2006 INFINITI M35 engine coolant

CO-14
[VQ35DE]
RADIATOR
Revision: 2006 January2006 M35/M45
RADIATORPFP:21400
ComponentsNBS004QS
Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS004QT
WAR NING :
Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to
release built-up pressure. Carefully remove radiator cap by turning it all the way.
REMOVAL
1. Remove the following parts:
Front engine undercover (power tool).
Engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
Air duct (inlet) and air cleaner case assembly. Refer to EM-17, "AIR CLEANER AND AIR DUCT" .
1. Reservoir tank cap 2. Reservoir tank 3. Reservoir tank bracket
4. Reservoir tank hose 5. Radiator hose (upper) 6. Air guide
7. Mount bracket (RH) 8. Mounting rubber (upper) 9. A/C condenser
10. Radiator cap 11. Mount bracket (LH) 12. Radiator
13. Mounting rubber (lower) 14. A/T fluid cooler hose 15. A/T fluid cooler hose
16. O-ring 17. Drain plug 18. Radiator hose (lower)
19. Cooling fan assembly
A. To water outlet B. To water inlet C. To transmission
D. To transmission
PBIC4717E

RADIATOR
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Revision: 2006 January2006 M35/M45
2. Remove front grille and front grille support. Refer to EI-16, "FRONT GRILLE" .
NOTE:
If stopping at the removal and installation of the cooling fan assembly, this procedure is not necessary.
3. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine coolant on drive belts.
4. Remove the A/C piping bracket from left side member, and then move the A/C piping out of the way.
5. Disconnect A/T fluid cooler hoses from radiator.
Install blind plug to avoid leakage of A/T fluid.
6. Remove radiator hoses (upper and lower) and reservoir tank hose.
CAUTION:
Be careful not to allow engine coolant to contact drive belts.
7. Remove cooling fan assembly (1). Refer to CO-22, "
COOLING
FAN" .
CAUTION:
Do not damage or scratch radiator core when removing.
8. Remove radiator as follows:
a. Remove mount bracket (RH and LH).
b. Pull the radiator (1) rearward from the vehicle, and then remove
the mounting bolts (3) and A/C condenser (2).
NOTE:
Figure shows right side.
c. Lift up and pull the radiator (4) rearward, and then remove the mounting rubber (lower) (3) from the radia-
tor core support (2).
CAUTION:
At this time, A/C condenser is on the lower end of radiator
front surface. Minimize the movement to the rear side.
d. Lift up the A/C condenser to disengage the lower end of front surface, and then remove the radiator.
CAUTION:
Be careful not to damage radiator and A/C condenser core.
KBIA3587J
KBIA3586J
1 : A/C condenser
: Engine front
PBIC3389E

CO-16
[VQ35DE]
RADIATOR
Revision: 2006 January2006 M35/M45
Minimize the lift of A/C condenser to prevent load from being applied to A/C piping.
e. After removing the radiator, place the A/C condenser on the radiator core support to prevent load from
being applied to piping. And then, temporarily secure them using a rope to prevent them from being
dropped.
INSTALLATION
Installation is the reverse order of removal.
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 and A/T fluid.
Checking Radiator CapNBS004QU
Check valve seat of radiator cap.
–Check if valve seat is swollen to the extent that the edge of the
plunger cannot be seen when watching it vertically from the top.
–Check if valve seat has no soil and damage.
Pull negative-pressure valve to open it, and make sure that it
close completely when released.
–Make sure that there is no dirt or damage on the valve seat of
radiator cap negative-pressure valve.
–Make sure that there are no unusualness in the opening and
closing conditions of negative-pressure valve.
Check radiator cap relief pressure.
–When connecting radiator cap to the radiator cap tester (com-
mercial service tool) and the radiator cap tester adapter (SST),
apply engine coolant to the cap seal surface.
Replace radiator cap if there is an unusualness related to the above three.
CAUTION:
When installing radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue
or foreign material.
Checking RadiatorNBS004QV
Check radiator for mud or clogging. If necessary, clean radiator as follows.
Be careful not to bend or damage radiator fins.
PBIC2816E
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]
COOLING FAN
Revision: 2006 January2006 M35/M45
COOLING FANPFP:21140
ComponentsNBS004QY
Removal and Installation NBS004QZ
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT"
.
3. Drain engine coolant from radiator. Refer to CO-11, "
ENGINE COOLANT" .
4. Disconnect harness connector from cooling fan control module, and move harness to aside.
5. Remove radiator hose (upper). Refer to CO-14, "
RADIATOR" .
6. Remove cooling fan assembly.
CAUTION:
Be careful not to damage or scratch on radiator core.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Only use genuine parts for radiator shroud and cooling fan mounting bolt and observe the specified
torque (to prevent radiator from being damaged).
INSPECTION AFTER INSTALLATION
Make sure that fan motors operate normally.
1. Sub-harness 2. Cooling fan control module 3. Sub-harness
4. Fan motor (LH) 5. Fan motor (RH) 6. Fan shroud
7. Cooling fan (RH) 8. Cooling fan (LH)
A. Apply on fan motor shaft.
Apply Genuine High Strength Lock-
ing Sealant or equivalent.
KBIA3567J

CO-24
[VQ35DE]
WATER PUMP
Revision: 2006 January2006 M35/M45
WATE R PU M PPFP:21020
ComponentsNBS004R1
Removal and InstallationNBS004R2
CAUTION:
When removing water pump assembly, be careful not to get engine coolant on drive belts.
Water pump cannot be disassembled and should be replaced as a unit.
After installing water pump, connect hose and clamp securely, then check for leaks using the radi-
ator cap tester (commercial service tool) and the radiator cap tester adapter [SST: EG17650301
(J33984-A)].
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT"
.
3. Remove front engine undercover with power tool.
4. Remove drive belts. Refer to EM-15, "
DRIVE BELTS" .
5. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine coolant on drive belts.
6. Remove water drain plug (front) on water pump side of cylinder
block to drain engine coolant from engine inside.
7. Remove chain tensioner cover and water pump cover from front timing chain case.
1. Timing chain tensioner (primary) 2. Chain tensioner cover 3. Water pump cover
4. Water pump 5. O-rings 6. Water drain plug (front)
SBIA0482E
PBIC2662E

CO-26
[VQ35DE]
WATER PUMP
Revision: 2006 January2006 M35/M45
b. 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.
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:
JLC357B
SLC943A
PBIC1397E
PBIC1058E

CO-28
[VQ35DE]
WATER PUMP
Revision: 2006 January2006 M35/M45
b. Apply a continuous bead of liquid gasket with tube presser [SST:
WS39930000 ( — )] to mating surface of chain tensioner
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.
PBIC2663E

WATER INLET AND THERMOSTAT ASSEMBLY
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Revision: 2006 January2006 M35/M45
WATER INLET AND THERMOSTAT ASSEMBLYPFP:21200
ComponentsNBS004R3
Removal and InstallationNBS004R4
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove air duct (inlet). Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
3. Remove front engine undercover using power tool.
4. 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-24, "WATER PUMP" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine coolant on drive belts.
5. Disconnect radiator hose (lower) and oil cooler water hose from water inlet and thermostat assembly.
6. Remove water inlet and thermostat assembly.
CAUTION:
Do not disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.
1. Water inlet and thermostat assembly 2. Gasket
SBIA0483E
SLC962AB