2004 INFINITI FX35 Engine

EM-166
[VK45DE]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: 2004 November 2004 FX35/FX45
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting —Engine NoiseABS006I4
PBIC2330E

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-167
[VK45DE]
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Revision: 2004 November 2004 FX35/FX45
Use the Chart Below to Help You Find the Cause of the Symptom.ABS006I5
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 relatedLocation
of noiseTy p e o f
noiseOperating condition of engine
Source of
noiseCheck itemRefer-
ence page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driving
Top of
engine
Rocker
cover
Cylinder
headTicking or
clickingC A — A B — Tappet noise Valve clearanceEM-214
Rattle C A — A B CCamshaft
bearing noiseCamshaft journal oil
clearance
Camshaft runoutEM-210EM-209
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil panSlap or
knock—A—B B—Piston pin
noisePiston to piston pin oil
clearance
Connecting rod bush-
ing oil clearanceEM-256
EM-258
Slap or
rapA——BBAPiston slap
noisePiston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-260EM-257
EM-257
EM-258
Knock ABCBBBConnecting
rod bearing
noiseConnecting rod bush-
ing oil clearance
Connecting rod bear-
ing oil clearanceEM-258EM-263
Knock A B — A B CMain bearing
noiseMain bearing oil clear-
ance
Crankshaft runoutEM-264EM-262
Front of
engine
front coverTapping or
tickingAA—BBBTiming chain
and chain
tensioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-201
EM-196
Front of
engineSqueak-
ing or fizz-
ingAB—B—CDrive belts
(Sticking or
slipping)Drive belts deflection
EM-169Creaking A B A B A BDrive belts
(Slipping)Idler pulley bearing
operation
Squall
CreakAB—BABWater pump
noiseWater pump operationCO-49,
"WATER
PUMP"

EM-168
[VK45DE]
ENGINE ROOM COVER
Revision: 2004 November 2004 FX35/FX45
ENGINE ROOM COVERPFP:14049
Removal and InstallationABS006I6
REMOVAL
CAUTION:
Do not damage or scratch cover when installing or removing.

Major parts and inspection points under each cover are as follows; (numbered as in the figure)
INSTALLATION
Install in the reverse order of removal.
1. Engine cover 2. Battery cover 3. Air duct (inlet)
PBIC1540E
1 : Upper side of engine assembly and power steering reservoir tank
2 : Relay and battery
3 : Engine assembly front side, drive belts and cooling fan

DRIVE BELTS
EM-169
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Revision: 2004 November 2004 FX35/FX45
DRIVE BELTSPFP:02117
Checking Drive BeltsABS006I7
WARNING:
Be sure to perform when engine is stopped.

Remove air duct (inlet) when inspecting drive belt for alternator, water pump and A/C compressor.

Remove front engine undercover with power tool when inspecting power steering oil pump belt.

Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range
(between three line notches).
NOTE:

Check auto tensioner indication when engine is cold.

When new drive belt is installed, the range should be “A”.

The indicator notch is located on the moving side of auto tensioner for alternator, water pump and A/C
compressor belt, while it is found on the fixed side for power steering oil pump belt.

Visually check entire belt for wear, damage or cracks.

If the indicator is out of allowable working range or belt is damaged, replace belt.
Tension AdjustmentABS006I8
Belt tensioning is not necessary, as it is automatically adjusted by auto tensioner.
Removal and InstallationABS006I9
REMOVAL
Alternator, Water Pump and A/C Compressor Belt
1. Remove air duct (inlet). Refer to EM-172, "AIR CLEANER AND AIR DUCT" .
2. Front engine undercover with power tool.
3. With box wrench, and while securely holding the hexagonal part
in pulley center of auto tensioner, move wrench handle in the
direction of arrow (loosening direction of tensioner).
CAUTION:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
4. Under the above condition, insert a metal bar of approximately 6
mm (0.24 in) in diameter (hexagonal bar wrench shown as
example in the figure) through the holding boss to lock auto ten-
sioner pulley arm.

Leave auto tensioner pulley arm locked until belt is installed
again.
PBIC2331E
PBIC1542E

EM-170
[VK45DE]
DRIVE BELTS
Revision: 2004 November 2004 FX35/FX45
5. Remove alternator, water pump and A/C compressor belt.
Power Steering Oil Pump Belt
1. Remove air duct (inlet). Refer to EM-172, "AIR CLEANER AND AIR DUCT" .
2. Front engine undercover with power tool
3. Remove alternator, water pump and A/C compressor belt. Refer to EM-169, "
Alternator, Water Pump and
A/C Compressor Belt" .
4. While securely holding the hexagonal protrusion part of auto
tensioner pulley with box wrench, move wrench handle in the
direction of arrow (loosening direction of tensioner).
CAUTION:
Avoid placing hand in a location where pinching may occur
if holding tool accidentally comes off.
5. Under the above condition, insert a metal bar of approximately 6
mm (0.24 in) in diameter (hexagonal bar wrench shown as
example in the figure) through the holding boss to lock auto ten-
sioner pulley arm.

Leave auto tensioner pulley arm locked until belt is installed
again.
6. Remove power steering oil pump belt.
INSTALLATION
Note to the following, and install in the reverse order of removal.
CAUTION:

Make sure belt is securely installed around all pulleys.

Make sure belt is correctly engaged with the pulley groove.

Check for engine oil and engine coolant are not adhered belt and pulley groove.

Check that belt tension is within the allowable working range, using indicator notch on auto ten-
sioner. Refer to EM-169, "
Checking Drive Belts" .
PBIC1543E

DRIVE BELTS
EM-171
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Revision: 2004 November 2004 FX35/FX45
Drive Belt Auto Tensioner and Idler PulleyABS006IA
REMOVAL
1. Remove air duct (inlet). Refer to EM-172, "AIR CLEANER AND AIR DUCT" .
2. Front engine undercover with power tool.
3. Remove drive belts. Refer to EM-169, "
Removal and Installation" .

Keep auto tensioner pulley arm locked after belt is removed.
4. Remove auto tensioner and idler pulley with power tool.

Keep auto tensioner pulley arm locked to install or remove auto tensioner.
INSTALLATION
Install in the reverse order of removal.
PBIC1544E

EM-172
[VK45DE]
AIR CLEANER AND AIR DUCT
Revision: 2004 November 2004 FX35/FX45
AIR CLEANER AND AIR DUCTPFP:16500
Removal and InstallationABS006IB
REMOVAL
1. Remove engine cover with power tool. Refer to EM-168, "ENGINE ROOM COVER" .
2. Disconnect harness connector from mass air flow sensor.
3. Disconnect vacuum hose and PCV hose.
4. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly, air duct and resonator
assembly disconnecting their joints.

Add marks as necessary for easier installation.
5. Remove mass air flow sensor from air cleaner case.
CAUTION:
Handle mass air flow sensor with following cares.

Do not shock it.

Do not disassemble it.

Do not touch its sensor.
INSTALLATION
Note to the following, and install in the reverse order of removal.
1. Air duct and resonator assembly 2. Bracket 3. Vacuum hose
4. Mass air flow sensor 5. O-ring 6. Air cleaner case
7. Air cleaner filter 8. Cover 9. Air cleaner case
10. Resonator 11. Mounting rubber 12. Air duct (inlet)
13. Clip
PBIC1657E

EM-174
[VK45DE]
INTAKE MANIFOLD
Revision: 2004 November 2004 FX35/FX45
INTAKE MANIFOLDPFP:14003
Removal and InstallationABS006IC
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.
1. PCV tube 2. Engine cover rear bracket 3.EVAP canister purge control sole-
noid valve
4. EVAP hose 5. EVAP tube 6. EVAP hose
7. Vacuum gallery 8. Engine cover front bracket 9. Vacuum tank
10. VIAS control solenoid valve 11. Water gallery 12. Gasket
13. Intake manifold (lower) 14. Gasket 15. Water hose
16. Intake manifold adapter 17. Electric throttle control actuator 18. Gasket
19. Intake manifold (upper) 20. Resonator 21. EVAP service port
PBIC3502E