2004 INFINITI FX35 Engine power steering

PR-4
FRONT PROPELLER SHAFT
Revision: 2004 November 2004 FX35/FX45
FRONT PROPELLER SHAFTPFP:37200
On-Vehicle ServiceADS000KL
PROPELLER SHAFT VIBRATION
If vibration is present at high speed, inspect propeller shaft runout first.
1. Measure propeller shaft runout at several points by rotating final
drive companion flange with your hands.
2. If runout still exceeds specifications, disconnect propeller shaft
at the final drive companion flange; then rotate companion
flange 90, 180, 270 degrees and reconnect propeller shaft.
3. Check runout again. If runout still exceeds specifications,
replace propeller shaft assembly.
4. Check the vibration by driving the vehicle.
APPEARANCE CHECKING

Inspect propeller shaft tube surface for dents or cracks. If damaged, replace propeller shaft assembly.
Removal and InstallationADS000KM
REMOVAL
1. Remove the front and rear engine undercover with power tool.
2. Remove the front cross bar with power tool. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
3. Remove the exhaust front tube bracket with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
4. Disconnect the heated oxygen sensor harness connector.
5. Remove the exhaust front tube mounting nuts with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
6. Remove the right bank catalytic converter with power tool. Refer to EM-26, "
Removal and Installation"
(VQ35DE) or EM-178, "Removal and Installation" (VK45DE).
7. Remove the power steering piping mounting bolts. Refer to PS-
41, "HYDRAULIC LINE" .
8. Remove the power steering gear box fixing bolts to secure work-
ing area for removal of propeller shaft. Refer to PS-19, "
POWER
STEERING GEAR AND LINKAGE" .
CAUTION:
Be careful not to damage the steering gear box piping dur-
ing removal.Propeller shaft runout limit : 0.6 mm (0.024 in) or less
SDIA1759E
SDIA1515E
1. Propeller shaft assembly 2. O-ring
SDIA1516E

PS-8
POWER STEERING FLUID
Revision: 2004 November 2004 FX35/FX45
POWER STEERING FLUIDPFP:KLF20
Checking Fluid LevelAGS000GT

Stop engine before performing a fluid level check.

Ensure that fluid level is between the MAX range and MIN level.

Because fluid level differs within the HOT range and the COLD
range, check it carefully.
CAUTION:

Do not overfill the Max level.

Do not reuse any used power steering fluid.

Recommended fluid is Genuine NISSAN PSF or equivalent.
Checking Fluid LeakageAGS000GU
Check the hydraulic piping lines for improper attachment and for
leaks, cracks, damage, loose connections, chafing or deterioration.
1. Run engine until fluid temperature reaches 50 to 80° C (122 to
176°F) in reservoir tank. Keep engine speed idle.
2. Turn steering wheel right-to-left several times.
3. Hold steering wheel at each “lock” position for five seconds to
check fluid leakage.
CAUTION:
Do not hold steering wheel in a locked position for more
than 10 seconds. (There is the possibility that oil pump may
be damaged.)
4. If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not over tighten con-
nector as this can damage O-ring, washer and connector.
5. If fluid leakage from oil pump is noticed, check oil pump. Refer to PS-31, "
POWER STEERING OIL
PUMP" .
6. Check steering gear boots for accumulation of fluid indicating a from steering gear.
Air Bleeding Hydraulic SystemAGS000GV
Incomplete air bleeding causes the following. When this happens, bleed air again.

Generation of air bubbles in reservoir tank.

Generation of clicking noise in oil pump.

Excessive buzzing in oil pump.
NOTE:
When vehicle is stationary or while steering wheel is being turned slowly, some noise may be heard from
oil pump or gear. This noise is normal and does not affect any system.
1. Stop engine, and then turn steering wheel fully to right and left several times.
CAUTION:
Do not allow steering fluid reservoir tank to go below the low-level line. Check tank frequently and
add fluid as needed.
2. Run engine at idle speed. Turn steering wheel fully to the right and then fully to the left, and keep for about
three seconds. Then check whether a fluid leakage has occurred.
3. Repeat the 2nd procedure several times at about three seconds intervals.
CAUTION:
Do not hold steering wheel in the locked position more than 10 seconds. (There is the possibility
that oil pump may be damaged.)
4. Check generation of air bubbles and cloud in fluid.HOT : Fluid temperatures from 50 to 80 °C (122 to
176°F)
COLD : Fluid temperatures from 0 to 30°C (32 to 86°F)
SGIA0232J
SGIA0506E

POWER STEERING FLUID
PS-9
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: 2004 November 2004 FX35/FX45
5. If air bubbles and the cloud don't fade, stop engine, hold air bleeding until air bubbles and the cloud fade.
Perform the 2nd and the 3rd procedures again.
6. Stop engine, check fluid level.

PS-10
STEERING WHEEL
Revision: 2004 November 2004 FX35/FX45
STEERING WHEELPFP:48430
On-Vehicle Inspection and ServiceAGS000GW
CHECKING CONDITION OF INSTALLATION

Check installation condition of steering gear assembly, front suspension, axle and steering column.

Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.

Check if the mounting bolts for steering gear assembly are loose
or not. Refer to PS-19, "
POWER STEERING GEAR AND LINK-
AGE" .
CHECKING STEERING WHEEL PLAY
1. Set tires to the straight ahead, start engine, then turn steering wheel to the left and right lightly, and mea-
sure steering wheel movement on the outer circumference when steering wheel is turned up to the point
where tires start moving.
CHECKING NEUTRAL POSITION ON STEERING WHEEL
Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to FSU-
6, "Wheel Alignment Inspection" .
1. Set vehicle to the straight direction, check if steering wheel is in the neutral position.
2. If it is not in the neutral position, remove steering wheel and reinstall it correctly.
3. If the neutral position cannot adjust in the two teeth of steering gear assembly, loosen outer socket lock
nuts of steering outer sockets, then adjust outer socket by the same amount in the opposite direction.
CHECKING STEERING WHEEL TURNING FORCE
1. Park vehicle on a level and dry surface, set parking brake.
2. Remove driver air bag module from steering wheel. Refer to SRS-36, "
DRIVER AIR BAG MODULE" .
3. Start engine at idle, make steering fluid reach to normal operat-
ing temperature [50 to 80°C (122 to 176°F)], then check steering
wheel turning torque with pre-load gauge (SST).
4. If steering wheel turning force is out of the specification, check
relief hydraulic pressure of oil pump. Refer to PS-31, "
POWER
STEERING OIL PUMP" . End play of the axle direction for steering wheel : 0 mm (0 in)
SGIA0546E
Steering wheel play on the outer circumference : 0 − 35 mm (0 − 1.38 in)
Turning torque : 7.45 N·m (0.76 kg-m, 66 in-lb) or less
SGIA0459E

POWER STEERING OIL PUMP
PS-31
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: 2004 November 2004 FX35/FX45
POWER STEERING OIL PUMPPFP:49110
On-Vehicle Inspection and ServiceAGS000H2
CHECKING RELIEF OIL PRESSURE (VQ35DE MODELS)
CAUTION:
Before starting work, confirm belt tension is proper.
1. Connect oil pressure gauge (SST) and oil pressure gauge
adapter (SST) between oil pump discharge connector and high
pressure hose and then bleed air from the hydraulic circuit.
2. Start engine. Allow engine to run until tank temperature reaches
50 to 80°C (122 to 176°F).
CAUTION:

Warm up engine with shut-off valve fully opened. If
engine is started with shut-off valve closed, fluid pres-
sure in power steering pump increases to maximum. This
will raise fluid temperature excessively.

Be careful not to contact hose with belt when engine is
started.
3. With engine at idle, close shut-off valve and read the relief oil
pressure.
CAUTION:
Do not close shut-off valve of pressure gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly.
If relief oil pressure is outside the specification, disassemble and repair oil pump. Refer to PS-33, "
Disas-
sembly and Assembly (VQ35DE models)" .
5. After inspection, disconnect oil pressure gauge (SST) and oil pressure gauge adapter (SST) from hydrau-
lic circuit, connect oil pump discharge connector and high pressure hose. Add fluid and bleed air from
hydraulic circuit thoroughly.
Refer to PS-8, "
Air Bleeding Hydraulic System" .
CHECKING RELIEF OIL PRESSURE (VK45DE MODELS)
CAUTION:
Before starting work, confirm belt tension is proper.
SGIA0570E
SST
Pressure gaugeKV48103500
(J26357&J26357-10)
Oil pump sideEye joint KV48102500-01 ( — )
Washer KV48102500-04 ( — )
Bolt KV48102500-03 ( — )
High pressure
piping sideFlare joint KV48102500-02 ( — )
Washer KV48102500-04 ( — )
Bolt KV48102500-03 ( — )
Relief oil pressure:
9,900 - 10,700 kPa (101 - 109 kg/cm
2 , 1449 - 1564 psi)
SGIA0522E

PS-32
POWER STEERING OIL PUMP
Revision: 2004 November 2004 FX35/FX45
1. Connect oil pressure gauge (SST) and oil pressure gauge
adapter (SST) between oil pump discharge connector and high
pressure hose and then bleed air from the hydraulic circuit.
2. Start engine. Allow engine to run until tank temperature reaches 50 to 80°C (122 to 176°F).
CAUTION:

Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed,
fluid pressure in power steering pump increases to maximum. This will raise fluid temperature
excessively.

Be careful not to contact hose with belt when engine is started.
3. With engine at idle, close shut-off valve and read the relief oil pressure.
CAUTION:
Do not close shut-off valve of pressure gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly.
If relief oil pressure is outside the specification, disassemble and repair oil pump. Refer to PS-37, "
Disas-
sembly and Assembly (VK45DE models)" .
5. After inspection, disconnect oil pressure gauge (SST) and oil pressure gauge adapter (SST) from hydrau-
lic circuit, connect oil pump discharge connector and high pressure hose. Add fluid and bleed air from
hydraulic circuit thoroughly. Refer to PS-8, "
Air Bleeding Hydraulic System" .
Removal and Installation (VQ35DE models)AGS000HI
REMOVAL
1. Remove undercover from vehicle with power tool.
2. Loosen belt tensioner adjust screw, then remove belt from oil pump pulley. Refer to EM-15, "
DRIVE
BELTS" .
3. Drain power steering fluid from reservoir tank.
SGIA0570E
SST
Pressure gauge and shut-off valveKV48103500
(J26357 and
J26357-10)
Oil pump sideConnector A and
O-ringKV48105300-4
and 5295262U10
(—)
Eye-bolt and O-
ringKV48105300-3
and 5295262U00
(—)
High pressure
piping sideConnector B and
O-ringKV48105300-1
and 5295262U00
(—)
Nut KV48105300-2
( — )
SGIA0572E
Relief oil pressure:
9,900 - 10,700 kPa (101 - 109 kg/cm
2 , 1449 - 1564 psi)

POWER STEERING OIL PUMP
PS-33
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: 2004 November 2004 FX35/FX45
4. Remove piping of high pressure and low pressure (drain fluid from their pipings). Refer to PS-41,
"HYDRAULIC LINE" .
5. Remove mounting bolts, then remove power steering pump.
INSTALLATION
Refer to PS-41, "HYDRAULIC LINE" for tightening torque. Install in the reverse order removal.

After installation, adjust belt tension. Refer to EM-15, "DRIVE BELTS" .

After installation, bleed air. Refer to PS-8, "Air Bleeding Hydraulic System" .
Removal and Installation (VK45DE models)AGS000HJ
REMOVAL
1. Remove undercover from vehicle with power tool.
2. Remove power steering oil pump belt from auto tensioner. Refer to EM-169, "
DRIVE BELTS" .
3. Drain power steering fluid from reservoir tank.
4. Remove piping of high pressure and low pressure from power steering oil pump (drain fluid from their pip-
ings). Refer to PS-41, "
HYDRAULIC LINE" .
5. Remove mounting bolts, then remove power steering pump.
INSTALLATION
Refer to PS-41, "HYDRAULIC LINE" for tightening torque. Install in the reverse order removal.
After installation, bleed air. Refer to PS-8, "
Air Bleeding Hydraulic System" .
NOTE:
Adjustment of belt tension is no necessary because engine of this model equips auto tensioner.
Disassembly and Assembly (VQ35DE models)AGS000HE
INSPECTION BEFORE DISASSEMBLY
Disassemble power steering oil pump only if the following items are found.

Oil leakage from oil pump

Deformed or damaged pulley
1. Rear cover 2. Teflon ring 3. O-ring
4. Rear side plate 5. Rotor snap ring 6. Dowel pin
7. Cam ring 8. Rotor 9. Vane
10. Cartridge 11. Front side plate 12. O-ring
13. Flow control valve A 14. Spring 15. Flow control valve B assembly
16. Body assembly 17. Oil seal 18. Pulley
19. O-ring 20. Suction pipe 21. Bracket
SGIA0622E

CHARGING SYSTEM
SC-35
C
D
E
F
G
H
I
J
L
MA
B
SC
Revision: 2004 November 2004 FX35/FX45
Installation
Note the following, and install in the reverse order of removal.

Install alternator, and check tension of belt. Refer to EM-169, "Checking Drive Belts" in “ENGINE
MECHANICAL (EM)” section.
CAUTION:
Be sure to tighten B terminal nut carefully.
VQ35DE ENGINE MODELS
Removal
1. Disconnect negative battery cable.
2. Remove engine front undercover, using power tools.
3. Remove alternator and power steering belt. Refer to EM-16, "
Removal and Installation" in “ENGINE
MECHANICAL (EM)” section.
4. Disconnect alternator connector.
5. Remove B terminal nut.
6. Remove harness clip and water hose bracket from alternator.
1. B terminal nut 2. Alternator B terminal harness 3. Alternator connector
4. Alternator mounting bolt 5. Alternator stay mounting bolt 6. Alternator stay
7. Alternator
PKIA2821E
PKIA2358E