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WATER PUMP
Revision: 2007 April2007 M35/M45
WATE R P U M PPFP:21020
ComponentsNBS004R1
Removal and InstallationNBS004R2
CAUTION:
When removing water pump assembly, be careful not to g INFINITI M35 2007 Factory Service Manual CO-24
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WATER PUMP
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WATE R P U M PPFP:21020
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Removal and InstallationNBS004R2
CAUTION:
When removing water pump assembly, be careful not to g](/manual-img/42/57024/w960_57024-1384.png)
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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 (commercial service
tool).
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-15, "ENGINE ROOM COVER" .
2. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-19, "
AIR CLEANER AND AIR DUCT"
.
3. Remove front engine undercover with power tool.
4. Remove drive belts. Refer to EM-16, "
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)
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8. Remove timing chain tensioner (primary) as follows:
a. Remove lower mounting bolt.
CAUTION:
Be careful not to drop mounting bolt inside timing chain
case.
b. Loosen upper mounting bolt slowly, and then turn chain ten-
sioner (primary) on the mounting bolt so that plunger is fully
expanded.
NOTE:
Even if plunger is fully expanded, it is not dropped from the body
of timing chain tensioner (primary).
c. Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.
d. Remove upper mounting bolt, and then remove timing chain ten-
sioner (primary).
CAUTION:
Be careful not to drop mounting bolt inside timing chain
case.
9. Remove water pump as follows:
a. Remove three water pump mounting bolts. Secure a gap
between water pump gear and timing chain, by turning crank-
shaft pulley counterclockwise until timing chain looseness on
water pump sprocket becomes maximum.
PBIC3575E
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WATER PUMP
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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 INFINITI M35 2007 Factory Service Manual CO-26
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WATER PUMP
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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](/manual-img/42/57024/w960_57024-1386.png)
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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
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a. Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.
b INFINITI M35 2007 Factory Service Manual WATER PUMP
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a. Turn crankshaft pulley clockwise so that timing chain on the tim-
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b](/manual-img/42/57024/w960_57024-1387.png)
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a. Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.
b. Pull plunger stopper tab up (or turn lever downward) so as to
remove plunger stopper tab from the ratchet of plunger.
NOTE:
Plunger stopper tab and lever are synchronized.
c. Push plunger into the inside of tensioner body.
d. Hold plunger in the fully compressed position by engaging
plunger stopper tab with the tip of ratchet.
e. To secure lever, insert stopper pin through hole of lever into ten-
sioner body hole.
The lever parts and the tab are synchronized. Therefore, the
plunger will be secured under this condition.
NOTE:
Figure shows the example of 1.2 mm (0.047 in) diameter thin screwdriver being used as the stopper pin.
f. Install timing chain tensioner (primary).
Remove dust and foreign material completely from backside of timing chain tensioner (primary) and
from installation area of rear timing chain case.
g. Remove stopper pin.
h. 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 scraper. Also remove traces of old liquid gasket from the
mating surface of front timing chain case.
PBIC1805E
PBIC3568E
PBIC3577E
SLC446B
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WATER PUMP
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b. Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to mating surface of chain tensioner
cover and water INFINITI M35 2007 Factory Service Manual CO-28
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WATER PUMP
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b. Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to mating surface of chain tensioner
cover and water](/manual-img/42/57024/w960_57024-1388.png)
CO-28
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WATER PUMP
Revision: 2007 April2007 M35/M45
b. Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to mating surface of chain tensioner
cover and water pump cover.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-47, "
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-47, "
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 (commercial service tool) 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.
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Refer to GI-11, "Componen INFINITI M35 2007 Factory Service Manual WATER INLET AND THERMOSTAT ASSEMBLY
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Refer to GI-11, "Componen](/manual-img/42/57024/w960_57024-1389.png)
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ComponentsNBS004R3
Refer to GI-11, "Components" for symbols in the figure.
Removal and InstallationNBS004R4
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-15, "ENGINE ROOM COVER" .
2. Remove air duct (inlet). Refer to EM-19, "
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
A. To oil cooler
PBIC5002E
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WATER INLET AND THERMOSTAT ASSEMBLY
Revision: 2007 April2007 M35/M45
INSPECTION AFTER REMOVAL
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2. INFINITI M35 2007 Factory Service Manual CO-30
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WATER INLET AND THERMOSTAT ASSEMBLY
Revision: 2007 April2007 M35/M45
INSPECTION AFTER REMOVAL
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
2.](/manual-img/42/57024/w960_57024-1390.png)
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Revision: 2007 April2007 M35/M45
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 (commercial service tool) 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 82°C (180°F)
Maximum valve lift 8.6 mm/95°C (0.339 in/203°F)
Valve closing temperature 77 °C (171°F)
SLC949A
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Removal and InstallationNBS004R6
REMOV INFINITI M35 2007 Factory Service Manual WATER OUTLET AND WATER PIPING
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Removal and InstallationNBS004R6
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-15, "ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-21, "
INTAKE MANIFOLD COLLECTOR" .
3. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-19, "
AIR CLEANER AND AIR DUCT"
.
4. Remove front engine undercover with power tool.
5. 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.
6. Remove radiator hose (upper) and heater hose.
7. Remove the following parts, when remove water outlet.
A/T fluid charging pipe: Refer to AT- 2 7 4 , "TRANSMISSION ASSEMBLY" .
Intake manifold collectors (upper and lower): Refer to EM-21, "INTAKE MANIFOLD COLLECTOR" .
Rocker cover (right bank): Refer to EM-53, "ROCKER COVER" .
8. Remove engine coolant temperature sensor as necessary.
CAUTION:
Be careful not to damage engine coolant temperature sensor.
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