Nissan Cube. Manual - part 417

EM-72

< REMOVAL AND INSTALLATION >

CYLINDER HEAD

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-116, "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)

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

replaced. Refer to

EM-67, "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-67, "Disassembly and Assembly"

VALVE SPRING SQUARENESS

Limit: Refer to

EM-116, "Cylinder Head"

PBIC3207J

Standard: Refer to

EM-116, "Cylinder Head"

Standard: Refer to

EM-116, "Cylinder Head"

Standard and Limit: Refer to

EM-116, "Cylinder Head"

PBIC3213J

: OK

JPBIA0187ZZ

CYLINDER HEAD

EM-73

< REMOVAL AND INSTALLATION >

• 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-10, "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.

Summary of the inspection items:

*: Power steering fluid, brake fluid, etc.

: Contact

Limit

: Refer to

EM-116, "Cylinder Head"

PBIC3219J

Standard

: Refer to

EM-116, "Cylinder Head"

SEM113

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

Exhaust gases

—

Leakage

—

EM-74

< UNIT REMOVAL AND INSTALLATION >

ENGINE ASSEMBLY

UNIT REMOVAL AND INSTALLATION

ENGINE ASSEMBLY

Exploded View

INFOID:0000000009944958

CAUTION:

Check that the stud bolt (*2) is tight at the specified torque before tightening the mounting nut (*1)
shown in the figure. [Stud bolt (*2) may be loosened after loosening the mounting nut (*1)]

Removal and Installation

INFOID:0000000009944959

WARNING:

Upper torque rod (RH)

Washer

Engine mounting insulator (RH)

Engine mounting bracket (RH)

Rear engine mounting bracket

Washer

Rear torque rod

Engine mounting bracket (LH)

Engine mounting bracket support
(LH)

10. Engine mounting insulator (LH)

Front mark

M/T models

: Always replace after every disassembly.

: N·m (kg-m, ft-lb)

JPBIA2912GB

ENGINE ASSEMBLY

EM-75

< UNIT REMOVAL AND INSTALLATION >

• Situate the vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• Attach proper slingers and bolts described in PARTS CATALOG if engine slingers are not equipped.

CAUTION:

• Always be careful to work safely, avoid forceful or uninstructed operations.
• Never start working until exhaust system and coolant are cool enough.
• If items or work required are not covered by the engine section, refer to the applicable sections.
• Always use the support point specified for lifting.
• Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for unavoid-

able reasons, support at the rear axle jacking point with a transmission jack or similar tool before
starting work, in preparation for the backward shift of center of gravity.

• For supporting points for lifting and jacking point at rear axle, refer to

GI-32, "Garage Jack and

Safety Stand and 2-Pole Lift"

NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.

REMOVAL

Outline

Remove the engine and the transaxle assembly from the vehicle downward. Separate the engine and the tran-
saxle.

Preparation

Release fuel pressure. Refer to

EC-478, "Inspection"

Drain engine coolant from radiator. Refer to

CO-8, "Draining"

CAUTION:

• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.

Remove the following parts.
• Engine undercover
• Front road wheels and tires
• Front fender protector (RH and LH): Refer to

EXT-21, "FENDER PROTECTOR : Exploded View"

• Drive belt: Refer to

EM-13, "Removal and Installation"

• Engine cover: Refer to

EM-22, "Exploded View"

• Battery and battery tray: Refer to

PG-82, "Exploded View"

• Air duct (inlet), resonator, air duct, and air cleaner case assembly: Refer to

EM-24, "Exploded View"

• Radiator hose (upper and lower): Refer to

CO-14, "Exploded View"

• Exhaust front tube: Refer to

EX-5, "Exploded View"

• Radiator cooling fan assembly: Refer to

CO-17, "Exploded View"

• Alternator: Refer to

CHG-30, "Exploded View"

Engine Room LH

Disconnect all connections of engine harness around the battery, and then temporarily secure the engine
harness into the engine side.

CAUTION:

Protect connectors using a resin bag against foreign materials during the operation.

Disconnect fuel feed tube at engine side. Refer to

EM-35, "Exploded View"

Disconnect heater hoses. Refer to

CO-23, "Exploded View"

Disconnect control cable from transaxle. (CVT models) Refer to

TM-219, "Exploded View"

Disconnect control linkage from transaxle. (M/T models) Refer to

TM-19, "Exploded View"

Remove EVAP hoses. Refer to

EM-26, "Exploded View"

Disconnect clutch tube on transaxle side from clutch damper. (M/T models) Refer to

CL-15, "Exploded

View"

Engine Room RH

Disconnect vacuum hose from intake manifold. Refer to

EM-26, "Exploded View"

Remove A/C compressor. (with A/C models) Refer to

HA-31, "Exploded View"

Remove ground cable at engine side.

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