Infiniti Q45 (FY33). Manual — part 496
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ENGINE LUBRICATION &
COOLING SYSTEMS
CONTENTS
PRECAUTIONS AND PREPARATION. . . . . . . 2
Liquid Gasket Application Procedure . . . . . . ..2
Special Service Tools . . . . . . . . . . . . ..2
ENGINE LUBRICATION SYSTEM . . . . . . . . ..3
Lubrication Circuit . . . . . . . . . . . . . . 3
Oil Pressure Check. . . . . . . . . . . . . ..4
Oil Pump . . . . . . . . . . . . . . . . . ..5
ENGINE COOLING SYSTEM. . . . . . . . . . ..8
Cooling Circuit . . . . . . . . . . . . . . . .8
System Check. . . . . . . . . . . . . . . ..8
Water Pump . . . . . . . . . . . . . . . . .9
Thermostat. . . . . . . . . . . . . . . . . 11
Radiator . . . . . . . . . . . . . . . . . .13
Cooling Fan (Crankshaft driven) . . . . . . . ...17
Cooling Fan (Motor driven). . . . . . . . . . 17
Overheating Cause Analysis . . . . . . . . . .18
SERVICE DATA AND SPECIFICATIONS (SDS) . . ..19
Engine Lubrication System. . . . . . . . . . 19
Engine Cooling System . . . . . . . . . . . .19
GI
MA
EM
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
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SEM650E
Liquid Gasket Application Procedure
a.
Use a scraper to remove all traces of old liquid gasket from
mating surfaces and grooves. Also, completely clean any oil
from these areas.
b.
Apply a continuous bead of liquid gasket to mating surfaces.
(Use Genuine RTV silicone sealant part No. 999 MP-A7007 or
equivalent.)
I
Be sure liquid gasket is 2.5 to 3.5 mm (0.098 to 0.138 in)
wide (for oil pan).
I
Be sure liquid gasket is 2.0 to 3.0 mm (0.079 to 0.118 in)
wide (in areas except oil pan).
c.
Apply liquid gasket to inner side as shown at the left.
d.
Assembly should be done within 5 minutes after coating.
e.
Wait 30 minutes before refilling engine oil and coolant.
Special Service Tools
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
Description
ST25051001
(J25695-1)
Oil pressure gauge
NT558
Measuring oil pressure
Maximum measuring range:
2,452 kPa (25 kg/cm
2
, 356 psi)
ST25052000
(J25695-2)
Hose
NT559
Adapting oil pressure gauge to cylinder block
WS39930000
(
—
)
Tube presser
NT052
Pressing the tube of liquid gasket
EG17650301
(J33984-A)
Radiator cap tester
adapter
NT564
Adapting radiator cap tester to radiator filler
neck
Unit: mm (in)
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
KV99103510
(
—
)
Radiator plate pliers A
NT224
Installing radiator upper and lower tanks
KV99103520
(
—
)
Radiator plate pliers B
NT225
Removing radiator upper and lower tanks
PRECAUTIONS AND PREPARATION
LC-2
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Lubrication Circuit
SLC103B
SLC104B
GI
MA
EM
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ENGINE LUBRICATION SYSTEM
LC-3
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Oil Pressure Check
WARNING:
I
Be careful not to burn yourself, as the engine and oil may
hot.
I
Oil pressure check should be done in “Parking position”.
SLC105B
1.
Check oil level.
2.
Remove oil pressure switch.
SLC926
3.
Install pressure gauge.
4.
Start engine and warm it up to normal operating temperature.
5.
Check oil pressure with engine running under no-load.
Engine speed
rpm
Approximate discharge
pressure kPa (kg/cm
2
, psi)
Idle speed
More than 98 (1.0, 14)
3,000
461 - 559 (4.7 - 5.7, 67 - 81)
If difference is extreme, check oil passage and oil pump for oil
leaks.
6.
Install oil pressure switch with sealant.
ENGINE LUBRICATION SYSTEM
LC-4
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