Mazda 6. Manual — part 3
B–1
B
B
ENGINE
ABBREVIATIONS . . . . . . . . . . . . .. B-2
ABBREVIATIONS . . . . . . . . . . . . B-2
OUTLINE . . . . . . . . . . . . . . . . B-2
ENGINE . . . . . . . . . . . . . . . . .. B-5
CONNECTING ROD BEARING. . . . . .. B-14
DRIVE BELT . . . . . . . . . . . . . .. B-15
ENGINE MOUNT . . . . . . . . . . . ... B-16
VALVE MECHANISM . . . . . . . . . . ... B-19
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
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