Mitsubishi Galant 9G. Manual — part 321

NOTES

11A-1

GROUP 11A

ENGINE

MECHANICAL

<2.4L ENGINE>

CONTENTS

GENERAL DESCRIPTION. . . . . . . . .

11A-2

ENGINE DIAGNOSIS. . . . . . . . . . . . .

11A-3

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

11A-4

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

11A-8

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

11A-8

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

11A-8

VALVE CLEARANCE CHECK AND
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . .

11A-10

ROCKER ARM PISTON OPERATION
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11A-11

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

11A-12

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

11A-14

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

11A-15

COMPRESSION PRESSURE CHECK. . . .

11A-16

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

11A-17

CYLINDER BLOCK HEATER UNIT CHECK

11A-18

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

11A-19

REMOVAL AND INSTALLATION . . . . . . . .

11A-19

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

11A-27

REMOVAL AND INSTALLATION . . . . . . . .

11A-27

CAMSHAFT AND VALVE STEM
SEAL . . . . . . . . . . . . . . . . . . . . . . . . . .

11A-28

REMOVAL AND INSTALLATION . . . . . . . .

11A-28

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

11A-37

REMOVAL AND INSTALLATION . . . . . . . .

11A-37

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

11A-39

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

11A-40

REMOVAL AND INSTALLATION . . . . . . . .

11A-40

CYLINDER HEAD GASKET . . . . . . . .

11A-43

REMOVAL AND INSTALLATION . . . . . . . .

11A-43

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

11A-51

REMOVAL AND INSTALLATION . . . . . . . .

11A-51

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

11A-63

CYLINDER BLOCK HEATER UNIT . .

11A-64

REMOVAL AND INSTALLATION . . . . . . . .

11A-64

SPECIFICATIONS . . . . . . . . . . . . . . .

11A-66

FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . .

11A-66

SERVICE SPECIFICATIONS . . . . . . . . . . .

11A-68

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

11A-68

GENERAL DESCRIPTION

TSB Revision

ENGINE MECHANICAL <2.4L ENGINE>

11A-2

GENERAL DESCRIPTION

M1111000100754

The 4G69 (2.4L) engine is an in-line four cylinder
engine. The cylinder numbers are assigned as 1

− 2

− 3 − 4 from the front of the engine (timing belt side).

This engine is fired in the order of the 1, 3, 4 and 2
cylinders.

ITEM

SPECIFICATION

Type

In-line SOHC

Number of cylinders

4

Bore mm (in)

87 (3.43)

Stroke mm (in)

100.0 (3.94)

Total displacement cm

3

(cu in)

2,378 (145.1)

Compression ratio

9.5

Firing order

1

− 3 − 4 − 2

Counterbalance shaft

Equipped

Valve timing

Intake valve

Opens (BTDC)

4

° <Low speed cam A>

6

° <Low speed cam B>

24

° <High speed cam>

Closes (ABDC)

42

° <Low speed cam A>

44

° <Low speed cam B>

70

° <High speed cam>

Exhaust valve

Opens (BBDC)

58

°

Closes (ATDC)

17

°

Lubrication system

Pressure feed, full-flow filtration

Oil pump type

Involute gear type

ENGINE DIAGNOSIS

TSB Revision

ENGINE MECHANICAL <2.4L ENGINE>

11A-3

ENGINE DIAGNOSIS

M1111000700262

SYMPTOM

PROBABLE CAUSE

REMEDY

Compression is too
low

Blown cylinder head gasket

Replace the gasket

Worn or damaged piston rings

Replace the rings

Worn piston or cylinder

Repair or replace the piston and/or the
cylinder block

Worn or damaged valve seat

Repair or replace the valve and/or the
seat ring

Drop in engine oil
pressure

Engine oil level is too low

Check the engine oil level

Malfunction of engine oil pressure switch Replace the engine oil pressure switch
Clogged oil filter

Install a new filter

Worn oil pump gears or cover

Replace the gears and/or the cover

Thin or diluted engine oil

Change the engine oil to correct viscosity

Stuck (opened) oil relief valve

Repair the relief valve

Excessive bearing clearance

Replace the bearings

Engine oil pressure
too high

Stuck (closed) oil relief valve

Repair the relief valve

Noisy valves

Incorrect valve clearance

Adjust valve clearance

Thin or diluted engine oil (low engine oil
pressure)

Change the engine oil

Worn or damaged valve stem or valve
guide

Replace the valve and/or the guide

Connecting rod
noise/main bearing
noise

Insufficient oil supply

Check the engine oil level

Low engine oil pressure

Refer to engine oil pressure drop
symptoms above

Thin or diluted engine oil

Change the engine oil

Excessive bearing clearance

Replace the bearings