Page 3025 of 4331
EM-78< ON-VEHICLE REPAIR >
[HR16DE]
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
Page 3026 of 4331

EM
NP
O
CYLINDER HEAD
Removal and Installation INFOID:0000000004784305
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-498, " Inspection " .
2. Drain engine coolant and engine oil. Refer to CO-11, " Changing Engine Coolant " and
LU-8, " Draining " .
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant an d 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-5, " 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-24, " Removal and Installation " .
• Drive belt: Refer to EM-15, " Removal and Installation " .
• Front cover: Refer to EM-49, " Exploded View " .
• Camshaft: Refer to EM-58, " Exploded View " .
1. Cylinder head assembly 2. Cylinder head bolt 3. Washer
4. Cylinder head gasket A. Refer to EM-79
Page 3027 of 4331
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 Cylinder Head " .
Page 3028 of 4331
![NISSAN LATIO 2009 Service Repair Manual CYLINDER HEAD
EM-81
< ON-VEHICLE REPAIR >
[HR16DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
2. Tighten cylinder head bolts in numer
ical order as shown with the
following procedure to install cylinder head.
CA NISSAN LATIO 2009 Service Repair Manual CYLINDER HEAD
EM-81
< ON-VEHICLE REPAIR >
[HR16DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
2. Tighten cylinder head bolts in numer
ical order as shown with the
following procedure to install cylinder head.
CA](/manual-img/5/57359/w960_57359-3027.png)
CYLINDER HEAD
EM-81
< ON-VEHICLE REPAIR >
[HR16DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
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
Page 3029 of 4331
1. Spark plug 2. Valve collet 3. Valve spring retainer
4. Valve spring 5. Valve spring seat 6. 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
Page 3030 of 4331
![NISSAN LATIO 2009 Service Repair Manual CYLINDER HEAD
EM-83
< ON-VEHICLE REPAIR >
[HR16DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
1. Remove spark plug using suitable tool.
2. Remove valve lifter. • Identify installation positions, and store them NISSAN LATIO 2009 Service Repair Manual CYLINDER HEAD
EM-83
< ON-VEHICLE REPAIR >
[HR16DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
1. Remove spark plug using suitable tool.
2. Remove valve lifter. • Identify installation positions, and store them](/manual-img/5/57359/w960_57359-3029.png)
CYLINDER HEAD
EM-83
< ON-VEHICLE REPAIR >
[HR16DE] C
D E
F
G H
I
J
K L
M A EM
NP
O
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 s hould not continue beyond the bottom face of the seat
recess 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
Page 3031 of 4331

Cylinder Head " .
• If dimensions are out of the standard, r eplace 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 dimensi ons 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-82, " Disassembly and Assembly " .
Valve Spring Squareness Cylinder Head " .
Standard : Refer to EM-119, " Cylinder Head " .
Standard and Limit : Refer to EM-119, " Cylinder Head " .
Page 3032 of 4331
EM
NP
O
• 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-119, " Cylinder Head " .
Cylinder Head " .
Standard : Refer to EM-119, " Cylinder Head " .
Cylinder Head " .
PBIC3214J