Infiniti QX4 (R50). Manual — part 493
NOTES
ENGINE LUBRICATION &
COOLING SYSTEMS
CONTENTS
ENGINE LUBRICATION SYSTEM. . . . . . . . ..2
Precautions . . . . . . . . . . . . . . . . ..2
LIQUID GASKET APPLICATION PROCEDURE
. . . 2
Preparation . . . . . . . . . . . . . . . . ..2
. . . . . . . . . . 2
. . . . . . . . ..3
Lubrication Circuit . . . . . . . . . . . . . . 3
Oil Pressure Check. . . . . . . . . . . . . ..4
Oil Pump . . . . . . . . . . . . . . . . . ..5
. . . . . . . . .5
. . . . . . . . . . . 6
. . . . . . . 6
. . . . . . . . . . . . . . . ...7
Oil Cooler. . . . . . . . . . . . . . . . . .7
. . . . . . . . .7
. . . . . . . . . . . . . . . .8
Service Data and Specifications (SDS). . . . . ...8
. . . . . . . . . . . . . . 8
. . . . . . . . . . . . .8
. . . . . . . . . . . . . . . . .8
ENGINE COOLING SYSTEM. . . . . . . . . . ..9
Precautions . . . . . . . . . . . . . . . . ..9
LIQUID GASKET APPLICATION PROCEDURE
. . . 9
Preparation . . . . . . . . . . . . . . . . ..9
. . . . . . . . . . 9
Cooling Circuit . . . . . . . . . . . . . . ...10
System Check. . . . . . . . . . . . . . . 11
. . . . ... 11
. . . . . . . . . . . 11
. . . . . . . . . 11
CHECKING COOLING SYSTEM FOR LEAKS
. . . 12
Water Pump . . . . . . . . . . . . . . . ...12
. . . . . . . ...12
. . . . . . . . . . . . . . . ...12
. . . . . . . . . . . . . . ...14
. . . . . . . . . . . . . . 14
Thermostat. . . . . . . . . . . . . . . . .16
. . . . . . . ...16
. . . . . . . . . . . . . . ...16
Water Control Valve. . . . . . . . . . . . ...17
. . . . . . . ...17
. . . . . . . . . . . . . . ...18
Radiator . . . . . . . . . . . . . . . . . .19
. . . . . . . ...19
Cooling Fan (Crankshaft driven) . . . . . . . ...20
. . . . . . . ...20
. . . . . . . . . . . . . . ...20
Refilling Engine Coolant . . . . . . . . . . . 20
Radiator (Aluminum type). . . . . . . . . . ..21
. . . . . . . . . . . . . ...21
. . . . . . . . . . . . . . 21
. . . . . . . . . . . . . . . .22
. . . . . . . . . . . . . . ...23
Overheating Cause Analysis . . . . . . . . . .24
Service Data and Specifications (SDS). . . . . .25
. . . . . . . . . . . . . . 25
. . . . . . . . . ...25
. . . . . . . . . . . . . . . ..25
GI
MA
EM
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
SEM164F
AEM080
Precautions
LIQUID GASKET APPLICATION PROCEDURE
NBLC0001
1.
Use a scraper to remove all traces of old liquid gasket from
mating surfaces and grooves. Also, completely clean any oil
from these areas.
2.
Apply a continuous bead of liquid gasket to mating surfaces.
(Use Genuine RTV silicone sealant Part No. 999MP-A7007
or equivalent.)
I
For oil pan, be sure liquid gasket diameter is 4.0 to 5.0 mm
(0.157 to 0.197 in).
I
For areas except oil pan, be sure liquid gasket diameter is 2.0
to 3.0 mm (0.079 to 0.118 in).
3.
Apply liquid gasket around the inner side of bolt holes (unless
otherwise specified).
4.
Assembly should be done within 5 minutes after coating.
5.
Wait at least 30 minutes before refilling engine oil and engine
coolant.
Preparation
SPECIAL SERVICE TOOLS
NBLC0002
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
NT050
ST25052000
(J25695-2)
Hose
NT559
Adapting oil pressure gauge to upper oil pan
WS39930000
(
—
)
Tube pressure
NT052
Pressing the tube of liquid gasket
ENGINE LUBRICATION SYSTEM
Precautions
LC-2
COMMERCIAL SERVICE TOOL
NBLC0040
Tool name
Description
Deep socket
NT818
Removing and installing oil pressure switch
Deep socket 26 mm, 3/8 drive
Lubrication Circuit
NBLC0003
SLC350BA
GI
MA
EM
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE LUBRICATION SYSTEM
Preparation (Cont’d)
LC-3
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