water pump NISSAN 350Z 2007 Z33 Engine Cooling System Workshop Manual

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ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION CO
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Revision: 2006 November2007 350Z
ENGINE COOLING SYSTEM
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Precautions for Battery Service ................................ 2
Precautions for Liquid Gasket .................................. 2
REMOVAL OF LIQUID GASKET SEALING .......... 2
LIQUID GASKET APPLICATION PROCEDURE ..... 2
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 5
OVERHEATING CAUSE ANALYSIS .......................... 6
Troubleshooting Chart .............................................. 6
COOLING SYSTEM .................................................... 8
Cooling Circuit .......................................................... 8
System Chart ........................................................... 9
ENGINE COOLANT .................................................. 10
Inspection ............................................................... 10
LEVEL CHECK ................................................... 10
LEAK CHECK ..................................................... 10
Changing Engine Coolant ...................................... 10
DRAINING ENGINE COOLANT ......................... 10
REFILLING ENGINE COOLANT ......................... 11
FLUSHING COOLING SYSTEM ......................... 12
RADIATOR ................................................................ 13
Removal and Installation ........................................ 13
REMOVAL ........................................................... 13
INSTALLATION ................................................... 15
INSPECTION AFTER INSTALLATION ............... 15
Checking Radiator Cap .......................................... 15
Checking Radiator .................................................. 15
RADIATOR (ALUMINUM TYPE) .............................. 17
Disassembly and Assembly ................................... 17
PREPARATION ................................................... 17
DISASSEMBLY ................................................... 17
ASSEMBLY ......................................................... 18
INSPECTION ...................................................... 20COOLING FAN .......................................................... 21
Removal and Installation ........................................ 21
REMOVAL ........................................................... 21
INSTALLATION ................................................... 21
Disassembly and Assembly .................................... 22
DISASSEMBLY ................................................... 22
INSPECTION AFTER DISASSEMBLY ................ 22
ASSEMBLY ......................................................... 22
WATER PUMP .......................................................... 23
Removal and Installation ........................................ 23
REMOVAL ........................................................... 23
INSPECTION AFTER REMOVAL ....................... 24
INSTALLATION ................................................... 24
INSPECTION AFTER INSTALLATION ................ 25
WATER INLET AND THERMOSTAT ASSEMBLY .... 26
Removal and Installation ........................................ 26
REMOVAL ........................................................... 26
INSPECTION AFTER REMOVAL ....................... 26
INSTALLATION ................................................... 27
INSPECTION AFTER INSTALLATION ................ 27
WATER OUTLET AND WATER PIPING ................... 28
Removal and Installation ........................................ 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 29
INSPECTION AFTER INSTALLATION ................ 29
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 30
Standard and Limit .................................................. 30
ENGINE COOLANT CAPACITY (APPROXI-
MATE) .................................................................. 30
RADIATOR .......................................................... 30
THERMOSTAT .................................................... 30

CO-4
PREPARATION
Revision: 2006 November2007 350Z
PREPARATIONPFP:00002
Special Service ToolsNBS0001P
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV99103510
(—)
Radiator plate pliers AInstalling radiator upper and lower tanks
KV99103520
(—)
Radiator plate pliers BRemoving radiator upper and lower tanks
KV10111100
(J37228)
Seal cutterRemoving chain tensioner cover and water
pump cover
WS39930000
(—)
Tube presserPressing the tube of liquid gasket
S-NT224
S-NT225
NT046
S-NT052

CO-6
OVERHEATING CAUSE ANALYSIS
Revision: 2006 November2007 350Z
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartNBS0001R
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
Fan assembly — High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio—— —
Poor engine coolant quality — Engine coolant viscosity —
Insufficient engine coolantEngine coolant leaksCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration

WATER PUMP
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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
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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-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