radiator NISSAN 350Z 2007 Z33 Engine Cooling System User Guide

RADIATOR
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INSTALLATION
Installation is the reverse order of removal.
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 and A/T fluid.
Checking Radiator Cap NBS0001X

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 is
completely closed 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) (A) and the radiator cap tester adapter
(commercial service tool) (B), 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 filler neck to remove any waxy residue or foreign
material.
Checking Radiator NBS0001Y
Check radiator for mud or clogging. If necessary, clean radiator as follows.

Be careful not to bend or damage the radiator fins.

When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape harness and electrical connectors to prevent water from entering.
1. Apply water by hose to the back side of radiator core vertically downward.
PBIC2816E
SMA967B
Standard:
108 - 127 kPa (1.1 - 1.3 kg/cm
2 , 16 - 18 psi)
Limit:
88 kPa (0.9 kg/cm
2 , 13 psi)
PBIC5122J

CO-16
RADIATOR
Revision: 2006 November2007 350Z
2. Apply water again to all radiator core surface once per minute.
3. Stop washing if any stains no longer flow out from radiator.
4. Blow air into the back side of radiator core vertically downward.

Use compressed air lower than 490 kPa (5 kg/cm2 , 71 psi) and keep distance more than 30 cm (11.8
in).
5. Blow air again into all the radiator core surfaces once per minute until no water sprays out.

RADIATOR (ALUMINUM TYPE)
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RADIATOR (ALUMINUM TYPE)PFP:21460
Disassembly and AssemblyNBS0001Z

Refer to GI-11, "Components" for symbol marks in the figure.
PREPARATION
1. Attach spacer to tip of radiator plate pliers A (SST).
Spacer specification: 18 mm (0.71 in) wide × 8.5 mm (0.335 in)
long × 1.5 mm (0.059 in) thick.
2. Make sure that when radiator plate pliers A [SST: KV99103510 ( — )] are closed dimension H′′ is
approx. 7.6 mm (0.299 in).
3. Adjust dimension H′′ with spacer, if necessary.
DISASSEMBLY
1. Remove upper and lower tanks with radiator plate pliers B
(SST).
CAUTION:
Do not disassemble lower tank and A/T fluid cooler. (A/T
models)
NOTE:
Regard lower tank and A/T fluid cooler as an assembly. (A/T
models)
1. Upper tank 2. Sealing rubber 3. Core
4. Lower tank 5. Lower tank (with A/T fluid cooler)
A. A/T models
PBIC5033E
SLC655CB
SLC903-A

CO-18
RADIATOR (ALUMINUM TYPE)
Revision: 2006 November2007 350Z

Grip the crimped edge and bend it upwards so that radiator
plate pliers B [SST: KV99103520( — )] slips off.
CAUTION:
Do not bend excessively.

In areas where radiator plate pliers B [SST: KV99103520( —
)] cannot be used, use screwdriver to bend the edge up.
CAUTION:
Be careful not to damage tank.
2. Remove sealing rubber.
3. Make sure the edge stands straight up.
ASSEMBLY
1. Clean contact portion of tank.
SLC893
SLC930
SLC931
SLC932

RADIATOR (ALUMINUM TYPE)
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2. Install sealing rubber while pushing it with fingers.
CAUTION:
Be careful not to twist sealing rubber.
3. Caulk tank in numerical order as shown in the figure with radia-
tor plate pliers A (SST).

Use pliers in the locations where radiator plate pliers A [SST:
KV99103510 ( — )] cannot be used.
SLC917A
SLC904-A
PBIC2076E
SLC897

CO-20
RADIATOR (ALUMINUM TYPE)
Revision: 2006 November2007 350Z
4. Make sure that the rim is completely crimped down.
5. Make sure that there is no leakage.
Refer to CO-20, "
INSPECTION" .
INSPECTION
1. Apply pressure with radiator cap tester adapter (commercial ser-
vice tool) and radiator cap tester (commercial service tool).

Provide used radiator and connect it to tested radiator using
radiator hoses as shown in the figure.
NOTE:
The used radiator should be tested beforehand to confirm it
has no leakage. If used one is not available, it is possible to
use new service part as a radiator testing tool.
WARNING:
To prevent the risk of hose coming undone while under pressure, securely fasten it down with
hose clamp.
CAUTION:
Attach hose to A/T fluid cooler to seal its inlet and outlet.
(A/T models)
2. Check for leakage by soaking radiator in water container with
the testing pressure applied.Standard height “H” : 8.0 - 8.4 mm (0.315 - 0.331 in)
SLC554A
Testing pressure
: 157 kPa (1.6 kg/cm
2 , 23 psi)PBIC5158E
PBIC1699E

COOLING FAN
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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

WATER PUMP
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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

WATER PUMP
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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