NISSAN 350Z 2007 Z33 Engine Cooling System Owner's Manual

COOLING FAN
CO-21
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2006 November2007 350Z
COOLING FANPFP:21140
Removal and InstallationNBS00020
REMOVAL
1. Remove engine cover with power tool. Refer to EM-17, "INTAKE MANIFOLD COLLECTOR" .
2. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air cleaner case assembly (RH, LH). Refer to EM-15, "
AIR CLEANER AND AIR DUCT" .
4. Remove reservoir tank. Refer to CO-13, "
RADIATOR" .
5. Disconnect radiator hose (upper) at radiator side. Refer to CO-13, "
RADIATOR" .
6. Disconnect fan motor harness connectors at the right-lower por-
tion of fan shroud.
7. Remove mounting bolts to lift up and radiator cooling fan assembly.
CAUTION:
Be careful not to damage or scratch on radiator core.
INSTALLATION
Installation is the reverse order of removal.
NOTE:
Cooling fans are controlled by ECM. For details, refer to EC-543, "
DTC P1217 ENGINE OVER TEMPERA-
TURE" .
1. Cooling fan (RH) 2. Cooling fan (LH) 3. Fan shroud
4. Fan motor
PBIC2609E
PBIC1935E

CO-22
COOLING FAN
Revision: 2006 November2007 350Z
Disassembly and Assembly NBS00021
DISASSEMBLY
1. Remove cooling fans (RH and LH) from fan motors.
2. Remove fan motors from fan shroud.
INSPECTION AFTER DISASSEMBLY
Cooling Fan
Inspect cooling fan for crack or unusual bend.

If anything is found, replace cooling fan.
ASSEMBLY
Assembly is the reverse order of disassembly.
CAUTION:
RH and LH cooling fans are different. Be careful not to misassemble them.

WATER PUMP
CO-23
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2006 November2007 350Z
WAT E R P U MPPFP:21020
Removal and InstallationNBS00022

Refer to GI-11, "Components" for symbol marks in the figure.
CAUTION:

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

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 radiator
cap tester (commercial service tool) and radiator cap tester adapter (commercial service tool).
REMOVAL
1. Remove front timing chain case. Refer to EM-44, "FRONT TIMING CHAIN CASE" .
2. Remove timing chain tensioner (primary) as follows:
a. Remove lower mounting bolt (1).
b. Loosen upper mounting bolt (2) slowly, and then turn chain ten-
sioner (primary) (3) on the upper mounting bolt so that plunger
(4) is fully expanded.
NOTE:
Even if plunger is fully expanded, it is not dropped from the body
of timing chain tensioner (primary).
c. Remove upper mounting bolt, and then remove timing chain tensioner (primary).
3. Remove water pump as follows:
a. Remove three water pump mounting bolts. Secure a gap between water pump gear and timing chain, by
turning crankshaft counterclockwise until timing chain looseness on water pump sprocket becomes maxi-
mum.
1. Timing chain tensioner (primary) 2. Water pump 3. O-ring
4. O- ring
A. Identify with yellow paint mark B.Identify with light blue paint mark
Apply engine coolant
PBIC5030E
PBIC4938E

CO-24
WATER PUMP
Revision: 2006 November2007 350Z
b. Screw M8 bolts (A) [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 (1).
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 (1).
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.

Replace water pump, if necessary.
INSTALLATION
1. Install new O-rings to water pump.

Apply engine oil to O-rings (1) and engine coolant to O-ring
(3) as shown in the figure.

Locate O-ring (1) with yellow paint mark (A) to engine front
side.

Locate O-ring (3) with light blue paint mark (B) to rear side.
2. Install water pump.
CAUTION:
Do not allow cylinder block to nip O-rings when installing water pump.

Make sure that 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. Turn crankshaft clockwise so that timing chain on the timing chain tensioner (primary) side is loose.
PBIC4939E
SLC943A
2 : Water pump
PBIC5074E

WATER PUMP
CO-25
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2006 November2007 350Z
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 in the reverse order of removal after this step.

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 (commercial service tool) and radiator
cap tester (commercial service tool). Refer to CO-10, "
LEAK CHECK" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant.
PBIC3568E

CO-26
WATER INLET AND THERMOSTAT ASSEMBLY
Revision: 2006 November2007 350Z
WATER INLET AND THERMOSTAT ASSEMBLYPFP:21200
Removal and InstallationNBS00023

Refer to GI-11, "Components" for symbol marks in the figure.
REMOVAL
1. Remove undercover with power tool.
2. Drain engine coolant from radiator drain plug at the bottom of radiator. Refer to CO-10, "
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 (LH). Refer to EM-15, "
AIR CLEANER AND AIR DUCT" .
4. Disconnect radiator hose (lower) from water inlet and thermostat assembly.
5. Remove intake valve timing control solenoid.
6. Remove water inlet and thermostat assembly.
CAUTION:
Do not disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.
INSPECTION AFTER REMOVAL
1. Check valve seating condition at ordinary room temperatures. It should seat tightly.
1. Gasket 2. Water inlet and thermostat assembly
PBIC4940E
SLC962AB

WATER INLET AND THERMOSTAT ASSEMBLY
CO-27
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2006 November2007 350Z
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 radiator cap tester adapter (commercial service tool) and radiator
cap tester (commercial service tool). Refer to CO-10, "
LEAK CHECK" .

Start and warm up engine. Visually make sure that there is no leaks of engine coolant.
Thermostat Standard
Valve opening temperature 82°C (180°F)
Maximum valve lift 9.0 mm / 95°C (0.354 in / 203°F)
Valve closing temperature 77°C (171°F)
SLC949A

CO-28
WATER OUTLET AND WATER PIPING
Revision: 2006 November2007 350Z
WATER OUTLET AND WATER PIPINGPFP:11060
Removal and InstallationNBS00024

Refer to GI-11, "Components" for symbol marks in the figure.
REMOVAL
1. Remove 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-10, "
Changing Engine Coolant" and CO-23, "WATER PUMP" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
3. Remove engine cover with power tool. Refer to EM-17, "
INTAKE MANIFOLD COLLECTOR" .
4. Remove air duct and air cleaner case (RH, LH). Refer to EM-15, "
AIR CLEANER AND AIR DUCT" .
5. Remove radiator hose (upper), heater hoses and water hoses.
6. Remove the following parts, when remove water outlet.

A/T fluid charging pipe (A/T models): Refer to AT- 2 4 2 , "TRANSMISSION ASSEMBLY" .

Intake manifold collector: Refer to EM-17, "INTAKE MANIFOLD COLLECTOR" .
7. Remove engine coolant temperature sensor as necessary.
1. Clamp 2. Water hose 3. Water outlet (rear)
4. Gasket 5. Washer 6. Engine coolant temperature sensor
7. O-ring 8. Water outlet pipe 9. Water outlet (front)
10. Clamp 11. Radiator hose (upper) 12. Gasket
13. Heater pipe 14. Clamp 15. Water hose
16. Clamp 17. Heater hose 18. Water bypass pipe
19. O-ring 20. Heater hose
A. To EVAP piping B. To heater core C. To radiator
D. To electric throttle control actuator
PBIC5134E

WATER OUTLET AND WATER PIPING
CO-29
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2006 November2007 350Z
CAUTION:
Be careful not to damage engine coolant temperature sensor.
8. Remove oil level gauge and guide. Refer to EM-44, "
FRONT TIMING CHAIN CASE" .
9. Remove water outlet, heater pipe, water bypass hoses and water pipe.
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 radiator cap tester adapter (commercial service tool) and radiator
cap tester (commercial service tool). Refer to CO-10, "
LEAK CHECK" .

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

CO-30
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2006 November2007 350Z
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00100
Standard and LimitNBS00025
ENGINE COOLANT CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
RADIATOR
Unit: kPa (kg/cm2 , psi)
THERMOSTAT
Engine coolant capacity (With reservoir tank at “MAX” level) 9.0 (9-1/2, 7- 7/8)
Reservoir tank engine coolant capacity (At “MAX” level) 0.8 (7/8, 3/4)
Cap relief pressureStandard 108 - 127 (1.1 - 1.3, 16 - 18)
Limit 88 (0.9, 13)
Leakage test pressure157 (1.6, 23)
Valve opening temperature 82°C (180°F)
Maximum valve lift 9.0 mm / 95°C (0.354 in / 203°F)
Water closing temperature 77°C (171°F)