Mazda 6. Manual - part 3

B–1

B

B

ENGINE

ABBREVIATIONS .................................................. B-2

ABBREVIATIONS ................................................ B-2

OUTLINE ................................................................ B-2

OUTLINE OF CONSTRUCTION.......................... B-2
FEATURES .......................................................... B-2
ENGINE PERFORMANCE CURVE..................... B-3
SPECIFICATIONS ............................................... B-4
STRUCTURAL VIEW........................................... B-4

ENGINE .................................................................. B-5

CYLINDER HEAD COVER .................................. B-5
CYLINDER HEAD  ............................................... B-5
CYLINDER HEAD GASKET ................................ B-6
CYLINDER BLOCK ............................................. B-6
CRANKSHAFT, MAIN BEARING......................... B-8
BALANCER UNIT ................................................ B-9
CRANKSHAFT PULLEY .................................... B-11
ENGINE FRONT COVER .................................. B-12
PISTON, PISTON RING, PISTON PIN .............. B-13
CONNECTING ROD, 

CONNECTING ROD BEARING...................... B-14

DRIVE BELT ...................................................... B-15
ENGINE MOUNT ............................................... B-16

VALVE MECHANISM ........................................... B-19

VALVE MECHANISM......................................... B-19
CAMSHAFT ....................................................... B-20
CAMSHAFT SPROCKET................................... B-22
CRANKSHAFT SPROCKET .............................. B-23
TIMING CHAIN, CHAIN TENSIONER ............... B-24
VALVE, VALVE SPRING, VALVE SEAL, 

VALVE GUIDE ................................................ B-25

TAPPET ............................................................. B-26
VALVE MECHANISM......................................... B-27
VARIABLE VALVE TIMING ACTUATOR........... B-33
OIL CONTROL VALVE (OCV) ........................... B-33

B–2

ABBREVIATIONS , OUTLINE

ABBREVIATIONS

A6E220102000T01

End Of Sie

OUTLINE OF CONSTRUCTION

A6E220202000T01

•

The new L8 engine models (1.8L) has been adopted for European specs.

•

The new LF engine models (2.0L) has been adopted.

•

The new L3 (with variable valve timing mechanism) engine models (2.3L) has been adopted for European 
specs.

End Of Sie

FEATURES

A6E220202000T02

Improved engine performance

•

The variable valve timing mechanism has been adopted for L3 engine models (2.3L).

Reduced engine weight

•

Main parts (cylinder head and cylinder block) made of aluminum alloy.

Reduced engine noise and vibration

•

The cylinder head is made of aluminum alloy.

•

The cassette type balancer unit has been adopted for the L3 engine models (2.3L).

•

Silent timing chain has been adopted.

•

A deep skirt type and forms the ladder frame structure with the integrated main bearing cap has been adopted 
for the cylinder block.

•

The crankshaft pulley with torsional damper has been adopted.

•

The engine mount of pendulum type has been adopted.

Improved serviceability

•

The drive belt of serpentine type has been adopted.

•

Tension of the drive belt is adjusted automatically with an auto-tensioner.

•

Timing chains have been adopted to eliminate the need for replacement.

•

The engine front cover with service hole has been adopted. (for unlocking the chain adjust ratchet, and 
securing the tensioner arm).

End Of Sie

ABBREVIATIONS

A/C

Air conditioner

ABDC

After bottom dead center

ATDC

After top dead center

BBDC

Before bottom dead center

BTDC

Before bottom dead center

DOHC

Double overhead camshaft

EX

Exhaust

IN

Intake

OCV

Oil control valve

P/S

Power steering

PCV

Positive crankcase ventilation

SST

Special service tool

TDC

Top dead center

OUTLINE

OUTLINE 

B–3

B

ENGINE PERFORMANCE CURVE

A6E220202000T04

AME2202N001

1

Engine speed

2

Output

3

Torque

B–4

OUTLINE 

End Of Sie

SPECIFICATIONS

A6E220202000T03

End Of Sie

STRUCTURAL VIEW

A6E220202000T05

End Of Sie

Item

Specification

L8

LF

L3 

Type

Gasoline, 4-cycle

Cylinder arrangement and number

In-line, 4-cylinder

Combustion chamber

Pentroof

Valve system

DOHC, timing chain driven, 16 valves

Displacement (ml 

{cc, 

cu 

in})

1,798 

{1,798, 109.7}

1,999

 {1,999, 121.9}

2,261

 {2,261, 137.9}

Bore 

×

 stroke

(mm {in})

83.0 

×

 83.1 

{3.27 

×

3.27}

87.5 

×

 83.1

 {3.44 

×

3.27}

87.5 

×

 94.0

 {3.44 

×

 3.70}

Compression ratio

10.8:1

10.8:1

10.6:1

Compression pressure

(kPa {kgf/cm

2

, psi} [rpm])

1,750 {17.85, 253.8} 

[300]

1,720 {17.54, 

249.5} [300]

1,430 {14.58, 207.4} 

[290]

Valve timing

IN

Open

BTDC (

°

)

4

4

0—25

Close

ABDC (

°

)

33

52

0—37

EX

Open

BBDC (

°

)

37

37

42

Close

ATDC (

°

)

4

4

5

Valve 
clearance

(mm {in})

IN

0.22 {0.0087}— 0.28 {0.011} [Engine cold]

EX

0.27 {0.011}— 0.33 {0.012} [Engine cold]

AME2202N002