1995 NISSAN ALMERA N15 Service Manual

Oilcooler
Cold startdevice
ENGINE
COOLING SYSTEM
Cooling Circuit

_ ======
=.j
Reservoir tank
I

Oil cooler
Heater unit
~ :By-pass passage
LC-31 SLC407
•

ENGINECOOLING SYSTEM
System Check
WARNING:
Never remove theradiator capwhen theengine ishot; serious
burns couldbecaused byhigh pressure fluidescaping fromthe
radiator.
Wrap athick cloth around capandcarefully loosenita quarter
turn torelease built-uppressure. Thenremove thecap com-
pletely.
CHECKING COOLINGSYSTEMHOSES

Check hosesforimproper attachment, leaks,cracks, damage,
loose connections, chafinganddeterioration.

CHECKING RADIATORCAP

To check radiator cap,apply pressure tocap with atester.

Radiator caprelief pressure:
Standard 78 -98 kPa
(0.78 -0.98 bar,0.8-1.0 kg/cm
2,
11-14 psi)
Limit 59 -98 kPa
(0.59 -0.98 bar, 0.6-1.0 kg/cm
2,
9-14 psi)
SLC613-A
Pullthenegative pressure valvetoopen
it.
Check thatitcloses
completely whenreleased.

CHECKING COOLINGSYSTEMFORLEAKS

To check forleakage, applypressure tothe cooling systemwith
a tester.

Testing pressure:
157 kPa (1.57 bar,1.6kg/cm
2,
23psi)
CAUTION:
Higher thanthespecified pressure maycause radiator damage.
SLC422A LC-32

ENGINECOOLING SYSTEM
Water Pump
REMOVAL ANDINSTALLATION

1. Drain engine coolant fromradiator andcylinder block.
2. Remove upperradiator hose,timing beltcovers, front
engine mounting bracketandtiming belt.
3. Remove timingbelttensioner andidler andtiming belt
lower backcover.

~
Drain plug(Radiator)

4.Remove waterpump.
• For installation, applyliquidgasket towater pumpasshown
in the figure.

2.5:!:0.5
Bolt hRille (0.098:!:0.020r12.5:!: 0.5
die. (0.098:!:0.020)

dIe.
Unit: mm(in) SLC565A
*:
Apply liquidsealant tothe thread.

~/ ~~;>
~/ ~l!.

to.J
M7: 16-20 N.m (1.6-2.0 kg-m, 12-14 ft-Ib)
M8: 16-21 N.m (1.6-2.1 kg-m, 12-15 ft-Ib)

SLC563A
LC-33
•

ENGINECOOLING SYSTEM
Water Pump(Cont'd)
INSPECTION

• Check bodyassembly forrust orcorrosion.
• Check forrough operation duetoexcessive endplay.

SLC760 Thermostat
REMOVAL ANDINSTALLATION

Bolthole
2.5:t0.5(0.098:t 0.020)
die.

\ r
/2.5+0.5

rTfJ ~
(0.098:t 0.020)
die.

SLC564AA

Thermostat
housing

o

a
o

Bolt hole
¥
2.5:t0.5 (0.098:t 0.020)
die.

F2.5+0.5

,-a,
(0.098:t ~.020)die.

From
coldstart device

'I ..

From
01
cooler ..

/

From heater unit~~

2.5+'5
0

:. ••uo.02O)~'28l

Unit: mm(in)

toJ :
N.m (kg-m, ft-Ib)

SEC.
210-211

•Apply liquidgasket towater outlet, thermostat housingand
water inlet.

LC-34

SLC097
•

ENGINE
COOLING SYSTEM
Thermostat (Cont'd)

• Install thermostat withjiggle valveuppermost.

• After installation, runengine forafew minutes, andcheck
for leaks.

Upper

.. Jigglevalve
----¥-

A~ ...
g

~~-

SLC343INSPECTION

1. Check forvalve seating condition atordinary temperatures.
It should seattightly.
2." Check valveopening temperature andvalve lift.
Valve opening temperature
°c
(OF) 88(190)
Valve lift
mmrC
(inrF) Morethan10/100 (0.39/212)
3. Then check ifvalve closes atSOC (9°F) below valveopening
temperature.

Radiator

14

iii :
N'm (kg-m, in-Ib)

~
6.86 (0.70, 60.7)

9

SEC.
214

1i13.7 -5.0

\~~8 _-4~.~~-_ ~
i
1jJ,.7-
5.0 (0.38 -0.51, ".0-
44.')

~ l
~~9
._~1

~@~----
I

~
.
-~

.
~
._~

~~ J'

.~ ~

@
1t1 '''~.
l!jO

~1.5 .82.5
A;:

, (0.15 •0.25,

L
13.0. 21.7)

iii
3.7 •5.0 (0.38 .0.51, 33.0•44.3)

SLC054B

CD
Reservoir tank

@
Reservoir tankbracket

@
Radiator cap

@
Mounting bracket

@
Upper radiator hose
@

Washer

(J)
Radiator drainplug

@
Mounting rubber

@
Radiator

@l
Lower radiator hose
@

Cooling fan
@ Cooling fanmotor

@
Shield spacer

@
Cooling fanmotor shield

LC-35

ENGINECOOLING SYSTEM
@J

Radiator (Cont'd)
Cooling fancontrol system

• Cooling fansarecontrolled bythe ECM. Fordetails, referto
EC section
("Cooling
FanControl", "TROUBLE
DIAGNOSES").

Refilling enginecoolant

• For details onrefilling enginecoolant, refertoMA section
("REFILLING ENGINECOOLANT", "ChangingEngine
Coolant").

LC-36

ENGINECOOLING SYSTEM
I

GA, SR,CD
I

Radiator (Aluminum type)

r
Sealing rubber~

•

SLC882AB
AIT
model only

r

Upper tank
Sealing rubber~

/"""-.

CJ~~ /~.........."-. '-.. ....,
1I

. / -~ '-""", /~Oil coolersecuring nut-

~ ~,>" (
6<,~8 •
12 N.m
(0.8•1.2 kg-m,
69-104
In-Ib)

@
0..~
~>..
!--Conicalwasher~

, ~I"~"-
Washer
/ /~, ,-O-ring~
Lower tank
-.I
I/' ,_
Oil cooler

o

,

SEC.
214

1.5(0.059)

H"
=
7.6
(0.299)

Unit: mm(in)
PREPARATION

1. Attach thespacer tothe tipofthe radiator platepliers A.
Spacer specification: 1.5mm (0.059 in)thick x18 mm (0.71
in) wide x8.5 mm (0.335 in)long.
2. Make surethatwhen radiator platepliers Aare closed
dimension H"isapprox. 7.6mm (0.299 in).
3. Adjust dimension H"with thespacer, ifnecessary.

• Ifthe radiator corerimscannot becrimped asspecified,
further modification ofthe radiator platepliers Ais
required. Refertothe Technical BulletinLC91-001.
SLC655C
D1SASSEMBL Y

1. Remove tankwithTool.
• Grip thecrimped edgeandbend itupwards sothat Tool
slips off.

Do not bend excessively.
*
LC-37

ENGINECOOLING SYSTEM
I
GA, SR,CD
I

Radiator (Aluminum type)(Cont'd)

• Inareas where Toolcannot beused, useascrewdriver to
bend theedge up.

Be careful nottodamage tank.

2. Make suretheedge stands straight up.
3. Remove oilcooler fromtank.
(AfT
models only)

SLC931 ASSEMBLY
1. Install oilcooler.
(AfT
models only)

Pay attention todirection ofconical washer.
~ Conical washer~
SLCB94
2.Clean contact portionoftank.

SLC932
3.Install sealing rubber.

Push itin with fingers.
Be careful nottotwist sealing rubber.
LC-38