

Intake manifold vacuum kPa

−

Minimum 60

Cylinder head bolt nominal length mm

−

99.4

Balancer timing belt tension (When adjusted) Deflection mm

5

− 7

−

SEALANTS

ENGINE MECHANICAL

11A-3

SEALANTS

M1112000500346

Balancer timing belt tension (When replaced) Deflection mm

5

− 7

−

Balancer timing belt tension (When checked) Deflection mm

5

− 10

−

Timing belt tensioner adjuster rod protrusion amount mm

3.8

− 4.5

−

Timing belt tensioner adjuster rod movement mm

Within 1

−

Item

Standard value

Limit

Item

Specified sealant

Remark

Camshaft position sensor support

MITSUBISHI GENUINE PART MD970389 or
equivalent

Semi-drying
sealant

Engine oil pan
Taper plug

LOCTITE203MP or equivalent

Anaerobic
sealant

SPECIAL TOOLS

ENGINE MECHANICAL

11A-4

SPECIAL TOOLS

M1112000600406

Tool

Number

Name

Use

MB991955

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

MUT-III sub assembly

A: Vehicle communication

interface (V.C.I.)

B: MUT-III USB cable
C: MUT-III main harness A

(Vehicles with CAN
communication system)

D: MUT-III main harness B

(Vehicles without CAN
communication system)

E: MUT-III measurement

adapter

F: MUT-III trigger harness

• Drive belt tension check

• Checking the ignition timing

• Checking the idle speed

• Erasing the diagnosis code

CAUTION

For vehicles with CAN
communication, use MUT-III
main harness A to send
simulated vehicle speed. If
you connect MUT-III main
harness B instead, the CAN
communication does not
function correctly.

MB991668

Belt tension meter set

Drive belt tension check (used
together with MUT-III)

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USED

B991668