Infiniti QX4 (R50). Manual — part 495
I
Inspect the oil cooler after removing it.
SLC333B
3.
Installation is in reverse order of removal.
I
When installing the oil cooler, align the oil cooler stopper
with the stopper of the oil cooler bracket.
INSPECTION
NBLC0037
Oil Cooler
NBLC0037S01
1.
Check oil cooler for cracks.
2.
Check oil cooler for clogging by blowing through coolant inlet.
If necessary, replace oil cooler assembly.
Oil Pressure Relief Valve
NBLC0037S02
Inspect oil pressure relief valve for movement, cracks and breaks
by pushing the ball. If replacement is necessary, remove valve by
prying it out with a suitable tool. Install a new valve in place by
tapping it.
Service Data and Specifications (SDS)
OIL PRESSURE
NBLC0010
Engine speed
rpm
Approximate discharge pressure
kPa (kg/cm
2
, psi)
Idle speed
2,000
More than 98 (1.0, 14)
294 (3.0, 43)
REGULATOR VALVE
NBLC0011
Unit: mm (in)
Regulator valve to oil pump cover clearance
0.040 - 0.097 (0.0016 - 0.0038)
OIL PUMP
NBLC0012
Unit: mm (in)
Body to outer rotor radial clearance
0.114 - 0.200 (0.0045 - 0.0079)
Inner rotor to outer rotor tip clearance
Below 0.18 (0.0071)
Body to inner rotor axial clearance
0.030 - 0.070 (0.0012 - 0.0028)
Body to outer rotor axial clearance
0.050 - 0.110 (0.0020 - 0.0043)
Inner rotor to brazed portion of housing clearance
0.045 - 0.091 (0.0018 - 0.0036)
ENGINE LUBRICATION SYSTEM
Oil Cooler (Cont’d)
LC-8
SEM164F
AEM080
Precautions
LIQUID GASKET APPLICATION PROCEDURE
NBLC0013
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
NBLC0014
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
WS39930000
(
—
)
Tube pressure
NT052
Pressing the tube of liquid gasket
EG17650301
(J33984-A)
Radiator cap tester
adapter
NT564
Adapting radiator cap tester to radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
KV99103510
(
—
)
Radiator plate pliers A
NT224
Installing radiator upper and lower tanks
KV99103520
(
—
)
Radiator plate pliers B
NT225
Removing radiator upper and lower tanks
GI
MA
EM
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE COOLING SYSTEM
Precautions
LC-9
Cooling Circuit
NBLC0015
SLC321B
SLC325B
ENGINE COOLING SYSTEM
Cooling Circuit
LC-10
System Check
NBLC0016
WARNING:
Never remove the radiator cap when the engine is hot; serious
burns could be caused by high pressure fluid escaping from
the radiator.
Wrap a thick cloth around the cap and carefully remove it by
turning it a quarter turn to allow built-up pressure to escape
and then turn the cap all the way off.
CHECKING COOLING SYSTEM HOSES
NBLC0016S01
Check hoses for improper attachment, leaks, cracks, damage,
loose connections, chafing and deterioration.
CHECKING RADIATOR
NBLC0016S02
Check radiator for mud or clogging. If necessary, clean radiator as
follows.
I
Be careful not to bend or damage the radiator fins.
I
When radiator is cleaned without removal, remove all sur-
rounding parts such as cooling fan, radiator shroud and horns.
Then tape the harness and connectors to prevent water from
entering.
1.
Apply water by hose to the back side of the radiator core ver-
tically downward.
2.
Apply water again to all radiator core surfaces once per
minute.
3.
Stop washing if any stains no longer flow out from the radia-
tor.
4.
Blow air into the back side of radiator core vertically downward.
I
Use compressed air lower than 490 kPa (5 kg/cm
2
, 71 psi) and
keep distance more than 30 cm (11.8 in).
5.
Blow air again into all the radiator core surfaces once per
minute until no water sprays out.
SLC755A
CHECKING RADIATOR CAP
NBLC0016S03
To check radiator cap, apply pressure to cap with a tester.
Radiator cap relief pressure:
Standard
78 - 98 kPa
(0.8 - 1.0 kg/cm
2
, 11 - 14 psi)
Limit
59 - 98 kPa
(0.6 - 1.0 kg/cm
2
, 9 - 14 psi)
SMA967B
Pull the negative pressure valve to open it.
Check that it closes completely when released.
GI
MA
EM
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE COOLING SYSTEM
System Check
LC-11
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