2008 NISSAN LATIO engine

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-11
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine NoiseINFOID:0000000001702472
WBIA0769E
1. Piston pin noise 2. Piston slap noise 3. Main bearing noise
4. Water pump noise 5. Timing chain and tensioner noise 6. Drive belt noise (stick/slipping)
7. Tappet noise 8. Camshaft bearing noise 9. Connecting rod noise
A. Rotational mechanism B. Water pump C. Timing chain

EM-12
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Use the Chart Below to Help You Find the Cause of the Symptom
INFOID:0000000001702473
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
A: Closely related B: Related C: Sometimes related —: Not relatedD. Drive belt E. Crankshaft pulley F. A/C compressor
G. Water pump H. Generator I. Tension pulley
J. Valve mechanism K. Valves
Location
of noiseTyp e of
noiseOperating condition of engine
Source of
noiseCheck itemRefer-
ence page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driving
Top of en-
gine
Rocker
cover
Cylinder
headTicking or
clickingCA—AB—Tappet
noiseValve clearanceEM-104
Rattle C A — A B CCamshaft
bearing
noiseCamshaft journal oil
clearance
Camshaft runoutEM-47EM-47
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil panSlap or
knock—A—BB—Piston pin
noisePiston to piston pin oil
clearance
Connecting rod bushing
oil clearanceEM-93
EM-93
Slap or
rapA——BBAPiston
slap noisePiston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-93EM-93
EM-93
EM-93
Knock A B C B B BConnect-
ing rod
bearing
noiseConnecting rod bushing
oil clearance
Connecting rod bearing
oil clearanceEM-93EM-93
Knock A B — A B CMain bear-
ing noiseMain bearing oil clear-
ance
Crankshaft runoutEM-93EM-93
Front of
engine
Front cov-
erTapping or
tickingAA—BBBTiming
chain and
chain ten-
sioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-38
Front of
engineSqueak-
ing or fizz-
ingAB—B—CDrive belt
(Sticking
or slip-
ping)Drive belt deflection
EM-13
Creaking A B A B A BDrive belt
(Slipping)Idler pulley bearing op-
eration
Squall
CreakAB—BABWater
pump
noiseWater pump operationCO-16

DRIVE BELTS
EM-13
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
DRIVE BELTS
ComponentINFOID:0000000001702474
Checking Drive BeltsINFOID:0000000001702475
WARNING:
Be sure to perform this step when the engine is stopped.
• Make sure that the indicator (notch on fixed side) of drive belt auto-tensioner is within the possible use range
(A).
NOTE:
• Check the drive belt auto-tensioner indication when the engine is cold.
• When new drive belt is installed, the indicator (notch on fixed side) should be within the range (B).
• Visually check entire drive belt for wear, damage or cracks.
• If the indicator (notch on fixed side) is out of the possible use range or belt is damaged, replace drive belt.
Tension AdjustmentINFOID:0000000001702476
Belt tension is not necessary, as it is automatically adjusted by drive belt auto-tensioner.
Removal and InstallationINFOID:0000000001702477
REMOVAL
1. Hold the hexagonal part (A) of drive belt auto-tensioner (1) with
a wrench securely. Then move the wrench handle in the direc-
tion of arrow (loosening direction of tensioner).
CAUTION:
Never place hand in a location where pinching may occur if
the holding tool accidentally comes off.
2. Insert a rod such as short-length screwdriver approximately 6
mm (0.24 in) in diameter into the hole (B) of the retaining boss to
fix drive belt auto-tensioner.
3. Remove drive belt.
INSTALLATION
1. Generator 2. Drive belt auto–tensioner 3. Crankshaft pulley
4.A/C compressor (models with A/C)
Idler pulley (models without A/C)5. Water pump 6. Drive belt
A. Possible use range B. Range when new drive belt is installed C. Indicator
PBIC3137J
PBIC3936E

EM-14
< SERVICE INFORMATION >
DRIVE BELTS
1. Hold the hexagonal part (A) of drive belt auto-tensioner (1) with
a box wrench securely. Then move the wrench handle in the
direction of arrow (loosening direction of tensioner).
CAUTION:
Never place hand in a location where pinching may occur if
the holding tool accidentally comes off.
2. Insert a rod such as short-length screwdriver approximately 6
mm (0.24 in) in diameter into the hole (B) of retaining boss to fix
drive belt auto-tensioner.
3. Install drive belt.
CAUTION:
• Confirm drive belt is completely set to pulleys.
• Check for engine oil, working fluid and engine coolant are not adhered to drive belt and each
pulley groove.
4. Release drive belt auto-tensioner, and apply tension to drive belt.
5. Turn crankshaft pulley clockwise several times to equalize tension between each pulley.
6. Confirm tension of drive belt at indicator (notch on fixed side) is within the possible use range. Refer to
EM-13, "
Checking Drive Belts".
ComponentINFOID:0000000001702478
Removal and Installation of Drive Belt Auto TensionerINFOID:0000000001702479
REMOVAL
1. Remove drive belt. Refer to EM-13, "Removal and Installation".
2. Release the fixed drive belt auto-tensioner pulley.
3. Loosen bolt and remove drive belt auto-tensioner.
NOTE:
PBIC3936E
1. Front cover 2. Drive belt auto–tensioner 3. Idler pulley (models without A/C)
4. Bracket (models without A/C) 5. Shaft (models without A/C)
PBIC4698E

EM-18
< SERVICE INFORMATION >
INTAKE MANIFOLD
INTAKE MANIFOLD
ComponentINFOID:0000000001702483
Removal and InstallationINFOID:0000000001702484
REMOVAL
1. Remove engine cover (1).
2. Drain engine coolant. Refer to CO-8, "
Changing Engine Cool-
ant".
CAUTION:
Perform this step when engine is cold.
NOTE:
This step is unnecessary when putting plugs to water hoses (to
electronic throttle control actuator)
a. Disconnect water hoses from electronic throttle control actuator.
b. Remove electronic throttle control actuator.
CAUTION:
• Handle carefully to avoid any shock to electronic throttle
control actuator.
• Never disassemble.
3. Remove oil level gauge.
CAUTION:
Cover the oil level gauge guide openings to avoid entry of foreign materials.
1. PCV hose 2. Gasket 3. Intake manifold
4. Bracket 5. O-ring 6. EVAP canister purge volume control
solenoid valve
7. Water hose 8. Water hose 9. Electronic throttle control actuator
10. Gasket A. To water outlet
WBIA0771E
WBIA0845E

INTAKE MANIFOLD
EM-19
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
4. Loosen and remove intake manifold (1) bolts (A) (B).
5. Loosen bolts in reverse order as shown.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
6. Remove EVAP canister purge volume control solenoid valve
from intake manifold, if necessary.
CAUTION:
Handle it carefully and avoid impacts.
7. Remove intake manifold.
INSTALLATION
1. Install intake manifold.
NOTE:
Be sure the intake manifold gasket is seated correctly in groove of intake manifold.
2. Tighten bolts in numerical order as shown.
: Engine front
PBIC3939E
: Engine front
PBIC3527J
: Engine front
WBIA0788E

EM-20
< SERVICE INFORMATION >
INTAKE MANIFOLD
3. Tighten intake manifold bolt (A). Then tighten intake manifold
bolt (B).
4. Install electronic throttle control actuator
5. Install water hoses (3), (5) to electronic throttle control actuator
as shown.
6. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Check for leaks of engine coolant. Refer to CO-8, "Inspection".
• Start and warm up the engine. Visually check for engine coolant leaks.
1 : Intake manifold
: Engine front
PBIC3939E
1 : Electronic throttle control actuator
2: Clamp
4 : Water outlet
A: Paint Mark
B : The clamp shall not interfere with the bulged section.
PBIC4703E

EXHAUST MANIFOLD
EM-21
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EM
N
P O
EXHAUST MANIFOLD
ComponentINFOID:0000000001702485
Removal and InstallationINFOID:0000000001702486
REMOVAL
1. Remove exhaust front tube. Refer to EX-4, "Removal and Installation".
2. Remove exhaust manifold cover.
3. Remove the A/F sensor 1, using Tool (A).
CAUTION:
Handle it carefully and avoid impacts.
4. Remove exhaust manifold side bolt of exhaust manifold stay.
1. Exhaust manifold cover 2. Exhaust manifold 3. Gasket
4. Stud bolt 5. Bracket 6. A/F ratio sensor 1
7. Exhaust manifold stay Engine front
WBIA0778E
Tool number :KV991J0050 (J-44626)
WBIA0772E