lan s INFINITI FX35 2004 Owners Manual

RADIATOR
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Revision: 2004 November 2004 FX35/FX45
8. Rotate two radiator upper mount brackets 90 degrees in the
direction shown in the figure, and remove them.
9. Lift up and remove radiator.
CAUTION:
Do not damage or scratch air conditioner condenser and
radiator core when removing.
INSTALLATION
Install in the reverse order of removal.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J-33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-11, "
CHECKING COOLING SYSTEM FOR
LEAKS" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant and A/T fluid.
Checking Radiator CapABS008FW
1. Pull radiator cap negative-pressure valve to open it, and make
sure it close completely when released.

Make sure there is no dirt or damage on valve seat of radiator
cap negative-pressure valve.

Make sure there are no unusualness in the opening and clos-
ing conditions of radiator cap negative-pressure valve.
2. Check radiator cap relief pressure.

When connecting radiator cap to radiator cap tester adapter
(SST) and radiator cap tester (commercial service tool), apply
engine coolant to the cap seal part.

Replace radiator cap if there is an unusualness in radiator cap
negative-pressure valve, or if the open-valve pressure is out-
side of the standard values.
SBIA0447E
SBIA0448E
SMA967B
Standard
: 78 - 98 kPa (0.8 - 1.0 kg/cm
2 , 11 - 14 psi)
Limit
: 59 kPa (0.6 kg/cm
2 , 9 psi)
SLC755A

CO-22
[VQ35DE]
WATER PUMP
Revision: 2004 November 2004 FX35/FX45
WATE R P U M PPFP:21020
Removal and InstallationABS009RE
CAUTION:

When removing water pump, be careful not to get engine coolant on drive belt.

Water pump cannot be disassembled and should be replaced as a unit.
REMOVAL
1. Remove front engine undercover with power tool.
2. Remove drive belts. Refer to EM-15, "
DRIVE BELTS" .
3. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform when engine is cold.
4. Remove air duct (inlet), power duct and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND
AIR DUCT" .
5. Remove water drain plug (front) of cylinder block.
6. Remove chain tensioner cover and water pump cover separat-
i n g t h e m a t i n g s u r f a c e w i t h a s e a l c u t t e r [ S S T: K V 1 0 1111 0 0 ( J -
37228)].
CAUTION:
Be careful not to damage the mating surfaces.
1. Chain tensioner 2. Chain tensioner cover 3. Water pump cover
4. Water pump 5. O-rings 6. Water drain plug (front)
SBIA0482E
PBIC0846E

CO-24
[VQ35DE]
WATER PUMP
Revision: 2004 November 2004 FX35/FX45
9. Screw M8 bolts [pitch: 1.25 mm (0.049 in) length: approx. 50
mm (1.97 in)] into water pumps upper and lower mounting bolt
holes until they reach timing chain case. Then, alternately
tighten each bolt for a half turn, and pull out water pump.
CAUTION:

Pull straight out while preventing vane from contacting
socket in installation area.

Remove water pump without causing sprocket to contact
timing chain.
10. Remove M8 bolts and O-rings from water pump.
CAUTION:
Do not disassembly water pump.
INSPECTION AFTER REMOVAL

Check for badly rusted or corroded water pump body assembly.

Check for rough operation due to excessive end play.

If anything is found, replace water pump.
INSTALLATION
1. Install new O-rings to water pump.

Apply engine oil and engine coolant to O-rings as shown in
the figure.

Locate O-ring with white paint mark to engine front side.
2. Install water pump.
CAUTION:
Do not allow cylinder block to nip O-rings when install
water pump.

Make sure timing chain and water pump sprocket are
engaged.

Insert water pump by tightening mounting bolts alternately
and evenly.
3. Install timing chain tensioner (primary) as the following:
a. Remove dust and foreign material completely from backside of chain tensioner and from installation area
of rear timing chain case.
b. Turn crankshaft pulley clockwise so that timing chain on the timing chain tensioner (primary) side is loose.

Apply engine oil should be applied to the oil hole and tensioner, when installing timing chain
tensioner.
JLC357B
SLC943A
PBIC1397E
PBIC1058E

WATER PUMP
CO-25
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Revision: 2004 November 2004 FX35/FX45
c. Install timing chain tensioner (primary).
d. Remove stopper pin.
4. Install chain tensioner cover and water pump cover.
a. Before installing, remove all traces of liquid gasket from mating
surface of water pump cover and chain tensioner cover using a
scraper. Also remove traces of liquid gasket from the mating sur-
face of front timing chain case.
b. Apply a continuous bead of liquid gasket to mating surface of
chain tensioner cover and water pump cover with tube presser
[SST: WS39930000 ( – )].
Use Genuine RTV Silicone Sealant or equivalent. GI-48,
"RECOMMENDED CHEMICAL PRODUCTS AND SEAL-
ANTS".
5. Install water drain plug (front) of cylinder block.

Apply liquid gasket to the thread of water drain plug (front).
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-48, "
RECOMMENDED CHEMICAL
PRODUCTS AND SEALANTS".
6. Install in the reverse order of removal for remaining parts.

After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to
purge air from the high-pressure chamber of chain tensioner. Engine may produce a rattling
noise. This indicates that air still remains in the chamber and is not a matter of concern.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J-33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-11, "
CHECKING COOLING SYSTEM FOR
LEAKS" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant and A/T fluid.
SLC448B
SLC446B
PBIC1283E

CO-26
[VQ35DE]
WATER INLET AND THERMOSTAT ASSEMBLY
Revision: 2004 November 2004 FX35/FX45
WATER INLET AND THERMOSTAT ASSEMBLYPFP:21200
Removal and InstallationABS009RF
REMOVAL
1. Remove front engine undercover using power tool.
2. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air duct and air cleaner case. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
4. Remove water drain plug (front) of cylinder block.
5. Disconnect radiator hose (upper) and oil cooler hose from water inlet and thermostat assembly.
6. Remove water inlet and thermostat assembly.

Do not disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.
1. Water inlet and thermostat assembly 2. Gasket
SBIA0483E
PBIC0846E
SLC962AB

WATER INLET AND THERMOSTAT ASSEMBLY
CO-27
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Revision: 2004 November 2004 FX35/FX45
INSPECTION AFTER REMOVAL
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2. Check valve operation.
INSTALLATION
Note to the following, and install in the reverse order of removal.

Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.

Install water drain plug (front) of cylinder block.
–Apply liquid gasket to the thread of water drain plug (front).
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-48, "
RECOMMENDED CHEMICAL
PRODUCTS AND SEALANTS".
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J-33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-11, "
CHECKING COOLING SYSTEM FOR
LEAKS" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant.
Thermostat Standard
Valve opening temperature 76 - 79°C (169 - 174°F)
Maximum valve lift More than 8.6 mm / 90°C (0.339 in / 194°F)
Valve closing temperature More than 71 °C (160 °F)
SLC949A

CO-28
[VQ35DE]
WATER OUTLET AND WATER PIPING
Revision: 2004 November 2004 FX35/FX45
WATER OUTLET AND WATER PIPINGPFP:11060
Removal and InstallationABS007ZU
REMOVAL
1. Remove front engine undercover with power tool.
2. Drain engine coolant from drain plug and water drain plugs on radiator and both sides of cylinder block.
Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform when engine is cold.
3. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
4. Remove air duct and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
5. Disconnect radiator upper hose, heater hose and water hose.
6. Remove water outlet and water piping.
INSTALLATION
Note to the following, and install in the reverse order of removal.

Securely insert each hose, and install a clamp at a position where it does not interfere with the pipe bulge.

When inserting a water pipe into water outlet, apply neutral detergent to O-ring.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J-33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-11, "
CHECKING COOLING SYSTEM FOR
LEAKS" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant and A/T fluid.
1. Harness bracket 2. Water hose 3. Water bypass hose
4. Engine coolant temperature sensor 5. Gasket 6. Water outlet
7. Heater hose 8. Water pipe 9. Radiator upper hose
10. Heater pipe 11. Washer 12. O-ring
SBIA0484E

SERVICE DATA AND SPECIFICATIONS (SDS)
CO-29
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Revision: 2004 November 2004 FX35/FX45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00100
Standard and LimitABS004W0
ENGINE COOLANT CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
THERMOSTAT
RADIATOR
Unit: kPa (kg/cm2 , psi)
Engine coolant capacity [With reservoir tank (“MAX” level)] 8.6 (9-1/8, 7- 5/8)
Reservoir tank engine coolant capacity (at “MAX” level) 0.8 (7/8, 3/4)
ThermostatStandard
Valve opening temperature 76.0 - 79.0°C (169 - 174°F)
Maximum valve lift More than 8.6 mm / 90°C (0.339 in / 194°F)
Valve closing temperature More than 71°C (160°F)
Cap relief pressureStandard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage test pressure 157 (1.6, 23)

CO-32
[VK45DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2004 November 2004 FX35/FX45
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartABS006JF
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
Fan assembly — High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio—— —
Poor engine coolant quality — Engine coolant density —
Insufficient engine coolantEngine coolant leaksCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration

CO-36
[VK45DE]
ENGINE COOLANT
Revision: 2004 November 2004 FX35/FX45
ENGINE COOLANTPFP:KQ100
InspectionABS006JI
LEVEL CHECK

Check if reservoir tank engine coolant level is within “MIN” to
“MAX” when engine is cool.

Adjust the engine coolant level as necessary.
LEAK CHECK

To check for leaks, apply pressure to the cooling system with
radiator cap tester (commercial service tool) and radiator cap
tester adapter (SST).
WARNING:
Do not remove radiator cap when engine is hot. Serious
burns could occur from high-pressure engine coolant
escaping from thermostat housing.
CAUTION:
Higher testing pressure than specified may cause radiator
damage.
NOTE:
In a case engine coolant decreases, replenish radiator with engine coolant.

If anything is found, repair or replace damaged parts.
Changing Engine CoolantABS006JJ
WARNING:

To avoid being scalded, do not change engine coolant when engine is hot.

Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a
quarter of a turn to release built-up pressure. Then turn radiator cap all the way.
DRAINING ENGINE COOLANT
1. Remove engine front undercover with power tool.
2. Open radiator drain plug at the bottom of radiator, and then
remove radiator cap.

Be careful not to allow engine coolant to contact drive
belts.
When draining all of engine coolant in the system, open water drain plugs on engine cylinder
block. Refer to EM-241, "
DISASSEMBLY" .
3. Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to CO-38, "
FLUSHING COOLING SYSTEM" .
4. Remove reservoir tank, drain engine coolant and clean reservoir tank before installing.
SMA412B
Testing pressure : 157 kPa (1.6 kg/cm2 , 23 psi)
PBIC1528E
SBIA0444E