Nissan Juke (2016 year). Service Repair Manual — part 326
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
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JSBIA5743ZZ
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Revision: November 2015
2016 JUKE
COMPONENT PARTS
EM-165
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
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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)]
φ
31.2 (1.22)
φ
25.6 (1.01)
Stem diameter
[mm(in)]
φ
5.5 (0.21)
Revision: November 2015
2016 JUKE
EM-166
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
COMPONENT PARTS
Description
• A thin valve lifter is used.
• Because a material with high hardness and high wear resistance is
used, regular maintenance of the valve clearance is not necessary.
• To adjust the valve clearance, change the valve lifter.
• The thickness of the valve lifter top surface is set in 0.02 mm
increments. The thickness is identified by the 3-digit number
(stamp) on the inside of the valve lifter.
Specification
VALVE SPRING, VALVE SPRING SEAT, VALVE RETAINER
• A single beehive spring is used for the valve spring (1) For reduc-
ing friction and preventing surging.
• For improving assembly workability, the valve spring seat (2) is
press-fit into the valve spring. (An assembly is set for the spring
and seat.)
• The valve springs for the intake and exhaust valves are different.
Identifier colors are used (
part). The intake valve springs are
white, and the exhaust valve springs are yellow.
• Carbon steel is used for the valve spring retainer (3) to improve
durability and heat resistance. The smaller size made possible by
use of the beehive spring also reduces the weight.
VALVE OIL SEAL
A type with a press-fit metal ring is used.
Cylinder Head
INFOID:0000000012197352
CYLINDER HEAD
• The material is aluminum alloy, and a cross-flow V 4-valve DOHC
is used for the intake valve layout.
• The combustion chamber is a compact pent-roof type using a V
arrangement with a smaller valve holding angle.
• Siamese ports are used for the intake port and exhaust port.
• The fuel injector installation part is placed on the bottom of the
intake port, and injects fuel directly into the cylinder.
• The spark plugs are located at the centers of the combustion chambers to increase combustion efficiency.
NOTE:
• Cross-flow: Method of installing the intake and exhaust manifold so that it is split left/right with respect to the
cylinder head.
• Pent-roof combustion chamber: Combustion chamber with an angled roof
• Siamese port: Two ports joined together
A
: Oil supply hole
B
: Stamp mark
C
: Thickness of valve lifter top sur-
face
JPBIA0368ZZ
Location
Intake
Exhaust
Valve lifter
Top surface thick-
ness
[mm(in)]
3.00 – 3.50 (0.11 - 0.138)
Number of settings
26 types
JSBIA1106ZZ
A
: Exhaust side
B
: Spark plug mounting part
C
: Intake side
D
: Fuel injector mounting part
JPBIA5016ZZ
Revision: November 2015
2016 JUKE
COMPONENT PARTS
EM-167
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
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CYLINDER HEAD BOLT
• TORX-head (E18) M11
×
1.25 size flange bolts are used.
• The bolt tightening method is double tightening in six stages and angle tightening (plastic region tightening)
to ensure even and stable tightening axial force.
CYLINDER HEAD GASKET
• A three-layer metal structure on a stainless steel base is used.
• The gasket thickness is 0.72 mm (when tightened), and the bore is
φ
80.7 mm.
Front Cover
INFOID:0000000012197353
• An aluminum die-cast front cover is used.
• The VTC cover uses a split structure. The VTC cover contains oil
channels for the intake and exhaust valve timing controllers.
• It also contains a part for installation of the front oil seal.
Timing Chain
INFOID:0000000012197354
DESCRIPTION
• A timing chain which drives the camshaft and an oil pump drive
chain are used.
• A small-pitch silent chain is used for both chains.
• Using a small-pitch silent chain allows a smaller sprocket and other changes for a more compact and light-
weight camshaft drive system, and also reduces noise.
Specification
1
: VTC cover
2
: Front cover
3
: Front oil seal
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1
: Timing chain
2
: Camshaft sprocket (EXH side)
3
: Timing chain slack guide
4
: Chain tensioner (for timing chain)
5
: Crankshaft sprocket
6
: Oil pump drive chain
7
: Oil pump sprocket
8
: Chain tensioner
(for oil pump drive chain)
9
: Timing chain tension guide
10
: Camshaft sprocket (INT side)
A
: Matching mark (dark blue link)
B
: Matching mark (outer groove)
C
: Crankshaft key
D
: Matching mark (stamp)
E
: Matching mark (yellow link)
F
: Matching mark (outer groove)
JSBIA5747ZZ
Revision: November 2015
2016 JUKE
EM-168
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
COMPONENT PARTS
TIMING CHAIN
• A small-pitch [6.35 mm (0.25 in)] silent chain is used.
• The silent chain reduces the engagement contact angle with the sprocket, and the smaller chain pitch
reduces the speed of engagement with the sprocket, reducing chain operating noise.
CHAIN TENSIONER
• A hydraulic chain tensioner with ratchet mechanism is used.
• The chain tensioner (for timing chain) applies optimal tension to the timing chain via the timing chain slack
guide by means of the engine oil pressure and spring force.
TIMING CHAIN GUIDE
• The timing chain tension guide is installed between the crankshaft sprocket and camshaft sprocket (INT).
The timing chain slack guide is installed between the camshaft sprocket (EXH) and crankshaft sprocket.
These prevent chain link skipping and reduce noise.
• A plastic shoe is used for each chain guide for reducing friction.
CRANKSHAFT SPROCKET
• Integrated sintered alloy sprockets for the timing chain and oil
pump drive chain are used.
• Carburizing is applied to all surfaces to improve rigidity and wear
resistance.
OIL PUMP DRIVE CHAIN
• An oil pump drive chain is used to drive the oil pump.
• In the same way as the timing chain, a silent chain is used for the
oil pump drive chain.
• A chain tensioner which includes a chain guide and coil spring is
used.
• The chain tensioner (for oil spring drive chain) is installed between
the crankshaft sprocket and oil pump sprocket (slack side).
Crankshaft Pulley
INFOID:0000000012197355
• A crankshaft pulley with cast-iron torsional damper is used.
• Angle tightening is used for tightening the crankshaft pulley bolts. The pulley has angle marks at 60
°
inter-
vals for improved workability.
For camshaft
drive
Camshaft sprocket
No. of teeth
46
Crankshaft sprocket
No. of teeth
23
Timing chain
Total No. of links
162
No. of links between
timing marks
Between crankshaft sprocket and camshaft sprocket (INT)
72
Between camshaft sprocket (INT) and camshaft sprocket (EXH)
18
Oil pump drive
Crankshaft sprocket
No. of teeth
23
Oil pump sprocket
No. of teeth
23
Oil pump drive chain
Total No. of links
58
A
: Timing chain side
B
: Oil pump drive chain side
JSBIA5749ZZ
1
: Oil pump drive chain
2
: Crankshaft sprocket
3
: Oil pump sprocket
JSBIA5752ZZ
Revision: November 2015
2016 JUKE
COMPONENT PARTS
EM-169
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
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Crankshaft
INFOID:0000000012197356
CRANKSHAFT
• A forged crankshaft with five journal supports is used.
• Four counterweights are installed to reduce vibration.
• Fillet rolling provided to the journals and both ends of the pins to
reinforce each shaft part.
• A micro finish is applied to the journal and pin surfaces to reduce
friction.
• A crankshaft position sensor signal plate is installed on the No. 4
counterweight.
MAIN BEARING AND MAIN BEARING CAP BOLT
• Five bearing supports are used.
• A selective assembly method is used for the main bearing to ensure correct crank journal clearance.
• The bolts are external TORX (T-type) bolts. Angle tightening is used to tighten the bolts to ensure even and
stable tightening axial force.
Piston
INFOID:0000000012197357
• A shallow part (A) is created in the piston top surface. This gener-
ates a tumble flow at the layered combustion compression stroke
and forms an ignitable mixed layer close to the spark plug.
• A thermal flow type is used to reduce the piston temperature.
• A plastic coating is applied to the piston skirt to reduce friction.
• A full-float method is used for the mating of the piston pin and con-
necting rod.
• Anodized aluminum treatment is performed for the piston top ring
groove to improve durability.
• Three rings are used: a narrow top ring, a second ring, and an oil
ring.
NOTE:
• Thermal flow type piston: A piston with only drill holes between the ring land and skirt to facilitate the flow of
heat from the top surface of the piston to the skirt.
• Anodized aluminum treatment: Sealing which forms a film by anodic oxidation of aluminum and aluminum
alloy to prevent corrosion.
• Tumble flow: Flow that swirls in the vertical direction inside the cylinder.
SPECIFICATION
Connecting Rod
INFOID:0000000012197358
• The connecting rod is a high-rigidity fracture-split type.
CAUTION:
1
: Counterweight
2
: Signal plate
: Engine front
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Piston
Standard diameter
[mm(in)]
φ
79.67 (3.13)
Total height
a [mm(in)]
53.83 (2.12)
Compression height
b [mm(in)]
35.33 (1.39)
Pin hole diameter
c [mm(in)]
φ
22 (0.87)
Material
Aluminum alloy
Piston pin
Outer diameter
×
Bore
×
Length
[mm(in)]
φ
22
×φ
12.5
×
54.5
(0.87, 0.49, 2.14)
Material
Special carbon
steel
JPBIA5023ZZ
Revision: November 2015
2016 JUKE
EM-170
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
COMPONENT PARTS
Never set the connecting rod with its fracture-split surface (unmachined surface) facing downward.
Also never allow it to contact with the split-fracture surface for preventing scratches.
• Angle tightening is used for the connecting rod tightening method for ensuring even and stable tightening
axial force.
SPECIFICATION
Cylinder Block
INFOID:0000000012197359
• An aluminum die-cast half-skirt block with mirror bore coating is
used.
• The water channel on the cylinder block left side is integrated with
the block to allow a more compact engine.
• The insides of the cylinder bores are coated with a thin iron film
and the cylinder liners are eliminated for reducing weight and
improving cooling performance.
• The centers of the cylinder and crankshaft are offset for reducing
friction.
• A shallower water jacket (shallower base) is used around the cylin-
der bore to reduce heat loss to the coolant and maintain an even
liner temperature.
• Projecting shapes are used on the cylinder liner periphery for improving aluminum adhesion for reducing
bore deformation and improving cooling performance by increasing the surface area.
A
: Fracture-split surface
B
: Cylinder No
C
: Connecting rod big end diameter grade No
D
: Front mark
Connecting rod
Center dis-
tance
Lc [mm(in)]
139.02 (5.47)
Large end di-
ameter
×
width
D
×
B [mm(in)]
φ
47
×
20.5 (0.27
×
0.81)
Small end di-
ameter
×
width
d
×
b [mm(in)]
φ
22
×
20.5 (0.87
×
0.81)
Connecting rod
bearing
Inner diameter
[mm(in)]
φ
44 (1.73)
Bearing width
[mm(in)]
16 (0.63)
Connecting rod
bolt
Thread size
M8
×
1.0
Length under
head
[mm(in)]
37.75 (1.49)
JSBIA2914ZZ
A
: Cylinder block
B
: Water piping
C
: Stamped location of engine model No.
1
: Mirror bore coating
2
: Water jacket
A
: Cylinder center
B
: Crankshaft center
C
: Offset
D
: Approximately the same temperature
JPBIA5024ZZ
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Revision: November 2015
2016 JUKE
COMPONENT PARTS
EM-171
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
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Front Oil Seal
INFOID:0000000012197360
A structure is used in which the front oil seal is applied to the front
cover.
Rear Oil Seal
INFOID:0000000012197361
A structure is used in which the rear oil seal is applied directly between the cylinder block and oil pan (upper).
Oil Pan
INFOID:0000000012197362
• A split oil pan combining a die-cast aluminum pan and sheet metal
pan is used.
• An oil gallery is provided on the oil pan (upper), and the oil filter is
mounted directly.
Engine Mount
INFOID:0000000012197363
• A type with three supporting mounts (left, right, rear) is used.
• Aluminum brackets are used for the right and left engine mounts to reduce weight, improve rigidity, and
improve quietness.
• A fluid mount insulator is used for the right engine mount, and a rubber mount insulator is used for the left
engine mount.
• A torque rod type is used for the rear engine mount to restrict engine movement.
2WD
1
: VTC cover
2
: Front cover
3
: Front oil seal
JSBIA5746ZZ
1
: Oil pan (upper)
2
: Oil pan (lower)
A
: Oil filter mounting part
: Engine front
JPBIA5026ZZ
Revision: November 2015
2016 JUKE
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