2001 INFINITI QX4 alternator belt

9. Remove the crankshaft position sensors (REF and POS).
10. Remove drive belts and idler pulley with bracket.
11. Remove power steering oil pump, then put it aside holding with
a suitable wire.
12. Remove alternator.
SEM605G
13. Install engine slingers.
14. Remove front propeller shaft. (4WD)
Refer to PD-6, ªRemoval and Installationº.
15. Remove exhaust front tube heat insulators, then remove rear
heat oxygen sensors.
16. Remove exhaust front tube from both sides.
Refer to FE-8, ªRemoval and Installationº.
17. Remove front final drive. (4WD)
Refer to PD-18, ªRemoval and Installationº.
18. Remove starter motor.
19. Disconnect oil pressure switch harness connector.
SEM528G
20. Loosen and disconnect the bolts fixing the steering column
assembly lower joint and the power steering gear.
SEM471G
21. Set a suitable transmission jack under the front suspension
member and hoist engine with engine slingers.
EMQ0357D
22. Remove front engine mounting nuts from both sides.
OIL PAN
Removal (Cont'd)
EM-16

CAUTION:
IAfter removing timing chain, do not turn crankshaft and
camshaft separately, or valves will strike piston heads.
IWhen installing camshafts, chain tensioners, oil seals, or
other sliding parts, lubricate contacting surfaces with new
engine oil.
IApply new engine oil to bolt threads and seat surfaces
when installing camshaft sprockets and crankshaft pulley.
IBefore disconnecting fuel hose, release fuel pressure.
Refer to EC-39, ªFuel Pressure Releaseº.
IBe careful not to damage sensor edges.
IDo not spill engine coolant on drive belts.
RemovalNBEM00121. Release fuel pressure.
Refer to EC-39, ªFuel Pressure Releaseº.
2. Remove battery.
3. Remove radiator.
Refer to LC-19, ªREMOVAL AND INSTALLATIONº.
4. Drain engine oil.
5. Remove drive belts and idler pulley with brackets.
6. Remove cooling fan with bracket.
7. Remove engine cover.
8. Remove air duct with air cleaner case, collector, blow-by hose,
vacuum hoses, fuel hoses, water hoses, wires, harnesses,
connectors and so on.
9. Remove the air compressor, and tie it down using rope or the
like to keep it from interfering.
10. Remove the power steering oil pump and reservoir tank. Tie
them down using rope or the like to keep them from interfer-
ing.
11. Remove alternator.
12. Remove the following.
IVacuum gallery
IWater bypass pipe
IBrackets
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TIMING CHAIN
Components (Cont'd)
EM-23

Rear Engine MountingNBEM0042S0102
SEM459G
SEM605G
SEM461G
SEM324F
1. Release fuel pressure.
Refer to EC-39, ªFuel pressure releaseº.
2. Remove engine hood and front RH and LH wheels.
3. Remove engine undercover and suspension member stay.
4. Drain coolant from radiator.
5. Remove the following parts.
IRadiator shroud
IRadiator
ICooling fan
IDrive belts
IBattery
IEngine cover
IThrottle wires
6. Air duct with air cleaner case.
7. Disconnect vacuum hoses, fuel hoses, heater hoses, EVAP
canister hoses, harnesses, connectors and so on.
8. Remove air conditioner compressor from bracket, then put it
aside holding with a suitable wire.
9. Remove power steering oil pump and reservoir tank with
bracket, then put it aside holding with a suitable wire.
10. Remove alternator.
11. Remove exhaust front tube heat insulators, then remove rear
heated oxygen sensors.
12. Remove exhaust front and rear tubes.
Refer to FE-8, ªRemoval and Installationº.
13. Remove transmission with transfer.
Refer to AT-277, ªRemovalº.
14. Remove TWC (manifold) heat insulators, then remove TWC
(manifold).
15. Install engine slingers.
16. Hoist engine with engine slingers and remove front engine
mounting nuts.
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ENGINE ASSEMBLY
Removal and Installation (Cont'd)
EM-59

QUICK REFERENCE CHART: QX42001
Engine model VQ35DE
Firing order 1-2-3-4-5-6
Idle speed rpmA/T
(in ªNº position)750 50
Ignition timing (degree BTDC at idle speed) 15É 2É
CO% at idleIdle mixture screw is preset and
sealed at factory.
Drive belt deflection (Cold) mm (in) Used belt
Deflection of
new belt
LimitDeflection
after
adjustment
Alternator
Power steering oil pump
Fan7 (0.28)4-5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)
Air conditioner compressor 12 (0.472)9-10
(0.354 - 0.394)8-9
(0.31 - 0.35)
Applied pressed force
N (kg, lb)98 (10, 22)
Drive belt tension adjustment (Cold)
N (kg, lb)Used belt
New belt
LimitAfter
adjustment
Alternator
Power steering pump
Fan294 (30, 66)730 - 818
(74.4 - 83.5,
164 - 184)838 - 926
(85.4 - 94.5,
188 - 208)
Air conditioner compressor 196 (20, 44)348 - 436
(35.5 - 44.5,
78 - 98)470 - 559
(47.9 - 57.0,
106 - 126)
Radiator cap relief pressure
kPa (kg/cm
2, psi)78 - 98 (0.8 - 1.0, 11 - 14)
Cooling system leakage testing pressure
kPa (kg/cm
2, psi)157 (1.6, 23)
Compression pressure
kPa (kg/cm
2, psi)/rpmStandard 1,275 (13.0, 185)/300
Minimum 981 (10.0, 142)/300
Spark plugStandard PLFR5A-11
Cold PLFR6A-11
Hot PLFR4A-11
Applied model 245/70 R16 tire
Camber
Degree minute
(Decimal degree)Minimum þ0É35¢(þ0.58É)
Nominal 0É10¢(0.17É)
Maximum 0É55¢(0.92É)
Left and right
difference45¢(0.75É) or less
Caster
Degree minute
(Decimal degree)Minimum 2É15¢(2.25É)
Nominal 3É00¢(3.00É)
Maximum 3É45¢(3.75É)
Left and right
difference45¢(0.75É) or less
Total toe-in Minimum 1 (0.04)
Distance (A þ B)
mm (in)Nominal 2 (0.08)
Maximum 3 (0.12)
Angle (left plus right)
Degree minute
(Decimal degree)Minimum 5¢(0.08É)
Nominal 10¢(0.17É)
Maximum 15¢(0.25É)
Wheel turning angle
(Full turn)Minimum 30É00¢(30.00É)
Inside
Degree minute
(Decimal degree)Nominal 33É00¢(33.00É)
Maximum 34É00¢(34.00É)
Outside
Degree minute
(Decimal degree)Minimum 28É00¢(28.00É)
Nominal 31É00¢(31.00É)
Maximum 32É00¢(32.00É)
* Fuel, radiator coolant and engine oil full.
Spare tire, jack, hand tools and mats in designated positions.
Unit: mm (in)Front brake
Pad wear limit 2.0 (0.079)
Rotor repair limit 26.0 (1.024)
Rear brake
Lining wear limit 1.5 (0.059)
Drum repair limit 296.5 (11.67)
Pedal free height 175 - 185 (6.89 - 7.28)
Pedal depressed height*1 70 (2.76)
Parking brake
Number of notches*2 6 - 8
*1 Under force of 490 N (50 kg, 110 lb) with engine running
*2 At pulling force: 196 N (20 kg, 44 lb)
Unit Liter US measure
Coolant with reservoir 9.2 9-3/4 qt
Engine*With oil filter 5.0 5-1/4 qt
Without oil filter 4.8 5-1/8 qt
Dry engine (engine overhaul) 6.8 7-1/4 qt
Transmis-
sionA/T2WD
8.5 9 qt
4WD
All-mode 4WD transfer 3.0 2-5/8 qt
Differential carrierFront 1.85 3-7/8 pt
Rear 2.8 5-7/8 pt
Power steering system 0.9 1 qt
Air conditioning systemRefrigerant 0.60 - 0.70 kg 1.32 - 1.54 lb
Compressor
oil0.20 6.8 fl oz
* For further details, see ªChanging Engine Oilº in MA section.
Preload
(At hub bolt)
N (kg, lb)Wheel bearing lock nut
78-98(8-10,58-72)
Tightening torque
N×m (kg-m, ft-lb)
Retightening torque after loosen-
ing wheel bearing lock nut
N×m (kg-m, in-lb)0.5 - 1.5 (0.05 - 0.15, 4.3 - 13.0)
Axial end play
mm (in)0 (0)
Starting force at wheel hub bolt
N (kg, lb)A
Turning angle
degree15É - 30É
Starting force at wheel hub bolt
N (kg, lb)B
Wheel bearing preload at wheel hub
bolt
B þ A N (kg, lb)7.06 - 20.99 (0.72 - 2.14, 1.59 - 4.72)

Checking Drive BeltsNBMA0010
SMA091D
1. Inspect belt for cracks, fraying, wear and oil. If necessary,
replace.
2. Inspect drive belt deflection or tension at a point on the belt
midway between pulleys.
3. Check belt tension using belt tension gauge (BT3373-F or
equivalent).
Inspect drive belt deflection or tension when engine is cold.
Adjust if belt deflections exceed the limit or if belt tension is
not within specifications.
Belt deflection and tension
Deflection adjustment Unit: mm (in) Tension adjustment *1 Unit: N (kg, lb)
Used belt
New beltUsed belt
New belt
Limit After adjustment Limit After adjustment
Alternator
Power steering
oil pump
Fan7 (0.28)4-5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)294 (30, 66)730 - 818 (74.4 -
83.5, 164 - 184)838 - 926 (85.4 -
94.5, 188 - 208)
Air conditioner
compressor12 (0.47)9-10
(0.35 - 0.39)8-9
(0.31 - 0.35)196 (20, 44)348 - 436 (35.5 -
44.5, 78 - 98)470 - 559 (47.9 -
57.0, 106 - 126)
Applied pushing
force98 N (10 kg, 22 lb) Ð
*1 If belt tension gauge cannot be installed at check points shown, check drive belt tension at a different location on the belt.
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ENGINE MAINTENANCE
Checking Drive Belts
MA-13

Engine Maintenance
DRIVE BELT DEFLECTIONNBMA0038Unit: mm (in)
Used belt deflection
Deflection of new belt
Limit Deflection after adjustment
Alternator
Power steering oil pump
Fan7 (0.28)4 - 5 (0.16 - 0.20) 3.5 - 4.5 (0.138 - 0.177)
Air conditioner compressor 12 (0.47) 9 - 10 (0.35 - 0.39)8 - 9 (0.31 - 0.35)
Applied pushing force 98 N (10 kg, 22 lb)
DRIVE BELT TENSIONNBMA0042Unit: N (kg, lb)
Used belt
New belt
Limit After adjustment
Generator
Power steering oil pump
Fan294 (30, 66) 730 - 818 (74.4 - 83.5, 164 - 184) 838 - 926 (85.4 - 94.5, 188 - 208)
Air conditioner compressor 196 (20, 44) 348 - 436 (35.5 - 44.5, 78 - 98) 470 - 559 (47.9 - 57.0, 106 - 126)
SPARK PLUG TYPENBMA0039
Symbol Make
Standard type PLFR5A-11 NGK
Cold type PLFR6A-11 NGK
Hot type PLFR4A-11 NGK
Plug gap (Nominal) 1.1 mm (0.043 in)
Chassis and Body Maintenance
WHEEL BALANCENBMA0040
Maximum allowable unbalanceDynamic (At rim flange) g (oz) 10 (0.35) (one side)
Static g (oz) 20 (0.71)
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SERVICE DATA AND SPECIFICATIONS (SDS)
Engine Maintenance
MA-29

STARTING & CHARGING SYSTEM
SECTION
SC
CONTENTS
PRECAUTIONS...............................................................2
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............2
Wiring Diagrams and Trouble Diagnosis .....................2
PREPARATION...............................................................3
Special Service Tool ....................................................3
BATTERY.........................................................................4
How to Handle Battery ................................................4
METHODS OF PREVENTING OVER-DISCHARGE......4
CHECKING ELECTROLYTE LEVEL............................4
SPECIFIC GRAVITY CHECK......................................5
CHARGING THE BATTERY........................................6
Trouble Diagnoses with Battery/Starting/Charging
System Tester ..............................................................7
DIAGNOSTIC RESULT ITEM CHART..........................9
STARTING SYSTEM.....................................................10
System Description ....................................................10
Wiring Diagram - START -......................................... 11
Trouble Diagnoses with Battery/Starting/Charging
System Tester ............................................................12
DIAGNOSTIC RESULT ITEM CHART........................13
WORK FLOW..........................................................14
DIAGNOSTIC PROCEDURE 1..................................15
DIAGNOSTIC PROCEDURE 2..................................17
MINIMUM SPECIFICATION OF CRANKING
VOLTAGE REFERENCING COOLANT
TEMPERATURE
......................................................17
Construction ...............................................................18
Removal and Installation ...........................................18
Pinion/Clutch Check ..................................................18
CHARGING SYSTEM....................................................19
System Description ....................................................19
Wiring Diagram - CHARGE -.....................................20
Trouble Diagnoses with Battery/Starting/Charging
System Tester ............................................................21
DIAGNOSTIC RESULT ITEM CHART........................23
WORK FLOW..........................................................24
DIAGNOSTIC PROCEDURE 1..................................25
DIAGNOSTIC PROCEDURE 2..................................26
DIAGNOSTIC PROCEDURE 3..................................27
MALFUNCTION INDICATOR....................................27
Construction ...............................................................28
Removal and Installation ...........................................28
SERVICE DATA AND SPECIFICATIONS (SDS).........29
Battery........................................................................29
Starter ........................................................................29
Alternator ...................................................................29
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