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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
Page 1690 of 2771

DRIVE BELTS
EM-13
< SERVICE INFORMATION >
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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
Page 1691 of 2771

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
Page 1692 of 2771
DRIVE BELTS
EM-15
< SERVICE INFORMATION >
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Use TORX socket (size T50).
4. Remove idler pulley and bracket (models without A/C).
INSTALLATION
Installation is the reverse order of removal.
CAUTION:
• When installing drive belt auto-tensioner, be careful not to interfere with water pump pulley.
• If there is damage greater than peeled paint, replace drive belt auto-tensioner and/or idler pulley.
Page 1693 of 2771

EM-16
< SERVICE INFORMATION >
AIR CLEANER AND AIR DUCT
AIR CLEANER AND AIR DUCT
ComponentINFOID:0000000001702480
Removal and InstallationINFOID:0000000001702481
REMOVAL
1. Remove the air duct (inlet).
2. Remove the air cleaner filter from the air cleaner case. Refer to EM-17, "
Changing Air Cleaner Filter".
3. Remove the air duct [between air duct (inlet) and air cleaner case] from the air cleaner case.
4. Remove the PCV hose.
5. Remove the air duct (between air cleaner case and electronic throttle control actuator).
• Add marks as necessary for easier installation.
6. Remove air cleaner case with the following procedure.
a. Remove battery. Refer to SC-4
.
b. Disconnect harness connector from mass air flow sensor.
c. Remove the air cleaner case.
7. Remove the mass air flow sensor from the air cleaner case, if necessary.
CAUTION:
• Handle it carefully and avoid impacts.
• Do not touch sensor part.
INSTALLATION
Installation is in the reverse order of removal.
1. Air cleaner filter 2. Holder 3. Air cleaner cover
4. Seal 5. Mass air flow sensor 6. Air duct
7. PCV hose 8. Air duct (Inlet) 9. Air duct (Front)
10. Clip 11. Resonator 12. Grommet
13. Air cleaner case A. To electronic throttle control actuator B. To rocker cover
WBIA0770E
Page 1694 of 2771
AIR CLEANER AND AIR DUCT
EM-17
< SERVICE INFORMATION >
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• Align marks.
• Attach each joint securely.
• Screw clamps firmly.
Changing Air Cleaner FilterINFOID:0000000001702482
REMOVAL
1. Push the tabs (A) of both ends of the air cleaner cover (1) into
the inside (B).
2. Pull up the air cleaner cover forward (C) and remove it.
3. Remove the air cleaner filter (1) and holder (2) assembly from
the air cleaner case.
4. Remove the air cleaner filter from the holder.
INSPECTION AFTER REMOVAL
It is necessary to replace it at the recommended intervals, more often under dusty driving conditions. Refer to
MA-6
.
INSTALLATION
Installation is in the reverse order of removal.
• Install the air cleaner cover (1) in the direction shown.
• Air cleaner filter (2)
• Holder (3)
PBIC3557J
PBIC3558J
PBIC3559J
Page 1695 of 2771
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
Page 1696 of 2771
INTAKE MANIFOLD
EM-19
< SERVICE INFORMATION >
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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