Nissan Cube. Manual — part 417
EM-72
< REMOVAL AND INSTALLATION >
CYLINDER HEAD
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
• 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
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
PBIC3207J
Standard and Limit: Refer to
PBIC3213J
A
: OK
JPBIA0187ZZ
CYLINDER HEAD
EM-73
< REMOVAL AND INSTALLATION >
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• 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.
B
: Contact
Limit
: Refer to
PBIC3219J
Standard
: Refer to
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
Leakage
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:
1.
Upper torque rod (RH)
2.
Washer
3.
Engine mounting insulator (RH)
4.
Engine mounting bracket (RH)
5.
Rear engine mounting bracket
6.
Washer
7.
Rear torque rod
8.
Engine mounting bracket (LH)
9.
Engine mounting bracket support
(LH)
10. Engine mounting insulator (LH)
A.
Front mark
B.
M/T models
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
JPBIA2912GB
ENGINE ASSEMBLY
EM-75
< UNIT REMOVAL AND INSTALLATION >
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• 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
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
1.
Release fuel pressure. Refer to
.
2.
Drain engine coolant from radiator. Refer to
.
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.
3.
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
• Battery and battery tray: Refer to
• Air duct (inlet), resonator, air duct, and air cleaner case assembly: Refer to
.
• Radiator hose (upper and lower): Refer to
.
• Exhaust front tube: Refer to
.
• Radiator cooling fan assembly: Refer to
• Alternator: Refer to
Engine Room LH
1.
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.
2.
Disconnect fuel feed tube at engine side. Refer to
3.
Disconnect heater hoses. Refer to
.
4.
Disconnect control cable from transaxle. (CVT models) Refer to
5.
Disconnect control linkage from transaxle. (M/T models) Refer to
6.
Remove EVAP hoses. Refer to
.
7.
Disconnect clutch tube on transaxle side from clutch damper. (M/T models) Refer to
.
Engine Room RH
1.
Disconnect vacuum hose from intake manifold. Refer to
.
2.
Remove A/C compressor. (with A/C models) Refer to
3.
Remove ground cable at engine side.
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