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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-

ing control),

EC-642, "EXHAUST VALVE TIMING CONTROL : System Description"

(intake valve timing con-

trol).

: Valve timing control (VTC) system

: Camshaft (EXH)

: Camshaft (INT)

: Engine front

JPBIA5014ZZ

Valve timing

: Intake valve
: Exhaust valve

VTC Minimum phasing (Mechanical)

VTC Maximum phasing (Mechanical)

Engine start (Mechanical)

EXH valve

opening angle

INT valve

opening angle

INT open

INT closed

EXH closed

EXH open

VTC Minimum phasing

(Mechanical)

212

236

ATDC34

ABDC90

ATDC3

BBDC29

VTC Maximum phasing

(Mechanical)

BTDC31

ABDC25

ATDC63

ABDC31

Engine start (Mechanical)

BTDC2

ABDC54

ATDC3

BBDC29

JSBIA5742ZZ

JSBIA5743ZZ

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Revision: November 2015

2016 JUKE

COMPONENT PARTS

EM-165

< SYSTEM DESCRIPTION >

[MR EXCEPT FOR NISMO RS MODELS]

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)]

31.2 (1.22)

25.6 (1.01)

Stem diameter

[mm(in)]

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

: Oil supply hole

: Stamp mark

: Thickness of valve lifter top sur-
face

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Location

Intake

Exhaust

Valve lifter

Top surface thick-
ness

[mm(in)]

3.00 – 3.50 (0.11 - 0.138)

Number of settings

26 types

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: Exhaust side

: Spark plug mounting part

: Intake side

: Fuel injector mounting part

JPBIA5016ZZ

Revision: November 2015

2016 JUKE

COMPONENT PARTS

EM-167

< SYSTEM DESCRIPTION >

[MR EXCEPT FOR NISMO RS MODELS]

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

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

: VTC cover

: Front cover

: Front oil seal

JSBIA5746ZZ

: Timing chain

: Camshaft sprocket (EXH side)

: Timing chain slack guide

: Chain tensioner (for timing chain)

: Crankshaft sprocket

: Oil pump drive chain

: Oil pump sprocket

: Chain tensioner
(for oil pump drive chain)

: Timing chain tension guide

: Camshaft sprocket (INT side)

: Matching mark (dark blue link)

: Matching mark (outer groove)

: Crankshaft key

: Matching mark (stamp)

: Matching mark (yellow link)

: 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

Crankshaft sprocket

No. of teeth

Timing chain

Total No. of links

162

No. of links between
timing marks

Between crankshaft sprocket and camshaft sprocket (INT)

Between camshaft sprocket (INT) and camshaft sprocket (EXH)

Oil pump drive

Crankshaft sprocket

No. of teeth

Oil pump sprocket

No. of teeth

Oil pump drive chain

Total No. of links

: Timing chain side

: Oil pump drive chain side

JSBIA5749ZZ

: Oil pump drive chain

: Crankshaft sprocket

: Oil pump sprocket

JSBIA5752ZZ

Revision: November 2015

2016 JUKE

COMPONENT PARTS

EM-169

< SYSTEM DESCRIPTION >

[MR EXCEPT FOR NISMO RS MODELS]

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:

: Counterweight

: Signal plate

: Engine front

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JSBIA5753ZZ

Piston

Standard diameter

[mm(in)]

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)]

22 (0.87)

Material

Aluminum alloy

Piston pin

Outer diameter

Bore

Length

[mm(in)]

×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.

: Fracture-split surface

: Cylinder No

: Connecting rod big end diameter grade No

: Front mark

Connecting rod

Center dis-
tance

Lc [mm(in)]

139.02 (5.47)

Large end di-
ameter

width

B [mm(in)]

20.5 (0.27

0.81)

Small end di-
ameter

width

b [mm(in)]

20.5 (0.87

0.81)

Connecting rod
bearing

Inner diameter

[mm(in)]

44 (1.73)

Bearing width

[mm(in)]

16 (0.63)

Connecting rod
bolt

Thread size

1.0

Length under
head

[mm(in)]

37.75 (1.49)

JSBIA2914ZZ

: Cylinder block

: Water piping

: Stamped location of engine model No.

: Mirror bore coating

: Water jacket

: Cylinder center

: Crankshaft center

: Offset

: Approximately the same temperature

JPBIA5024ZZ

JPBIA5025ZZ

Revision: November 2015

2016 JUKE

COMPONENT PARTS

EM-171

< SYSTEM DESCRIPTION >

[MR EXCEPT FOR NISMO RS MODELS]

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

: VTC cover

: Front cover

: Front oil seal

JSBIA5746ZZ

: Oil pan (upper)

: Oil pan (lower)

: Oil filter mounting part

: Engine front

JPBIA5026ZZ

Revision: November 2015

2016 JUKE

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