Mitsubishi Colt Ralliart. Manual - part 1

GROUP 11A

ENGINE 

MECHANICAL 

<4A9>

CONTENTS

GENERAL INFORMATION . . . . . . . .

11A-2

SERVICE SPECIFICATIONS. . . . . . .

11A-3

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

11A-3

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

11A-4

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

11A-6

DRIVE BELT TENSION CHECK AND 

 

ADJUSTMENT  . . . . . . . . . . . . . . . . . . . . . . 

11A-6

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

11A-9

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

11A-9

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

11A-10

VALVE CLEARANCE CHECK AND 

 

ADJUSTMENT  . . . . . . . . . . . . . . . . . . . . . . 

11A-10

COMPRESSION PRESSURE CHECK. . . . 

11A-12

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

11A-13

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

11A-14

REMOVAL AND INSTALLATION  . . . . . . . . 

11A-14

CAMSHAFT  . . . . . . . . . . . . . . . . . . . .

11A-17

REMOVAL AND INSTALLATION  . . . . . . . . 

11A-17

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

11A-24

REMOVAL AND INSTALLATION  . . . . . . . . 

11A-24

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

11A-26

REMOVAL AND INSTALLATION  . . . . . . . . 

11A-26

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

11A-29

REMOVAL AND INSTALLATION <M/T>  . . 

11A-29

REMOVAL AND INSTALLATION <CVT> . . 

11A-36

GENERAL INFORMATION

ENGINE MECHANICAL <4A9>

11A-2

GENERAL INFORMATION

M1111000100992

Item

4A91

Total displacement mL

1,499

Bore 

× Stroke mm

75.0 

× 84.8

Compression ratio

10.0

Compression chamber

Pentroof

Camshaft arrangement

DOHC

Number of valve

Intake

8

Exhaust

8

Valve timing

Intake opening

BTDC 31

° − ATDC 19°

Intake closing

ABDC 21

° − ABDC 71°

Exhaust opening

BBDC 39

°

Exhaust closing

ATDC 5

°

Fuel system

Electronically controlled multipoint fuel injection

Rocker arm

Not equipped

Auto-lash adjuster

Not equipped

SERVICE SPECIFICATIONS

ENGINE MECHANICAL <4A9>

11A-3

SERVICE SPECIFICATIONS

M1112000300676

Item

Standard value

Limit

Alternator and A/C drive belt tension (When 
checked)

Vibration frequency Hz

202 

− 247

−

Tension N

392 

− 588

−

Deflection mm (Reference)

6.8 

− 9.0

−

Alternator and A/C drive belt tension (When 
adjusted)

Vibration frequency Hz

214 

− 237

−

Tension N

441 

− 539

−

Deflection mm (Reference)

7.3 

− 8.3

−

Alternator and A/C drive belt tension (When 
replaced)

Vibration frequency Hz

286 

− 319

−

Tension N

784 

− 980

−

Deflection mm (Reference)

4.4 

− 5.4

−

Basic ignition timing

5

° BTDC ± 3°

−

Ignition timing

Approximately 
10

° BTDC

−

Idle speed r/min

700 

± 50

−

CO contents %

0.1 or less

−

HC contents ppm

100 or less

−

Valve clearance (at cold) mm

Intake valve

0.22 

± 0.04

−

Exhaust valve

0.30 

± 0.04

−

Compression pressure (at engine speed of 300 r/min) kPa

1,200

Minimum 
850

Compression pressure difference of all cylinders kPa

−

Maximum 98

Intake manifold vacuum kPa

−

Minimum 60

SEALANTS

M1112000500766

Item

Specified Sealant

Remark

Timing chain tensioner cover

LOCTITE 5971 or exact equivalent

Semi-drying sealant

Cylinder head cover assembly
Engine oil pan
Crankshaft rear oil seal case assembly
Flywheel bolt <M/T>

LOCTITE 2701 or equivalent

Drive plate bolt <CVT>

SPECIAL TOOLS

ENGINE MECHANICAL <4A9>

11A-4

SPECIAL TOOLS

M1112000601164

Tool

Number

Name

Use

B992080

A

B

MB992080
A: MB992081
B: MB992082

Belt tension meter set
A: Belt tension meter
B: Microphone assembly

Drive belt tension check

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USE

MB991955

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

M.U.T.-III sub assembly

A: Vehicle communication 

interface (V. C. I.)

B: M.U.T.-III USB cable
C: M.U.T.-III main harness 

A (Vehicles with CAN 
communication system)

D: M.U.T.-III main harness 

B (Vehicles without CAN 
communication system)

E: M.U.T.-III adapter 

harness

F: M.U.T.-III trigger 

harness

CAUTION

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

• Drive belt tension check

• Checking the ignition timing

• Checking the idle speed

B991668

MB991668

Belt tension meter set

Drive belt tension check (used 
together with V.C.I.)