Nissan Terrano r20e. Manual — part 364
System Inspection
CHECKING HOSES
Check hoses for proper attachment, leaks, cracks, damage, loose
connections, chafing and deterioration.
CHECKING RADIATOR CAP
To check radiator cap, apply pressure to the cap with a cap tester.
Radiator cap relief pressure:
78 - 98 kPa
(0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2
, 11 - 14 psi)
CHECKING COOLING SYSTEM FOR LEAKS
Appear pressure to the cooling system by means of a tester to
check for leakage.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2
, 23 psi)
CAUTION:
Higher than the specified pressure may cause radiator dam-
age.
SLC613
SMA990A
ENGINE COOLING SYSTEM
TD27Ti
LC-28
Water Pump
REMOVAL AND INSTALLATION
Drain coolant from drain plugs on cylinder block and radiator.
Cylinder block drain plug:
(Use proper sealant)
: 20 - 29 N
⋅
m (2.0 - 3.0 kg-m, 14 - 22 ft-lb)
CAUTION:
I
When removing water pump assembly, be careful not to
spill coolant on drive belt.
I
Water pump cannot be disassembled and should be
replaced as a unit.
I
Always replace with new gasket.
I
After installing water pump, connect hose and clamp
securely, then check for leaks using radiator cap tester.
NLC012
NLC058
ENGINE COOLING SYSTEM
TD27Ti
LC-29
INSPECTION
1. Check for badly rusted or corroded body assembly and vane.
2. Check the water pump bushing for excessive end play and
irregular movement.
3. Check fan coupling for rough operation, oil leakage or bent
bimetal.
The water pump and fan coupling cannot be disassembled and
should be replaced as a unit.
SLC979
SLC244
SLC245
ENGINE COOLING SYSTEM
TD27Ti
Water Pump (Cont’d)
LC-30
Thermostat
q
1
Water outlet
q
2
Thermostat with jiggle valve
q
3
Rubber seal
q
4
Water connector
q
5
Thermostat housing
q
6
Engine coolant temperature sen-
sor
q
7
Thermal transmitter
CAUTION:
I
After installation, run engine for a few minutes, and check
for leaks.
I
Be careful not to spill coolant over engine compartment.
Place a rag to absorb coolant.
INSPECTION
1. Check for valve seating condition at ordinary temperatures. It
should seat tightly.
2. Check valve opening temperature and maximum valve lift.
Standard type
Optional type
Valve opening temperature
°C (°F)
82 (180)
88 (190)
Max. valve lift
mm/°C (in/°F)
8/95
(0.315/203)
8/100
(0.315/212)
3. Then check if valve closes at 5°C (9°F) below valve opening
temperature.
NLC059
SLC343
ENGINE COOLING SYSTEM
TD27Ti
LC-31
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