engine NISSAN LATIO 2008 Service Repair Manual

CAMSHAFT
EM-47
< SERVICE INFORMATION >
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CAMSHAFT
ComponentINFOID:0000000001702495
Removal and InstallationINFOID:0000000001702496
REMOVAL
WARNING:
• Put a “CAUTION: FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventilated 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 the fuel pressure. Refer to EC-78, "
Fuel Pressure Check".
2. Disconnect negative battery cable. Refer to SC-6, "
Removal and Installation".
3. Remove front RH wheel. Refer to WT-6
.
4. Remove front fender protector (RH). Refer to EI-23
.
5. Drain engine coolant. Refer to CO-8
.
NOTE:
Perform this step when engine is cold.
6. Remove the following parts.
• Intake manifold; Refer to EM-18
.
• Rocker cover; Refer to EM-30
.
1. O-ring 2. Camshaft position sensor (PHASE) 3. Camshaft bracket
4. Camshaft sprocket (EXH) 5. Camshaft sprocket (INT) 6. Camshaft (EXH)
7. Camshaft (INT) 8. Valve lifter (EXH) 9. Valve lifter (INT)
10. Cylinder head
A. Refer to EM-47
.
PBIC4589E

EM-48
< SERVICE INFORMATION >
CAMSHAFT
• Fuel tube and fuel injector assembly; Refer to EM-33.
• Front cover, timing chain and related parts; Refer to EM-37
.
7. Remove camshaft position sensor (PHASE) from camshaft bracket.
CAUTION:
• Handle carefully to avoid dropping and shocks.
• Never disassemble.
• Never allow metal powder to adhere to magnetic part at sensor tip.
• Never place sensor in a location where it is exposed to magnetism.
8. Put the matching mark (A) on the camshaft sprocket (INT) (2)
and the camshaft bracket (1) as shown.
NOTE:
It prevents the knock pin of the camshaft (INT) from engaging
with the incorrect pin hole when installing the camshaft sprocket
(INT).
9. Remove camshaft sprockets (INT) (1) and (EXH) (2).
• Secure hexagonal part (A) of camshaft with a wrench. Loosen
camshaft sprocket bolts and remove camshaft sprocket.
CAUTION:
• Never rotate crankshaft or camshaft while timing chain
is removed. It causes interference between valve and
piston.
• Never loosen the bolts with securing anything other
than the camshaft hexagonal part or with tensioning the
timing chain.
10. Loosen bolts in reverse order as shown.
11. Cut liquid gasket by prying the position ( ) shown, and then
remove the camshaft bracket.
CAUTION:
• Be careful not to damage the mating surface.
• A more adhesive liquid gasket is applied compared to pre-
vious types when shipped, so it should not be forced off
the position not specified.
12. Remove camshafts.
: Engine front
PBIC3992J
PBIC3454J
: Engine front
PBIC3176J
: Engine front
PBIC3358J

EM-52
< SERVICE INFORMATION >
CAMSHAFT
• Clean camshaft journal to remove any foreign material.
• Distinguish between the intake and the exhaust by looking at
the different shapes of the front and rear ends of the camshaft
or using the identification colors (A) and (B).
• Install camshafts so that camshaft dowel pins (A) on the front
side are positioned as shown.
NOTE:
Though camshaft does not stop at the positions as shown, for
the placement of cam nose, it is generally accepted camshaft
is placed for the same direction as shown.
3. Remove foreign material completely from camshaft bracket backside and from cylinder head installation
face.
4. Apply liquid gasket (A) to camshaft bracket as shown.
Use Genuine Silicone RTV Sealant or equivalent. Refer to
GI-42, "
Recommended Chemical Product and Sealant".
1 : Camshaft (EXH)
2 : Camshaft (INT)
Identification color A B
Camshaft (EXH) — Yellow
Camshaft (INT) Yellow —
PBIC3188J
1 : Camshaft (EXH)
2 : Camshaft (INT)
PBIC3189J
Tool number WS39930000 ( – )
B : Plug hole inner wall
: Engine front
: Engine outside
PBIC3964E

CAMSHAFT
EM-53
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5. Install camshaft bracket bolts in three stage in numerical order
as shown in numerical order as shown.
• There are two types of bolts. Locate the bolts as shown.
6. Tighten all bolts in numerical order in three steps.
7. Install the camshaft sprocket (INT) to the camshaft (INT).
NOTE:
When the camshaft sprocket (INT) (2) is removed, align the
paint mark (A) put according to step “3”. Securely align the
knock pin and the pin hole, and then install them.
8. Tighten camshaft (INT) sprocket bolt.
NOTE:
Secure the hexagonal part of camshaft (INT) using wrench to tighten bolt.
9. Turn 67 degrees clockwise (angle tightening) using Tool.
CAUTION:
Never judge by visual inspection without an angle wrench.
: Engine front
M6 bolts [thread length: 57.5 mm (2.264 in)]
: 13, 14 and 15 as shown
M6 bolts [thread length: 35.00 mm (1.378 in)]
: Except the above
Step 1 : 1.96 N·m (0.20 kg-m, 17 in-lb)
Step 2 : 5.88 N·m (0.60 kg-m, 52 in-lb)
Step 3 : 9.5 N·m (0.97 kg-m, 84 in-lb)
1 : Camshaft bracket
: Engine front
PBIC3176J
PBIC3992J
Camshaft sprocket bolt (INT) : 35.0 N·m (3.6 kg-m, 26 ft-lb)
1 : Camshaft sprocket (INT)
A : Camshaft (INT) hexagonal part
Tool number : KV10112100 (BT-8653-A)
PBIC3455J

EM-54
< SERVICE INFORMATION >
CAMSHAFT
10. Install camshaft sprocket (EXH) (2).
NOTE:
Secure the hexagonal part (A) of camshaft (EXH) using wrench
to tighten bolt.
11. Install timing chain and related parts. Refer to EM-37
.
12. Inspect and adjust valve clearance. Refer to EM-55, "
Valve Clearance".
13. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
The following are procedures for checking fluids leak, lubricates leak.
• 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 GI-42, "
Recommended Chemical Product and Sealant".
• 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.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in the guide may
generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after
hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, 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:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:
• Perform this inspection only when DTC P0011 is detected in self-diagnostic results of CONSULT-III
and it is directed according to inspection procedure of EC section. Refer to EC-46
.
• Check when engine is cold so as to prevent burns from the splashing engine oil.
1. Check engine oil level. Refer to LU-6, "
Inspection".
2. Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a. Remove intake manifold. Refer to EM-18, "
Component".
b. Disconnect ignition coil and injector harness connectors.
3. Remove intake valve timing control solenoid valve. Refer to EM-37, "
Component".
1 : Camshaft sprocket (INT)
Camshaft sprocket
bolt (EXH): 88.2 N·m (9.0 kg-m, 65 ft-lb)
PBIC3454J
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

CAMSHAFT
EM-55
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4. Clean the mating area of intake valve timing control solenoid
valve. Insert a clean shop cloth (with no oil adhesion) into the oil
hole (A) of the cylinder head.
5. Install engine mounting bracket (RH), engine mounting insulator,
and torque rod (RH) under the Step 4 condition. (With intake
valve timing control solenoid valve removed, and a shop cloth
inserted into the oil hole.) Refer to EM-72, "
Component".
6. Crank engine, and then make sure that engine oil comes out
from intake valve timing control solenoid valve hole (A). End crank after checking.
• Check engine oil leakage by oil amount adhered to the waste inserted into the oil hole.
WARNING:
Be careful not to touch rotating parts (drive belts, idler pulley, and crankshaft pulley, etc.).
CAUTION:
• Do not perform cranking without installing right engine mount bracket, right engine mount insu-
lator, and right torque rod.
• Prevent splashing by using a shop cloth so as to prevent the worker from injury from engine oil
and so as to prevent engine oil contamination.
• Prevent splashing by using a shop cloth so as to prevent engine oil from being splashed to
engine and vehicle. Especially, be careful not to apply engine oil to rubber parts of drive belts,
engine mounting insulator, etc. Wipe engine oil off immediately if it is splashed.
7. Perform the following inspection if engine oil does not come out from intake valve timing control solenoid
valve oil hole of the cylinder head.
• Remove oil filter (for intake valve timing control), and then clean it. Refer to EM-76, "
Component".
• Clean oil groove between oil strainer and intake valve timing control solenoid valve. Refer to LU-5
.
8. Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT),
and then check each oil groove for clogging.
• Clean oil groove if necessary. Refer to LU-5
.
9. Installation of the remaining components is in the reverse order of removal
Valve ClearanceINFOID:0000000001702497
INSPECTION
Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance.
1. Remove rocker cover. Refer to EM-30
.
2. Measure the valve clearance with the following procedure:
a. Set No. 1 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley (1) clockwise and align TDC mark (no paint) (B) to timing indicator (A) on front
cover.
1 : Front cover
:Vehicle front
WBIA0781E
C : White paint mark (Not use for service)
PBIC3960E

EM-56
< SERVICE INFORMATION >
CAMSHAFT
• At the same time, make sure that both intake and exhaust cam
noses of No. 1 cylinder face inside ( ) as shown.
• If they do not face inside, rotate crankshaft pulley once more
(360 degrees) and align as shown.
b. Use a feeler gauge, measure the clearance between valve lifter
and camshaft.
Valve clearance:
Unit: mm (in)
*: Approximately 80°C (176°F)
• By referring to the figure, measure the valve clearances at
locations marked “×” as shown in the table below [locations
indicated with black arrow ( )] with a feeler gauge.
• No. 1 cylinder compression TDC
c. Set No.4 cylinder at TDC of its compression stroke.
1 : Camshaft (INT)
2 : Camshaft (EXH)
: Engine front
PBIC3359J
PBIC3192J
Cold Hot * (reference data)
Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 - 0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.017)
Measuring position No. 1 CYL. No. 2 CYL. No. 3 CYL. No. 4 CYL.
No. 1 cylinder at
compression TDCEXH× ×
INT× ×
A : Exhaust side
B : No.1 cylinder
C : No.2 cylinder
D : No.3 cylinder
E : No.4 cylinder
F: Intake side
: Engine front
PBIC3193J

CAMSHAFT
EM-57
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• Rotate crankshaft pulley (1) one revolution (360 degrees) and
align TDC mark (no paint) (B) to timing indicator (A) on front
cover.
• By referring to the figure, measure the valve clearance at loca-
tions marked “×” as shown in the table below [locations indi-
cated with black arrow ( )] with a feeler gauge.
• No. 4 cylinder compression TDC
3. If out of standard, perform adjustment.
ADJUSTMENT
• Perform adjustment depending on selected head thickness of valve lifter.
1. Remove camshaft. Refer to EM-47, "
Removal and Installation".
2. Remove valve lifters at the locations that are out of the standard.
3. Measure the center thickness of the removed valve lifters with a
micrometer (A).
4. Use the equation below to calculate valve lifter thickness for replacement.
C : White paint mark (Not use for service)
PBIC3960E
Measuring position No. 1 CYL. No. 2 CYL. No. 3 CYL. No. 4 CYL.
No. 4 cylinder at
compression TDCEXH × ×
INT × ×
A : Exhaust side
B : No.1 cylinder
C : No.2 cylinder
D : No.3 cylinder
E : No.4 cylinder
F : Intake side
: Engine front
PBIC3194J
PBIC3195J
Valve lifter thickness calculation: t = t1 + (C1 – C2)
t = Valve lifter thickness to be replaced
t
1 = Removed valve lifter thickness
C
1= Measured valve clearance
C
2= Standard valve clearance:

OIL SEAL
EM-59
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OIL SEAL
Removal and Installation of Valve Oil SealINFOID:0000000001702498
REMOVAL
1. Remove camshafts. Refer to EM-47, "Component".
2. Remove valve lifters. Refer to EM-47
.
3. Rotate crankshaft, and set piston whose valve oil seal is to be removed to TDC. This will prevent valve
from dropping into cylinder.
CAUTION:
When rotating crankshaft, be careful to avoid scarring front cover with timing chain.
4. Remove valve collet.
• Compress valve spring using Tool, the attachment and the
adapter (A). Remove valve collet with a suitable magnet hand
(B).
CAUTION:
When working, be careful not to damage valve lifter holes.
5. Remove valve spring retainer, valve spring and valve spring seat.
6. Remove valve oil seal using Tool (A).
INSTALLATION
1. Apply new engine oil to valve oil seal joint surface and seal lip.
2. Press in valve oil seal to the height “H” shown using Tool (A).
3. Installation of the remaining components is in the reverse order of removal.
Removal and Installation of Front Oil SealINFOID:0000000001702499
REMOVAL
1. Remove the following parts.
• Front fender protector (RH); Refer to EI-23
. Tool number : KV101092S0 (J-26336-B)
PBIC3727E
Tool number :KV10107902 (J-38959)
PBIC3728E
Height “H” : 15.1 - 15.7 mm (0.594 - 0.618 in)
Tool number : KV10115600 ( — )
PBIC3211J

EM-60
< SERVICE INFORMATION >
OIL SEAL
• Drive belt; Refer to EM-13, "Component".
• Crankshaft pulley; Refer to EM-37, "
Component".
2. Remove front oil seal using a suitable tool.
CAUTION:
Be careful not to damage front cover and crankshaft.
INSTALLATION
1. Apply new engine oil to new front oil seal joint surface and seal lip.
2. Install front oil seal so that each seal lip is oriented as shown.
• Install front oil seal (2) using a suitable tool with outer diameter
57 mm (2.24 in) and inner diameter 45 mm (1.77 in) (A) to the
dimension as shown.
CAUTION:
• Be careful not to damage front cover and crankshaft.
• Press-fit oil seal straight to avoid causing burrs or tilt-
ing.
• Do not touch grease applied on oil seal lip.
3. Installation of the remaining components is in the reverse order of removal.
Removal and Installation of Rear Oil SealINFOID:0000000001702500
REMOVAL
1. Remove transaxle assembly. Refer to MT-16 (M/T models), AT-226 (A/T models) or CVT-178 (CVT
models).
2. Remove clutch cover and clutch disk (M/T models). Refer to CL-13
.
3. Remove drive plate (A/T or CVT models) or flywheel (M/T models). Refer to EM-76, "
Component".
4. Remove rear oil seal with a suitable tool.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
INSTALLATION
1. Apply the liquid gasket lightly to entire outside area of new rear oil seal.
Use Genuine Silicone RTV Sealant or equivalent. Refer to GI-42, "
Recommended Chemical Prod-
uct and Sealant".
A : Dust seal lip
B : Oil seal lip
: Engine outside
: Engine inside
PBIC3485J
Within 0.3 mm (0.012 in) toward engine front
Within 0.5 mm (0.020 in) toward engine rear
PBIC3729E