2005 INFINITI FX35 engine

CO-24
[VQ35DE]
WATER PUMP
Revision: 2005 July 2005 FX
b. Screw M8 bolts [pitch: 1.25 mm (0.0492 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.
c. Remove M8 bolts and O-rings from water pump. CAUTION:
Do not disassemble 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 installing
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 follows:
a. Remove dust and foreign material completely from backside of timing chain tensioner (primary) 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.
c. Install timing chain tensioner (primary) with its stopper pin attached.
JLC357B
SLC943A
PBIC1397E
PBIC1058E

WATER PUMP CO-25
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CAUTION:
Be careful not to drop mounting bolts inside timing chain case.
d. Remove stopper pin.
e. Make sure again that timing chain and water pump sprocket are engaged.
4. Install chain tensioner cover and water pump cover as follows:
a. Before installing, remove all traces of old liquid gasket from mat- ing surface of water pump cover and chain tensioner cover
using a scraper. Also remove traces of old liquid gasket from the
mating surface of front timing chain case.
b. Apply a continuous bead of liquid gasket with the tube presser [SST: WS39930000 ( — )] to mating surface of chain ten-
sioner cover and water pump cover.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .
CAUTION:
Attaching should be done within 5 minutes after coating.
c. Tighten mounting bolts.
5. Install water drain plug (front) on water pump side 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 the radiator cap tester adapter [SST: EG17650301 (J33984-A)]
and the radiator cap tester (commercial service tool). Refer to CO-11, "
LEAK CHECK" .

Start and warm up the engine. Visually make sure that there is no leaks of engine coolant.
SLC448B
SLC446B
PBIC2663E

CO-26
[VQ35DE]
WATER INLET AND THERMOSTAT ASSEMBLY
Revision: 2005 July 2005 FX
WATER INLET AND THERMOSTAT ASSEMBLYPFP:21200
ComponentsABS00E81
Removal and InstallationABS009RF
REMOVAL
1. Remove front engine undercover using power tool.
2. Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug at the front of cylinder block. Refer to CO-11, "
Changing Engine Coolant" and CO-22, "WATER PUMP" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air duct (inlet). Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
4. Disconnect radiator hose (lower) and oil cooler water hose from water inlet and thermostat assembly.
5. Remove water inlet and thermostat assembly. CAUTION:
Do not disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.
1. Gasket 2. Water inlet and thermostat assembly
SBIA0483E
SLC962AB

WATER INLET AND THERMOSTAT ASSEMBLY CO-27
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INSPECTION AFTER REMOVAL
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2. Check valve operation.

If the malfunctioning condition, when valve seating at ordinary
room temperature, or measured values are out of the standard,
replace water inlet and thermostat assembly.
INSTALLATION
Note 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.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301 (J33984-A)]
and the radiator cap tester (commercial service tool). Refer to CO-11, "
LEAK CHECK" .

Start and warm up the 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 8.6 mm / 90 °C (0.339 in / 194 °F)
Valve closing temperature 71 °C (160 °F)
SLC949A

CO-28
[VQ35DE]
WATER OUTLET AND WATER PIPING
Revision: 2005 July 2005 FX
WATER OUTLET AND WATER PIPINGPFP:11060
ComponentsABS00E82
Removal and InstallationABS007ZU
REMOVAL
1. Remove front engine undercover with power tool.
2. Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug at the front of cylinder block. Refer to CO-11, "
Changing Engine Coolant" and CO-22, "WATER PUMP" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
3. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
4. Remove air duct (inlet), air duct and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR
DUCT" .
5. Remove radiator hose (upper) and heater hose.
6. Remove the following parts, when remove water outlet.

A/T fluid charging pipe; Refer to AT- 2 7 0 , "TRANSMISSION ASSEMBLY" .

Intake manifold collectors (upper and lower). Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" .

Rocker cover (right bank). Refer to EM-51, "ROCKER COVER" .
7. Remove engine coolant temperature sensor as necessary. CAUTION:
Be careful not to damage engine coolant temperature sensor.
8. Remove water outlet, heater pipe, water bypass hoses and water pipe.
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 hose (upper)
10. Heater pipe 11. Washer 12. O-ring
SBIA0484E

WATER OUTLET AND WATER PIPING CO-29
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INSTALLATION
Note the following, and install in the reverse order of removal.

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

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

Check for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301 (J33984-A)]
and the radiator cap tester (commercial service tool). Refer to CO-11, "
LEAK CHECK" .

Start and warm up the engine. Visually make sure that there is no leaks of engine coolant.

CO-30
[VQ35DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2005 July 2005 FX
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00100
Standard and LimitABS004W0
ENGINE COOLANT CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
RADIATOR
Unit: kPa (kg/cm2 , psi)
THERMOSTAT
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)
Cap relief pressure Standard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage testing pressure 157 (1.6, 23)
Thermostat Standard
Valve opening temperature 76 - 79 °C (169 - 174 °F)
Maximum valve lift 8.6 mm / 90 °C (0.339 in / 194 °F)
Valve closing temperature 71 °C (160 °F)

OVERHEATING CAUSE ANALYSIS CO-33
[VK45DE]
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Revision: 2005 July 2005 FX
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartABS006JF
Symptom Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed —
Damaged fins Dust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling 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 coolant Engine coolant leaks Cooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into
cooling system Cylinder head deterioration
Cylinder head gasket dete-
rioration