NISSAN LATIO 2010 Service Repair Manual

EM-72
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OIL SEAL
1. Apply the liquid gasket lightly to ent
ire outside area of new rear oil seal.
Use Genuine Silicone RTV Seal ant or equivalent. Refer to GI-42, "
Recommended Chemical Prod-
uct and Sealant".
2. Install rear oil seal so that each seal lip is oriented as shown.
• Press-fit rear oil seal with a drift (a) outer diameter 113 mm(4.45 in) and inner diameter 90 mm (3.54 in).
CAUTION:
• Be careful not to damage crankshaft and cylinder block.
• Press-fit oil seal straight to avoid causing burrs or tilt-ing.
• Never touch grease applied onto oil seal lip.
• Press in rear oil seal (1) to the position as shown.
3. After press-fitting rear oil seal, completely wipe off any liquid gasket protruding to rear end surface side.
4. Installation of the remaining components is in the reverse order of removal.
A : Dust seal lip
B : Oil seal lip
: Engine outside
: Engine inside
PBIC3485J
PBIC3660E
A : Rear end surface of cylinder block
PBIC3761E
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CYLINDER HEAD
Removal and InstallationINFOID:0000000005398073
REMOVAL
WARNING:
• Put a “CAUTION: FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventila
ted area and furnish workshop with a CO
2 fire extinguisher.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
1. Release fuel pressure. Refer to EC-496, "
Inspection".
2. Drain engine coolant and engine oil. Refer to CO-12, "
Changing Engine Coolant" and LU-8, "Draining".
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant and engine oil on drive belt.
3. Remove the following components and related parts. • Front fender protector (RH). Refer to EI-24, "
Removal and Installation".
• Generator. Refer to SC-25, "
Removal and Installation".
• Exhaust front tube. Refer to EX-6, "
Component".
• Exhaust manifold. Refer to EM-31, "
Exploded View".
• Intake manifold. Refer to EM-28, "
Exploded View".
• Fuel tube and fuel injector. Refer to EM-34, "
Exploded View".
• Water outlet. Refer to CO-25, "
Removal and Installation".
• Drive belt. Refer to EM-15, "
Removal and Installation".
• Front cover. Refer to EM-49, "
Exploded View".
• Camshaft. Refer to EM-59, "
Exploded View".
• Air cleaner assembly. Refer to EM-26, "
Removal and Installation".
1. Cylinder head assembly 2. Cylinder head bolt3. Washer
4. Cylinder head gasket A. Refer to EM-73
PBIC3731E
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EM-74
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CYLINDER HEAD
4. Remove cylinder head loosening bolts in reverse order as
shown.
5. Remove cylinder head gasket.
INSPECTION AFTER REMOVAL
Cylinder Head Bolt s 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 appear s 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 checking. Refer to EM-116, "
Cylinder
Block".
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 passag es for engine oil or engine coolant.
2. At each of several locations on bottom surface of cylinder head, measure the distortion in six directions.
• If it exceeds the limit, replace cylinder head.
INSTALLATION
1. Install new cylinder head gasket.
A : EXH side
B: INT side
: Engine front
PBIC3732E
Limit [(d1) –— d2)]: 0.15 mm (0.0059 in)
PBIC3717E
A : Straight edge
B : Feeler gauge
Limit : Refer to EM-114, "Cylinder Head".
PBIC3207J
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2. Tighten cylinder head bolts in numer
ical order as shown with the
following procedure to install cylinder head.
CAUTION:
If cylinder head bolts are re-used, check their outer diame-
ters before installation. Fol low the “Cylinder Head Bolts
Outer Diameter” measurement procedure.
a. Apply new engine oil to threads and seating surfaces of bolts.
b. Tighten all bolts in the specified order.
c. Turn all bolts 60 degrees clockwise (angle tightening) using Tool (A) in the specified order.
CAUTION:
Check and confirm the tightening angle by using Tool (A) or
protractor. Avoid judgment by visual inspection without the
tool.
d. Completely loosen all bolts in reverse order. CAUTION:
In this step, loosen bolts in reverse order of that indicated.
e. Tighten all bolts in the specified order.
f. Turn all bolts 75 degrees clockwise (angle tightening) using Tool (A) in the specified order.
CAUTION:
Check and confirm the tightening angle by using Tool (A) or
protractor. Avoid judgment by visual inspection without the
tool.
g. Turn all bolts 75 degrees clockwise again (angle tightening) using Tool (A) in the specified order.
CAUTION:
Check and confirm the tightening angle by using To ol (A) or protractor. Avoid judgment by visual
inspection without the tool.
3. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
• Before starting engine, check oil/fluid levels incl uding engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-14, "
Fluids and Lubricants".
A : EXH side
B : INT side
: Engine front
: 40.0 N·m (4.1 kg-m, 30 ft-lb)
Tool number : KV10112100 (BT-8653-A)
PBIC3732E
PBIC3733E
: 0 N·m (0 kg-m, 0 ft-lb)
: 40.0 N·m (4.1 kg-m, 30 ft-lb)
Tool number : KV10112100 (BT-8653-A)
PBIC3733E
Revision: January 20102010 Versa

EM-76
< ON-VEHICLE REPAIR >[HR16DE]
CYLINDER HEAD
• 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, che ck again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids includ- ing 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:
*: Transaxle fluid, power steering fluid, brake fluid, etc.
Disassembly and AssemblyINFOID:0000000005398074
DISASSEMBLY
Items Before starting engine Engine runningAfter engine stopped
Engine coolant LevelLeakage Level
Engine oil LevelLeakage Level
Other oils and fluid* LevelLeakage Level
Fuel LeakageLeakageLeakage
Exhaust gases —Leakage —
1. Spark plug 2. Valve collet3. Valve spring retainer
4. Valve spring 5. Valve spring seat6. Valve oil seal
7. Valve guide (EXH) 8. Valve guide (INT)9. Cylinder head
10. Valve seat (EXH) 11. Valve (EXH)12. Valve seat (INT)
13. Valve (INT)
A. Refer to Installation procedure B. Refer to Installation procedure
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1. Remove spark plug using suitable tool.
2. Remove valve lifter.
• Identify installation positions, and store them without mixing them up.
3. Remove valve collet. • Compress valve spring with Tool (A). Remove valve collet witha magnet tool (B).
CAUTION:
Be careful not to damage valve lifter holes.
4. Remove valve spring retainer and valve spring.
5. Push valve stem to combustion chamber side, and remove valve. • Identify installation positions, and store them without mixing them up.
6. Remove valve oil seal using Tool (A).
7. Remove valve spring seat.
8. Remove valve seat, if necessary. • Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seatrecess in cylinder head. Set the machine depth stop to ensure this.
CAUTION:
Never bore excessively to prevent cylinder head from scratching.
9. Remove valve guide, if necessary.
a. To remove valve guide, heat cylinder head to 110 to 130 °C (230
to 266 °F) by soaking in heated oil (A).
Tool number : KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — )
PBIC3727E
Tool number : KV10107902 (J-38959): KV10116100 ( — )
PBIC3728E
JPBIA0184ZZ
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EM-78
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CYLINDER HEAD
b. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 lmp ton) pressure] or a hammer and the valve guide
drift.
WARNING:
Cylinder head contains heat . Wear protective equipment to
avoid getting burned.
INSPECTION AFTER DISASSEMBLY
Valve Dimensions
• Check the dimensions of each valve. For the dimensions, refer to EM-114, "Cylinder Head".
• If dimensions are out of the standard, replace valve and check 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.
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 even after the re-check, replace
valve seat. Refer to EM-76, "
Disassembly and Assembly".
Valve Spring Squareness
SEM931C
Standard : Refer to EM-114, "Cylinder Head".
Standard : Refer to EM-114, "
Cylinder Head".
Standard and Limit : Refer to EM-114, "
Cylinder Head".
PBIC3213J
A: OK
B: NGJPBIA0187ZZ
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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 the valve spring pressure at specified spring height.
• If the installation load or load with valve open is out of the stan- dard, replace valve spring.
ASSEMBLY
1. Install the valve guide, if necessary. CAUTION:
Replace with oversize [0.2 mm (0.008 in)] valve guide.
a. Using suitable tool (A), ream cylinder head valve guide hole.
b. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil (A).
B: Contact
Limit : Refer to EM-114, "Cylinder Head".
PBIC3219J
Standard : Refer to EM-114, "Cylinder Head".
Standard : Refer to EM-114, "
Cylinder Head".
SEM113
For service parts: Oversized [0.2 mm (0.008 in)]
Refer to EM-114, "
Cylinder Head".
PBIC3215J
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EM-80
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CYLINDER HEAD
c. Using suitable tool, press valve guide (1) from camshaft side to
the dimensions as shown.
WARNING:
Cylinder head (2) contains h eat. Wear protective equipment
to avoid getting burned.
d. Using suitable tool (A), apply reamer finish to valve guide.
2. Install the valve seat, if necessary. CAUTION:
Replace with oversize [0.5 mm (0.020 in)] valve seat.
a. Ream cylinder head recess diameter (a) for service valve seat.
• Be sure to ream in circles concentric to valve guide center.This will enable valve to fit correctly.
b. Heat cylinder head to 110 to 130° C (230 to 266°F) by soaking in
heated oil (A).
c. Use dry ice to thoroughly cool valve seats. Force fit valve seat into cylinder head. WARNING:
• Cylinder head contains heat. Wear prot ective equipment to avoid getting burned.
• Avoid directly touching cold valve seats. Projection “H”: Refer to
EM-114, "
Cylinder Head".
PBIC3217J
Standard: Refer to EM-114, "Cylinder Head".
PBIC3215J
For service parts: Oversize [0.5 mm (0.020 in)]
Refer to EM-114, "
Cylinder Head".
JPBIA0188ZZ
PBIC3214J
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d. Using suitable tool or valve seat grinder, finish seat to the speci-
fied dimensions. Refer to EM-114, "
Cylinder Head".
CAUTION:
When using the valve seat cutter, firmly grip cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cu t in a single drive. Improper
pressure on with cutter or cu tting 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-76, "
Disassembly and Assembly".
3. Install valve oil seal. • Install with Tool (A) to match dimension as shown.
4. Install valve spring seat.
5. Install valve. • Install larger diameter to intake side.
6. Install valve spring. NOTE:
It can be installed in either direction.
7. Install valve spring retainer.
8. Install valve collet. • Compress valve spring with Tool (A). Install valve collet with amagnet hand (B).
CAUTION:
Be careful not to damage valve lifter holes.
• Tap valve stem edge lightly with a plastic hammer after instal-
lation to check its installed condition.
9. Install valve lifter.
10. Install spark plug with a suitable tool.
SEM934C
Height “H” : 13.2 - 13.8 mm (0.520 - 0.543 in)
Tool number : KV10115600 (J-38958)
PBIC3211J
Tool number : KV10116200 (J-26336-B) : KV10115900 (J-26336-20)
: KV10109220 ( — )
PBIC3727E
Revision: January 20102010 Versa