Nissan Juke F15. Manual - part 638

EM-106

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR FOR NISMO RS MODELS]

CYLINDER HEAD

d. Using valve seat cutter set (commercial service tool) or valve

seat grinder, finish valve seat to the specified dimensions. For

dimensions, refer to 

EM-142, "Cylinder Head"

.

CAUTION:

When using valve seat cutter, firmly grip the cutter handle

with both hands. Then, press on the contacting surface all

around the circumference to cut in a single drive. Improper

pressure on with the cutter or cutting many different times

may result in stage valve seat. 

e. Using compound, grind to adjust valve fitting. 
f.

Check again for normal contact. Refer to 

EM-107, "Inspection"

.

3. Install valve oil seal.

• Install with a valve oil seal drift [SST: KV10115600 (J-38958)]

(A) to match dimension in the figure.

NOTE:

Dimension is height that measured before installing valve

spring (with valve spring seat).

4. Install valve.

• Install larger diameter to intake side.

5. Install valve spring (with valve spring seat).

• Install smaller pitch (valve spring seat side) to cylinder head

side (B).

• Confirm identification color (A) of valve spring.

6. Install valve spring retainer.
7. Install valve collet.

• Compress valve spring with the valve spring compressor [SST:

KV10116200 (J-26336-A)] (A), the attachment [SST:

KV10115900 (J-26336-20)] (C), and the adapter [SST:

KV10109220 ( — )] (B). Install valve collet with a magnet

hand.

CAUTION:

When working care not to damage valve lifter holes.

• Tap valve stem edge lightly with a plastic hammer after instal-

lation to check its installed condition.

8. Install valve lifter.

• Install it in the original position.

9. Install spark plug with spark plug wrench (commercial service tool).

SEM934C

Height (H)

: 15.1 - 15.7 mm (0.594 - 0.618 in)

PBIC3211J

1

: Valve spring seat (Do not remove from valve spring.)

Intake

: White

Exhaust

: Yellow green

JPBIA4479ZZ

JPBIA1365ZZ

CYLINDER HEAD

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Inspection

INFOID:0000000012197305

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between (d1) and (d2)

exceeds the limit, replace them with a new one. 

• If reduction of outer diameter appears in a position other than (d2),

use it as (d2) point.

Cylinder Head Distortion

NOTE:

When performing this inspection, cylinder block distortion should be also checked. Refer to 

EM-123, "Inspec-

tion"

.

1. Wipe off engine oil and remove water scale (like deposit), gasket, sealant, carbon, etc. with a scraper.

CAUTION:

Never allow gasket debris to enter passages for engine oil or water.

2. At each of several locations on bottom surface of cylinder head,

measure the distortion in six directions using straightedge (A)

and feeler gauge (B).

• If it exceeds the limit, replace cylinder head.

INSPECTION AFTER DISASSEMBLY

VALVE DIMENSIONS

• Check the dimensions of each valve. For the dimensions, refer to 

EM-142, "Cylinder Head"

.

• If dimensions are out of the standard, replace valve and check valve seat contact. Refer to “VALVE SEAT

CONTACT”.

VALVE GUIDE CLEARANCE

Valve Stem Diameter

• Measure the diameter of valve stem with micrometer (A).

Valve Guide Inner Diameter

• Measure the inner diameter of valve guide with bore gauge.

Valve Guide Clearance

• (Valve guide clearance) = (Valve guide inner diameter) – (Valve

stem diameter)

Limit [(d1) – (d2)]: 0.15 mm (0.0059 in)

PBIC3994E

Limit: Refer to 

EM-142, "Cylinder Head"

.

PBIC3207J

Standard: Refer to 

EM-142, "Cylinder Head"

.

Standard: Refer to 

EM-142, "Cylinder Head"

.

Standard and Limit: Refer to 

EM-142, "Cylinder Head"

.

PBIC3213J

EM-108

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR FOR NISMO RS MODELS]

CYLINDER HEAD

• If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be

replaced. Refer to 

EM-102, "Disassembly and Assembly"

.

VALVE SEAT CONTACT

• After confirming that the dimensions of valve guides and valves are within the specifications, perform this

procedure.

• Apply prussian blue (or white lead) onto contacting surface of valve seat to check the condition of the valve

contact on the surface.

• Check if the contact area band is continuous all around the circum-

ference.

• If not, grind to adjust valve fitting and check again. If the contacting

surface still has “NG” conditions (B) even after the recheck,

replace valve seat. Refer to 

EM-102, "Disassembly and Assem-

bly"

.

VALVE SPRING SQUARENESS

• Set a try square (A) along the side of valve spring and rotate

spring. Measure the maximum clearance between the top of spring

and try square.

• If it exceeds the limit, replace valve spring.

VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

• Check valve spring pressure with valve spring seat installed at the

specified spring height.

CAUTION:

Never remove valve spring seat from valve spring.

• If the installation load or load with valve open is out of the stan-

dard, replace valve spring (with valve spring seat).

INSPECTION AFTER INSTALLATION

Inspection for Leakage

The following are procedures for checking fluids leakage, lubricates leakage, and exhaust gases leakage.

• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required

quantity, fill to the specified level. Refer to 

MA-11, "Fluids and Lubricants"

.

• Use procedure below to check for fuel leakage.

- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-

age at connection points.

- Start engine. With engine speed increased, check again for fuel leakage at connection points.

• Run engine to check for unusual noise and vibration.

• Warm up engine thoroughly to check there is no leakage of fuel, exhaust gases, or any oil/fluids including

engine oil and engine coolant.

• Bleed air from lines and hoses of applicable lines, such as in cooling system.

• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the

specified level, if necessary.

A

:  OK

JPBIA0187ZZ

B

:  Contact

Limit

: Refer to 

EM-142, "Cylinder Head"

.

JPBIA4391ZZ

Standard

: Refer to 

EM-142, "Cylinder Head"

.

SEM113

CYLINDER HEAD

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Summary of the inspection items:

*: Power steering fluid, brake fluid, etc.

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Transmission / 
transaxle fluid

AT & CVT Models

Leakage

Level / Leakage

Leakage

MT Models

Level / Leakage

Leakage

Level / Leakage

Other oils and fluids*

Level

Leakage

Level

Fuel

Leakage

Leakage

Leakage

Exhaust gases

—

Leakage

—