radiator cap NISSAN TEANA 2008 Service Manual

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ENGINE
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SECTION CO
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CONTENTS
ENGINE COOLING SYSTEM
FUNCTION DIAGNOSIS .. .............................2
DESCRIPTION ............................................... .....2
Engine Cooling System ..................................... ......2
Engine Cooling System Schematic .........................2
SYMPTOM DIAGNOSIS ...............................3
OVERHEATING CAUSE ANALYSIS ............. .....3
Troubleshooting Chart ........................................ ......3
PRECAUTION ...............................................5
PRECAUTIONS .............................................. .....5
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
5
Liquid Gasket ...........................................................5
PREPARATION ............................................7
PREPARATION .............................................. .....7
Special Service Tool ........................................... ......7
Commercial Service Tools .......................................7
ON-VEHICLE MAINTENANCE .....................8
ENGINE COOLANT ....................................... .....8
Inspection ............................................................ ......8
Draining .....................................................................8
Refilling .....................................................................9
Flushing ...................................................................10
RADIATOR .........................................................12
RADIATOR CAP .................................................... ....12
RADIATOR CAP : Inspection ..................................12
RADIATOR ............................................................ ....12
RADIATOR : Inspection ..........................................12
ON-VEHICLE REPAIR .................................13
RADIATOR ....... ................................ .................13
Exploded View ..................................................... ....13
Removal and Installation .........................................13
Inspection ................................................................15
COOLING FAN ..................................................16
Exploded View .........................................................16
Removal and Installation .........................................16
Disassembly and Assembly .....................................17
Inspection ................................................................17
WATER PUMP ..................................................18
Exploded View .........................................................18
Removal and Installation .........................................18
Inspection ................................................................21
WATER INLET AND THERMOSTAT ASSEM-
BLY ....................................................................
23
Exploded View .........................................................23
Removal and Installation .........................................23
Inspection ................................................................24
WATER OUTLET AND WATER PIPING ..........25
Exploded View .........................................................25
Removal and Installation .........................................25
Inspection ................................................................26
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
27
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
27
Periodical Maintenance Specification .................. ....27
Radiator ...................................................................27
Thermostat ..............................................................27

OVERHEATING CAUSE ANALYSIS
CO-3
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000003793161
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or pa-
per 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 density —
Insufficient engine coolantEngine coolant leakageCooling 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 leakage into
cooling systemCylinder head deterioration
Cylinder head gasket deteri-
oration

PREPARATION
CO-7
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000003793164
Commercial Service ToolsINFOID:0000000003793165
Tool number
(SPX North America No.)
Tool nameDescription
K V 1 0 1111 0 0
(J37228)
Seal cutterRemoving water pump cover
NT046
Tool nameDescription
Tube presser Pressing the tube of liquid gasket
Power toolLoosening nuts and bolts
Radiator cap tester Checking radiator and radiator cap
Radiator cap tester adapter Adapting radiator cap tester to radiator cap
and radiator pipe (upper) filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
S-NT052
PBIC0190E
PBIC1982E
S-NT564

CO-8
< ON-VEHICLE MAINTENANCE >
ENGINE COOLANT
ON-VEHICLE MAINTENANCE
ENGINE COOLANT
InspectionINFOID:0000000003793166
LEVEL
 Check if the reservoir tank engine coolant level is within the “MIN”
to “MAX” when the engine is cool.
 Adjust the engine coolant level as necessary.
LEAKAGE
 To check for leakage, apply pressure to the cooling system with the
radiator cap tester (commercial service tool) (A) and radiator cap
tester adapter (commercial service tool) (B).
WARNING:
Never remove radiator cap when engine is hot. Serious burns
could occur from high-pressure engine coolant escaping from
radiator.
CAUTION:
Higher test pressure than specified may cause radiator dam-
age.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.
 If anything is found, repair or replace damaged parts.
DrainingINFOID:0000000003793167
WARNING:
 To avoid being scalded, never change engine coolant when the engine is hot.
 Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a
quarter of a turn to release built-up pressure. Then turn radiator cap all the way.
1. Remove engine under cover.
2. Open radiator drain plug (1) at the bottom of radiator, and then
remove radiator cap.
When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer
to EM-110, "
Disassembly and Assembly".
3. Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.
A: MAX
B: MIN
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Testing pressure : Refer to CO-27, "Radiator".
PBIC5121J
: Vehicle front
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ENGINE COOLANT
CO-9
< ON-VEHICLE MAINTENANCE >
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4. Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to CO-10, "
Flushing".
RefillingINFOID:0000000003793168
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-110, "
Dis-
assembly and Assembly".
2. Check that each hose clamp has been firmly tightened.
3. Remove air duct assembly and air cleaner cases (upper and lower) assembly. Refer to EM-26, "
Exploded
View".
4. Disconnect heater hose (1) at the position ( ) in the figure.
5. Fill radiator, and reservoir tank if removed, to specified level.
CAUTION:
Never adhere the engine coolant to electronic equipments.
(alternator etc.)
Pour engine coolant through engine coolant filler neck
slowly of less than 2 (1-3/4 lmp qt) a minute to allow air
in system to escape.
When engine coolant overflows disconnected heater
hose, connect heater hose, and continue filling the engine
coolant.
Use Genuine NISSAN Engine Coolant or equivalent in its
quality mixed with water (distilled or demineralized). Refer
to MA-11, "
Fluids and Lubricants". Tightening torque : Refer to CO-13, "
Exploded View".
: Vehicle front
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Engine coolant capacity
: Refer to CO-27, "Periodical Maintenance Spec-
ification".
(With reservoir tank at “MAX” level)
Reservoir tank engine coolant capacity
:Refer to CO-27, "
Periodical Maintenance Spec-
ification".
(At “MAX” level)
A : MAX
B: MIN
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CO-10
< ON-VEHICLE MAINTENANCE >
ENGINE COOLANT
6. Install air duct assembly and air cleaner cases (upper and lower) assembly. Refer to EM-26, "Exploded
View".
7. Install radiator cap.
8. Warm up engine until opening thermostat. Standard for warming-up time is approximately 10 minutes at
3,000 rpm.
 Check 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.
9. Stop the 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.
CAUTION:
Never adhere the engine coolant to electronic equipments. (alternator etc.)
10. Refill reservoir tank to “MAX” level line with engine coolant.
11. Repeat steps 7 through 10 two or more times with radiator cap installed until engine coolant level no
longer drops.
12. Check cooling system for leakage with engine running.
13. Warm up the 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.
14. Repeat step 13 three times.
15. If sound is heard, bleed air from cooling system by repeating step 5, and steps from 7 to 14 until engine
coolant level no longer drops.
FlushingINFOID:0000000003793169
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-110, "
Dis-
assembly and Assembly".
2. Remove air duct assembly and air cleaner cases (upper and lower) assembly. Refer to EM-26, "
Exploded
View".
3. Disconnect heater hose (1) at the position ( ) in the figure.
4. Fill radiator and reservoir tank with water and reinstall radiator cap.
CAUTION:
Never adhere the water to electronic equipments. (alternator etc.)
When water overflows disconnected heater hose, connect heater hose, and continue filling the
water.
5. Run the engine and warm it up to normal operating temperature.
6. Rev the engine two or three times under no-load.
7. Stop the engine and wait until it cools down.
8. Drain water from the system. Refer to CO-8, "
Draining". Tightening torque : Refer to CO-13, "
Exploded View".
: Vehicle front
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CO-12
< ON-VEHICLE MAINTENANCE >
RADIATOR
RADIATOR
RADIATOR CAP
RADIATOR CAP : InspectionINFOID:0000000003793170
 Check valve seat (A) of radiator cap.
- Check if valve seat is swollen to the extent that the edge of the
plunger (B) cannot be seen when watching it vertically from the
top.
- Check if valve seat has no soil and damage.
- Check that there is no dirt or damage on the valve seat of radiator
cap negative-pressure valve.
- Check 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 (commer-
cial service tool) and the radiator cap tester adapter (commercial
service tool) (A), 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 radiator pipe (upper) filler neck to remove any
waxy residue or foreign material.
RADIATOR
RADIATOR : InspectionINFOID:0000000003793171
Check radiator for mud or clogging. If necessary, clean radiator as follows:
CAUTION:
 Be careful not to bend or damage radiator fins.
 When radiator is cleaned without removal, remove all surrounding parts such as radiator cooling fan
assembly and horns. Then tape harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces 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 (4.9 bar, 5 kg/cm
2, 71 psi) and keep distance more than 30 cm
(11.81 in).
5. Blow air again into all the radiator core surfaces once per minute until no water sprays out.
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Standard and limit : Refer to CO-27, "Radiator".
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RADIATOR
CO-13
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
RADIATOR
Exploded ViewINFOID:0000000003793172
Removal and InstallationINFOID:0000000003793173
REMOVAL
1. Reservoir tank cap 2. Reservoir tank 3. Clamp
4. Reservoir tank hose 5. Radiator cap 6. Radiator cap adapter
7. Radiator pipe (upper) 8. Clamp 9. Radiator hose (upper)
10. Radiator hose (upper) 11. O-ring 12. Drain plug
13. Water drain hose 14. Mounting rubber (upper) 15. Radiator upper clip
16. Radiator 17. Mounting rubber (lower) 18. Radiator pipe (lower)
19. Radiator hose (lower) 20. Clamp 21. CVT fluid cooler hose
22. CVT fluid cooler hose 23. Grommet 24. Cooling fan assembly
25. Radiator hose (lower)
A. To water outlet B. To transaxle assembly C. To water inlet
Refer to GI-4, "
Components" for symbols in the figure.
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CO-14
< ON-VEHICLE REPAIR >
RADIATOR
WARNING:
Never remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to
release built-up pressure. Carefully remove radiator cap by turning it all the way.
1. Remove the following parts:
 Engine under cover.
 Air duct (inlet): Refer to EM-26, "
Exploded View".
 Horn: Refer to HRN-6, "
Exploded View".
 Hood lock: Refer to DLK-220, "
Exploded View".
2. Drain engine coolant from radiator. Refer to CO-8, "
Draining".
CAUTION:
 Perform this step when the engine is cold.
 Never spill engine coolant on drive belt.
3. Disconnect reservoir tank hose from radiator pipe (upper).
4. Disconnect CVT fluid cooler hoses from radiator.
 Install blind plug to avoid leakage of CVT fluid.
5. Disconnect Low-pressure flexible hose from lower pressure pipe, and then move it to aside. Refer to HA-
38, "Exploded View".
6. Remove radiator cap adapter and radiator hoses (upper) and radiator pipe (upper) assembly.
CAUTION:
Be careful not to allow engine coolant to contact drive belt.
7. Disconnect radiator hose (lower) from radiator.
8. Remove condenser. Refer to HA-46, "
Exploded View".
CAUTION:
Be careful not to damage condenser core.
9. Remove radiator upper clip (2) by pulling the tabs (A) outside to
release the lock (B) and then remove mounting rubbers (upper)
(1).
CAUTION:
Never pull the tabs outside excessively to prevent it from
damping.
10. Lift up and remove radiator from front of radiator core support.
CAUTION:
Be careful not to damage or scratch on radiator core.
INSTALLATION
Note the following, and installation is the reverse order of removal.
Radiator Upper Clip
Install radiator upper clip on radiator core connection as follows:
1. Install mounting rubbers (upper) (1) on mounting pins (A) of radi-
ator.
2. Align radiator upper clip (2) with radiator core connection (B),
then insert radiator upper clip straight into radiator core connec-
tions until a click is heard.
3. After connecting radiator upper clip, use the following method to
check it is fully connected.
 Visually confirm that two radiator upper clips are connected to
radiator core connections.
 Move radiator upper clip and the radiator forward and backward to check they are securely connected.
C : Mounting pin
: Vehicle front
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: Vehicle front
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RADIATOR
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InspectionINFOID:0000000003793174
INSPECTION AFTER INSTALLATION
 Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to CO-8, "
Inspection".
 Start and warm up the engine. Visually check that there is no leakage of engine coolant and CVT fluid.