heater NISSAN 350Z 2007 Z33 Engine Cooling System Workshop Manual

ENGINE COOLANT
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Revision: 2006 November2007 350Z
3. Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.
4. Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to CO-12, "
FLUSHING COOLING SYSTEM" .
REFILLING ENGINE COOLANT
1. Install reservoir tank if removed, and radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring.
If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-111,
"ASSEMBLY" .
2. Make sure that each hose clamp has been firmly tightened.
3. Remove air relief plug (1) on heater hose.
4. Fill radiator and reservoir tank to specified level.

Pour engine coolant through engine coolant filler neck
slowly of less than 2 (2-1/8 US qt, 1-3/4 lmp qt) a minute
to allow air in system to escape.

Use Genuine NISSAN Long Life Antifreeze/Coolant or
equivalent mixed with water (distilled or demineralized).
Refer to MA-11, "
RECOMMENDED FLUIDS AND LUBRI-
CANTS".

When engine coolant overflows air relief hole on heater hose,
install air relief plug with new O-ring.
5. Install radiator cap.
6. Warm up until opening thermostat. Standard for warming-up time is approximately 10 minutes at 3,000
rpm.

Make sure thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.
CAUTION:
Watch water temperature gauge so as not to overheat engine.Radiator drain plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)
2 : Heater hose
: Vehicle front
PBIC5029E
Engine coolant capacity
(with reservoir tank at “MAX” level)
: Approx. 9.0 (9 - 1/2 US qt, 7- 7/8 lmp qt)
PBIC5073E
Reservoir tank capacity (at “MAX” level)
: 0.8 (7/8 US qt, 3/4 lmp qt)
Air relief plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)
SMA412B

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ENGINE COOLANT
Revision: 2006 November2007 350Z
7. Stop engine and cool down to less than approximately 50°C (122°F).

Cool down using fan to reduce the time.

If necessary, refill radiator up to filler neck with engine coolant.
8. Refill reservoir tank to “MAX” level line with engine coolant.
9. Repeat steps 4 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops.
10. Check cooling system for leaks with engine running.
11. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between “COOL” and “WARM”.

Sound may be noticeable at heater unit.
12. Repeat step 11 three times.
13. If sound is heard, bleed air from cooling system by repeating step 4 through 7 until engine coolant level no
longer drops.
FLUSHING COOLING SYSTEM
1. Install reservoir tank if removed, and radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring.
If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-111,
"ASSEMBLY" .
2. Remove air relief plug (1) on heater hose.
3. Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap.
4. Run engine and warm it up to normal operating temperature.
5. Rev engine two or three times under no-load.
6. Stop engine and wait until it cools down.
7. Drain water from the system. Refer to CO-10, "
DRAINING ENGINE COOLANT" .
8. Repeat steps 1 through 7 until clear water begins to drain from radiator.Radiator drain plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)
2 : Heater hose
: Vehicle front
PBIC5029E
Air relief plug:
: 1.2 N·m (0.12 kg-m, 11 in-lb)

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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
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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.