Infiniti Q45 (FY33). Manual — part 498
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SLC107B
SLC755A
CHECKING COOLING SYSTEM HOSES
Check hoses for improper attachment, leaks, cracks, damage,
loose connections, chafing and deterioration.
CHECKING COOLING SYSTEM FOR LEAKS
To check for leakage, apply pressure to the cooling system with a
tester.
Testing pressure:
157 kPa (1.6 kg/cm
2
, 23 psi)
CAUTION:
Higher than the specified pressure may damage radiator.
CHECKING RADIATOR CAP
To check radiator cap, apply pressure to cap with a tester.
Radiator cap relief pressure:
Standard
98 - 118 kPa (1.0 - 1.2 kg/cm
2
, 14 - 17 psi)
Limit
59 - 118 kPa (0.6 - 1.2 kg/cm
2
, 9 - 17 psi)
SLC108B
Water Pump
REMOVAL
1.
Drain coolant from drain cocks on both sides of cylinder block
and radiator.
SLC109B
2.
Loosen drive belts.
3.
Remove fan coupling with fan.
4.
Remove idler pulley bracket and drive belt.
5.
Remove water pump.
GI
MA
EM
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ENGINE COOLING SYSTEM
System Check (Cont’d)
LC-9
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SLC110B
CAUTION:
I
When removing water pump assembly, be careful not to
get coolant on drive belt.
I
Water pump cannot be disassembled and should be
replaced as a unit.
I
After installing water pump, connect hose and clamp
securely, then check for leaks using radiator cap tester.
SLC360A
INSPECTION
1.
Check for badly rusted or corroded vanes and body assembly.
2.
Check for rough operation due to excessive end play.
SLC362A
INSTALLATION
1.
Use a scraper to remove old liquid gasket from water pump.
I
Also remove traces of liquid gasket from mating surface
of cylinder block.
2.
Apply a continuous bead of liquid gasket to mating surface of
water pump.
I
Use Genuine RTV silicone sealant part No. 999 MP-A7007
or equivalent.
ENGINE COOLING SYSTEM
Water Pump (Cont’d)
LC-10
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Thermostat
SLC111B
REMOVAL AND INSTALLATION
Removal
1.
Drain coolant from drain cocks on both sides of cylinder block
and radiator.
2.
Remove front ornament cover.
3.
Remove water inlet and thermostat.
GI
MA
EM
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ENGINE COOLING SYSTEM
LC-11
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SLC365A
Installation
I
Use a scraper to remove old liquid gasket from water inlet.
I
Similarly, remove liquid gasket from mating surface.
I
Clean all traces of liquid gasket using white gasoline.
SLC822
I
Cut off tip of nozzle of liquid gasket tube at point shown in fig-
ure.
I
Use Genuine RTV silicone sealant part No. 999 MP-A7007 or
equivalent.
SLC364A
I
Install thermostat with jiggle valve facing upward.
I
After installation, run engine for a few minutes, and check
for leaks.
I
Be careful not to spill coolant over engine compartment.
Use a rag to absorb coolant.
SLC343
INSPECTION
1.
Check for valve seating condition at ordinary temperatures. It
should seat tightly.
2.
Check valve opening temperature and maximum valve lift.
Valve opening temperature
°C (°F)
82 (180)
Valve lift
mm/°C (in/°F)
More than 10/95 (0.39/203)
3.
Then check if valve closes at 5°C (9°F) below valve opening
temperature.
ENGINE COOLING SYSTEM
Thermostat (Cont’d)
LC-12
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