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ENGINE COOLING SYSTEM

B ENGINE

CO
SECTION
ENGINE COOLING SYSTEM C

E
CONTENTS
CR THERMOSTAT ......................................................... 23
. F
Removal and Installation ....................................... 23
.
PRECAUTIONS ......................................................... 3. REMOVAL .......................................................... 23
.
Precautions For Liquid Gasket ................................ 3 . INSPECTION AFTER REMOVAL ...................... 23 . G
REMOVAL OF LIQUID GASKET SEALING ......... 3 . INSTALLATION .................................................. 24
.
LIQUID GASKET APPLICATION PROCEDURE 3 ..... SERVICE DATA AND SPECIFICATIONS (SDS) ..... 25 .
PREPARATION .......................................................... 4
. Standard and Limit ................................................. 25
.
Special Service Tools .............................................. 4. H
CAPACITY .......................................................... 25
.
OVERHEATING CAUSE ANALYSIS ......................... 5 . THERMOSTAT ................................................... 25
.
Troubleshooting Chart ............................................. 5 . RADIATOR ......................................................... 25
.
COOLING SYSTEM ................................................... 7 . Tightening Torque .................................................. 25
. I
Cooling Circuit ......................................................... 7
.
ENGINE COOLANT ................................................... 8 .
Inspection ................................................................ 8
.
K9K
J
LEVEL CHECK .................................................... 8 . PRECAUTIONS ....................................................... 26 .
LEAK CHECK ...................................................... 8 . Precautions For Liquid Gasket .............................. 26 .
Changing Engine coolant ........................................ 8 . REMOVAL OF LIQUID GASKET ........................ 26 .
DRAINING ENGINE COOLANT .......................... 8 . K
LIQUID GASKET APPLICATION PROCEDURE 26 ...
REFILLING ENGINE COOLANT ......................... 8 . PREPARATION ........................................................ 27.
FLUSHING COOLING SYSTEM ........................ 10 . Special Service Tools ............................................ 27 .
RADIATOR ................................................................11
. OVERHEATING CAUSE ANALYSIS ....................... 28 . L
Removal and Installation ........................................11 . Troubleshooting Chart ........................................... 28 .
REMOVAL .......................................................... 12
. COOLING SYSTEM ................................................. 30 .
INSTALLATION .................................................. 14 . Cooling Circuit ....................................................... 30
. M
Disassembly and Assembly of Cooling Fan .......... 14 . ENGINE COOLANT ................................................. 31 .
DISASSEMBLY .................................................. 15 . Inspection .............................................................. 31
.
ASSEMBLY ........................................................ 15. LEVEL CHECK ................................................... 31 .
Checking Radiator Cap ......................................... 15 . LEAK CHECK ..................................................... 31 .
Checking Radiator ................................................. 16. Changing Engine Coolant ...................................... 32 .
Checking Cooling System Hoses .......................... 16 . DRAINING ENGINE COOLANT ......................... 32 .
RADIATOR (ALUMINUM TYPE) ............................. 17 . REFILLING ENGINE COOLANT ........................ 32 .
Disassembly and Assembly .................................. 17 . FLUSHING COOLING SYSTEM ........................ 33 .
PREPARATION .................................................. 17 . RADIATOR ............................................................... 34
.
DISASSEMBLY .................................................. 17 . Removal and Installation ....................................... 34 .
ASSEMBLY ........................................................ 18. REMOVAL .......................................................... 35
.
INSPECTION ..................................................... 20 . INSTALLATION .................................................. 36 .
WATER PUMP ......................................................... 21. Disassembly and Assembly Radiator Fan ............. 36 .
Removal and Installation ....................................... 21 . DISASSEMBLY .................................................. 37 .
REMOVAL .......................................................... 21
. ASSEMBLY ........................................................ 38.
INSPECTION AFTER REMOVAL ...................... 22 .
INSTALLATION .................................................. 22 .

CO-1
Checking Reservoir Tank Cap ............................... 38 . THERMOSTAT ..........................................................41 .
Checking Radiator ................................................. 38
. Inspection ...............................................................41
.
WATER PUMP .......................................................... 39
. WATER OUTLET ......................................................42 .
Removal and Installation ....................................... 39
. Removal and Installation ...................................... ..42 .
REMOVAL .......................................................... 39
. REMOVAL ...........................................................42.
INSPECTION AFTER REMOVAL ....................... 39 . INSTALLATION ...................................................42 .
INSTALLATION ................................................... 40
.
INSPECTION AFTER INSTALLATION ............... 40 .

CO-2
PRECAUTIONS
[CR]
PRECAUTIONS
[CR] PFP:00001
A
Precautions For Liquid Gasket EBS00OJI

REMOVAL OF LIQUID GASKET SEALING
q After removing the mounting bolts and nuts, separate the mating CO
surface using a seal cutter and remove the liquid gasket.
CAUTION:
Be careful not to damage the mating surfaces.
C
q In areas where the seal cutter is difficult to use, use a plastic
hammer to lightly tap the gasket area.
CAUTION:
D
If for some unavoidable reason a tool such as a flat-bladed
screwdriver is used, be careful not to damage the mating sur-
faces.
PBIC0275E
E
LIQUID GASKET APPLICATION PROCEDURE
1. Using a scraper, remove the old liquid gasket adhering to the
gasket application surface and the mating surface. F
q Remove the liquid gasket completely from the groove of the gas-
ket application surface, mounting bolts and bolt holes.
2. Wipe the gasket application surface and the mating surface with G
white gasoline (lighting and heating use) to remove adhering
moisture, grease and foreign materials.
3. Attach the liquid gasket to the tube presser. H
Use Genuine Liquid Gasket or equivalent.
PBIC0003E

I
4. Apply the gasket without breaks to the specified location with the
specified dimensions.
q If there is a groove for the liquid gasket application, apply the J
gasket to the groove.

L
EMA0622D

q As for the bolt holes, normally apply the gasket inside the holes. M
Occasionally, it should be applied outside the holes. Make sure
to read the instruction in this manual.
q Within five minutes of gasket application, install the mating com-
ponent.
q If the liquid gasket protrudes, wipe it off immediately.
q Do not retighten after the installation.
q After 30 minutes or more have passed from the installation, fill
the engine oil and coolant.
CAUTION: SEM164F
If there are additional instructions in this manual, observe them.

CO-3
PREPARATION
[CR]
PREPARATION PFP:00002

Special Service Tools SMA for VIN>SJN**AK12U1000000 EBS00OJJ

Tool number
Description
Tool name

WS39930000 Pressing the tube of liquid gasket
Tube presser

S-NT052

EG17650301 Adapting radiator cap tester to radiator filler
Radiator cap tester adapter neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

S-NT564

KV99103510 Installing radiator upper and lower tanks
Radiator plate pliers A

S-NT224

KV99103520 Removing radiator upper and lower tanks
Radiator plate pliers B

S-NT225

CO-4
OVERHEATING CAUSE ANALYSIS
[CR]
OVERHEATING CAUSE ANALYSIS PFP:00012
A
Troubleshooting Chart EBS00OIR

Symptom Check items
Water pump malfunction Worn or loose drive belt CO
Thermostat stuck closed --
Dust contamination or
C
Poor heat transfer Damaged fins paper clogging --
Mechanical damage
Clogged radiator cooling Excess foreign material D
tube (rust, dirt, sand, etc.)
Cooling fan does not oper-
ate
E
Reduced air flow High resistance to fan rota- Fan assembly --
tion
Damaged fan blades
F
Damaged radiator shroud -- -- --
Improper coolant mixture
Cooling sys- -- -- --
ratio G
tem parts
malfunction Poor coolant quality -- Coolant viscosity --
Loose clamp
Cooling hose H
Cracked hose
Water pump Poor sealing
Loose
Radiator cap I
Poor sealing
Coolant leaks
O-ring for damage, deterio-
Insufficient coolant ration or improper fitting J
Radiator
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank K
Cylinder head deterioration
Exhaust gas leaks into
Overflowing reservoir tank Cylinder head gasket dete-
cooling system L
rioration

CO-5
OVERHEATING CAUSE ANALYSIS
[CR]
Symptom Check items
High engine rpm under no
load
Driving in low gear for
Abusive driving
extended time
Driving at extremely high
speed
-- Overload on engine
Powertrain system mal-
function
Installed improper size
Except cool- --
wheels and tires
ing system
parts mal- Dragging brakes
function
Improper ignition timing
Blocked bumper --
Installed car brassiere
Blocked radiator grille Mud contamination or
Blocked or restricted air paper clogging --
flow
Blocked radiator --
Blocked condenser
Blocked air flow
Installed large fog lamp

CO-6
COOLING SYSTEM
[CR]
COOLING SYSTEM PFP:21020
A
Cooling Circuit EBS00OIS

PBIC1475E

CO-7
ENGINE COOLANT
[CR]
ENGINE COOLANT PFP:KQ100

Inspection SMA for VIN>SJN**AK12U1000000 EBS00OJK

LEVEL CHECK
q Check if the reservoir tank coolant level is within MIN to MAX
when engine is cool.
q Drain or refill coolant when it is too much or too little.

SMA412B

LEAK CHECK
q To check for leakage, apply pressure to the cooling system with
a tester.

Testing pressure : 157 kPa (1.57 bar, 1.6 kg/cm2 , 23 psi)
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure coolant escaping from
the radiator.
CAUTION:
Higher pressure than specified may cause radiator damage.
SLC134B

Changing Engine coolant EBS00OIV

WARNING:
q To avoid being scalded, never change the coolant when the engine is hot.
q Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn
to release built-up pressure. Then turn the cap all the way.
DRAINING ENGINE COOLANT
1. Disconnect radiator lower hose and radiator cap.
CAUTION:
q Make sure to drain when the engine coolant temperature is cold.

q Be careful not to allow coolant to contact drive belts.

2. Remove reservoir tank and drain the engine coolant in the fol-
lowing procedures.
a. Move relay case in front of the battery.
b. Disconnect the reservoir tank from fan shroud to remove. With
force applied in the left direction of vehicle, pull up reservoir
tank.
3. Check drain coolant for contaminants such as rust, corrosion or
discoloration.
If contaminated, flush engine cooling system. Refer to CO-10,
"FLUSHING COOLING SYSTEM" .
PBIC1476E

REFILLING ENGINE COOLANT
1. Install reservoir tank.
2. Connect radiator lower hose.

CO-8
ENGINE COOLANT
[CR]
3. Disconnect heater hose (at heater hose outlet side: upper side)
as shown in figure. Keep hose end at the same height as that of A
before removal.

PBIC1477E

D
4. Fill radiator and reservoir tank to specified level.
q Pour coolant slowly of less than 2 (1-3/4 lmp qt) a
minute to allow air in system to escape. E
q When coolant from heater hose starts to drain, connect
heater hose and continue to fill.
q Use Genuine Nissan Anti-freeze Coolant or equivalent F
mixed with water (distilled or demineralized).
Refer to MA-18, "RECOMMENDED FLUIDS AND LUBRI-
CANTS".
G
Engine coolant capacity (With reservoir tank): SMA182B

Except M/T models with A/C
: Approx. 4.9 (4-3/8 Imp qt) H
M/T models with A/C
: Approx. 5.3 (4-5/8 lmp qt)
I

Reservoir tank:
Except M/T models with A/C : 0.7 (5/8 lmp qt) J
M/T models with A/C : 1.2 (1-1/8 lmp qt)

SMA412B

M
5. Warm up engine to normal operating temperature with radiator cap installed.
6. Warm up until thermostat opens. Keep warming at 3,000 rpm for approximately 10 minutes as guide.
q For thermostat opening, touch radiator upper hose by hand to insure that water flow is hot.

CAUTION:
Be careful not to overheat.
7. Stop the engine.
8. After cooling engine [approximately 50

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