Nissan Juke F15. Manual — part 652
EM-162
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
COMPONENT PARTS
- 2WD
- AWD
SPECIFICATION
Drive Belt
INFOID:0000000012197346
• A serpentine belt
*
that drives all auxiliary devices with a single belt is used.
*
Serpentine
• The drive belt auto tensioner is installed between the crank pulley and alternator.
SPECIFICATION
• The belt used is a V-ribbed 6PK belt.
• The drive belt auto tensioner mechanism contains a coil spring and uses the idler pulley to maintain appro-
priate belt tension at all times, making regular belt tension adjustment unnecessary.
1
: Catalyst converter (supercharger
exit)
2
: Catalyst converter adapter
3
: Front tube
4
: Heated oxygen sensor 2
5
: Three-way catalyst converter (un-
der floor)
JSBIA5738ZZ
1
: Catalyst converter (supercharger
exit)
2
: Catalyst converter adapter
3
: Heated oxygen sensor 2
4
: Front tube
5
: Three-way catalyst converter (un-
der floor)
JSBIA5739ZZ
Installation position
Supercharger exit
Underfloor
Structure
Monolithic (ceramic)
Monolithic (ceramic)
Capacity
liters (US qt, Imp qt)
0.92 (1, 6/8)
1.20 (1-2/8, 1)
Catalyst precious metal
types
Palladium, rhodium
Palladium, rhodium
1.
Alternator
2.
Drive belt auto tensioner
3.
Crankshaft pulley
4.
A/C compressor
5.
Water pump
6.
Drive belt
A. Usable range
B. Range for installation of new drive
belt
C. Indicator
JSBIA5907ZZ
COMPONENT PARTS
EM-163
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
High-pressure Fuel Pump
INFOID:0000000012197347
• A single-plunger type compact high-pressure fuel pump is used.
• The high-pressure fuel pump (1) is installed to thecamshaft bracket
rear, and is driven by a special cam that is installed on the cam-
shaft (EXH).
For details of operation and control, refer to
Rocker Cover
INFOID:0000000012197348
• A plastic rocker cover is used.
• The rocker cover includes a part where the oil filler cap is installed
and a screw for mounting the ignition coil.
Camshaft Sprocket
INFOID:0000000012197349
• A sintered alloy sprocket is used for each sprocket. The sprocket teeth are induction-hardened for improved
wear resistance.
• The camshaft sprockets used (both INT and EXH) are equipped
with integrated vane-type valve timing controller.
Camshaft
INFOID:0000000012197350
CAMSHAFT
Description
A
: To fuel rail
B
: From low-pressure fuel pump
JPBIA5011ZZ
A
: Ignition coil mounting screw
B
: Oil filler cap installation part
JPBIA5012ZZ
1
: Camshaft sprocket (EXH)
2
: Exhaust valve timing controller
3
: Intake valve timing controller
4
: Camshaft sprocket (INT)
JSBIA5741ZZ
EM-164
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
COMPONENT PARTS
• A special cast-iron camshaft is used.
• The cam lobe is processed with a nano-finish to reduce friction.
• A signal plate is installed at the rear end of each camshaft.
SPECIFICATION
• The cam profile delivers the optimal characteristics with a good balance of engine output performance, driv-
ability, fuel economy, and other performance.
• *1: Idling at coolant temperature of 60
°C or more
• *2: At maximum operation
• *3: At coolant temperature of 60
°C or less, or at engine start
• A valve timing control (VTC) system
*
is used that can change the camshaft phase as needed according to
the hydraulic pressure while maintaining a constant camshaft operating angle.
For control, refer to
EC-639, "INTAKE VALVE TIMING CONTROL : System Description"
(exhaust valve tim-
EC-642, "EXHAUST VALVE TIMING CONTROL : System Description"
(intake valve timing con-
trol).
*
: Valve timing control (VTC) system
1
: Camshaft (EXH)
2
: Camshaft (INT)
: Engine front
JPBIA5014ZZ
Valve timing
: Intake valve
: Exhaust valve
VTC Minimum phasing (Mechanical)
VTC Maximum phasing (Mechanical)
Engine start (Mechanical)
a
EXH valve
opening angle
b
INT valve
opening angle
c
INT open
d
INT closed
e
EXH closed
f
EXH open
VTC Minimum phasing
(Mechanical)
*1
212
236
ATDC34
ABDC90
ATDC3
BBDC29
VTC Maximum phasing
(Mechanical)
*2
BTDC31
ABDC25
ATDC63
ABDC31
Engine start (Mechanical)
*3
BTDC2
ABDC54
ATDC3
BBDC29
JSBIA5742ZZ
JSBIA5743ZZ
JSBIA5744ZZ
COMPONENT PARTS
EM-165
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
The valve timing can be controlled continually to the desired position within the movable range. This allows
optimal valve timing control according to the engine speed and load, greatly improving low and medium-
speed torque.
CAMSHAFT BRACKET
• Made of die-cast aluminum, and includes five journal supports for
each camshaft.
• Integrates the camshaft bracket to reduce the number of parts.
Valve
INFOID:0000000012197351
DESCRIPTION
A set of four valves is used for each cylinder: two intake valves and two exhaust valves.
VALVE
Description
Valves containing metallic sodium are used for the exhaust valves.
The valve stem is hollow and contains metallic sodium which has
high specific heat (absorbs a large amount of heat) and liquifies at
the temperatures at when the engine is running. This lowers the
valve temperature and improves intake efficiency.
NOTE:
With a valve containing metallic sodium, the opening and closing
motion of the valve agitates the liquefied metallic sodium. Heat from
the combustion chamber and exhaust port is released to the valve
guide, lowering the valve head temperature.
Specification
PRECAUTIONS FOR HANDLING VALVES CONTAINING METALLIC SODIUM
WARNING:
• Because metallic sodium is a strong alkali and there is the danger of violent chemical reactions,
work carefully and use sufficient caution when handling or disposing of it.
(Contact with the eye may cause blindness. Contact with the skin may cause burns. There is also the
risk of fire caused by chemical reaction.)
The metallic sodium contained in the valve is safe as long as it is not exposed to air.
• When scrapping a valve, or when a valve is damaged, remove the valve, process (neutralize) the
metallic sodium, and process the wastewater.
• Never deliberately break a valve or remove the metallic sodium.
VALVE LIFTER
Location
Intake
Exhaust
Valve lift
[mm(in)]
8.90 (0.35)
7.20 (0.28)
Overlap
(deg)
(
−31) – (+94)
: Engine front
JSBIA5745ZZ
JSBIA1699GB
Location
Intake
Exhaust
Valve
Head diameter
[mm(in)]
φ31.2 (1.22)
φ25.6 (1.01)
Stem diameter
[mm(in)]
φ5.5 (0.21)
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