Mitsubishi Evolution X. Manual — part 167

11-1

GROUP 11

ENGINE

CONTENTS

ENGINE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11A

ENGINE OVERHAUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11B

NOTES

11A-1

GROUP 11A

ENGINE

MECHANICAL

CONTENTS

GENERAL INFORMATION . . . . . . . .

11A-2

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

11A-2

SERVICE SPECIFICATIONS. . . . . . .

11A-3

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

11A-4

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

11A-5

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

11A-8

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

11A-8

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

11A-8

VALVE CLEARANCE CHECK AND

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

11A-10

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

11A-10

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

11A-12

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

11A-13

COMPRESSION PRESSURE CHECK. . . .

11A-15

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

11A-16

TIMING CHAIN ELONGATION VISUAL

CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11A-17

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

11A-21

REMOVAL AND INSTALLATION . . . . . . . .

11A-21

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

11A-25

REMOVAL AND INSTALLATION . . . . . . . .

11A-25

VALVE STEM SEAL . . . . . . . . . . . . . .

11A-43

REMOVAL AND INSTALLATION . . . . . . . .

11A-43

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

11A-51

REMOVAL AND INSTALLATION . . . . . . . .

11A-51

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

11A-54

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

11A-54

REMOVAL AND INSTALLATION . . . . . . . .

11A-54

CYLINDER HEAD GASKET . . . . . . . .

11A-57

REMOVAL AND INSTALLATION . . . . . . . .

11A-57

TIMING CHAIN . . . . . . . . . . . . . . . . . .

11A-69

REMOVAL AND INSTALLATION . . . . . . . .

11A-69

ENGINE ASSEMBLY* . . . . . . . . . . . .

11A-80

REMOVAL AND INSTALLATION . . . . . . . .

11A-80

WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES

WARNING

•

Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to

personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver and

passenger (from rendering the SRS inoperative).

•

Service or maintenance of any SRS component or SRS-related component must be performed only at an

authorized MITSUBISHI dealer.

•

MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B - Supplemental

Restraint System (SRS) before beginning any service or maintenance of any component of the SRS or any

SRS-related component.

NOTE

The SRS includes the following components: SRS air bag control unit, SRS warning light, front impact sensors, driver’s and

passenger’s (front) air bag modules, knee air bag module, side-airbag module, curtain air bag module, side impact sensors,

seat belt pre-tensioners, clock spring, and interconnecting wiring. Other SRS-related components (that may have to be

removed/installed in connection with SRS service or maintenance) are indicated in the table of contents by an asterisk (*).

GENERAL INFORMATION

TSB Revision

ENGINE MECHANICAL

11A-2

GENERAL INFORMATION

M1111000101304

The 4B11 (2.0 L) 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).
The firing order is 1-3-4-2.

ENGINE DIAGNOSIS

M1111000700392

ITEMS

SPECIFICATIONS

Type

In-line DOHC

Number of cylinders

4

Bore mm (in)

86 (3.39)

Stroke mm (in)

86 (3.39)

Total displacement cm

3

(cu. in)

1,998 (121.9)

Compression ratio

9.0

Firing order

1-3-4-2

Valve timing

Intake valve

Opens (BTDC)

10

° − 35°

Closes (ABDC)

62

° − 37°

Exhaust valve

Opens (BBDC)

44

° − 9°

Closes (ATDC)

0

° − 35°

SYMPTOMS

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 the 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.