Nissan Terrano model r20 series 2004. Instruction — part 62
Oil Pressure Check
WARNING:
I
Be careful not to burn yourself, as the engine and oil may
be hot.
I
Oil pressure check should be done in “Neutral” gear posi-
tion.
1. Check oil level.
2. Remove oil pressure switch.
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 (bar, kg/cm
2
, psi)
Idle speed
2,000
4,000
More than 147 (1.47, 1.5, 21)
More than 539 (5.39, 5.5, 78)
More than 736 (7.36, 7.5, 107)
If difference is extreme, check oil passage and oil pump.
6. Install oil pressure switch with sealant.
Oil pressure switch:
: 13 - 17 N
⋅
m (1.25 - 1.75 kg-m, 9 - 12 ft-lb)
SLC694A
JLC362B
ENGINE LUBRICATION SYSTEM
ZD
LC-4
Oil Pump
REMOVAL AND INSTALLATION
Refer to “TIMING GEAR” in EM section.
DISASSEMBLY AND ASSEMBLY
I
When installing oil pump, apply new engine oil to gears.
I
When installing the inner and outer gear, face mating mark
toward the oil pump cover as shown (left).
JLC363B
JLC364B
ENGINE LUBRICATION SYSTEM
ZD
LC-5
OIL PUMP INSPECTION
Using a feeler gauge, straightedge and micrometers, check the
following clearances:
Unit: mm (in)
Body to outer gear radial clearance
q
1
0.114 - 0.200
(0.0045 - 0.0079)
Inner gear to outer gear tip clearance
q
2
Less than 0.180 (0.0071)
Body to inner gear axial clearance
q
3
0.05 - 0.09
(0.0020 - 0.0035)
Body to outer gear axial clearance
q
4
0.050 - 0.105
(0.0020 - 0.0041)
Inner gear to brazed portion of housing
clearance
q
5
0.045 - 0.091
(0.0018 - 0.0036)
Regulator valve to oil pump cover
clearance
q
6
0.040 - 0.097
(0.0016 - 0.0038)
I
If the tip clearance (
q
2
) exceeds the limit, replace gear set.
I
If body to gear clearances (
q
1
,
q
3
,
q
4
,
q
5
) exceed the limit,
replace oil pump body assembly.
REGULATOR VALVE INSPECTION
1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve
spring.
3. Coat regulator valve with engine oil. Check that it falls smoothly
into the valve hole by its own weight.
If damaged, replace regulator valve set or oil pump cover.
4. Check regulator valve to oil pump cover clearance.
Clearance:
q
6
: 0.040 - 0.097 mm (0.0016 - 0.0038 in)
If it exceeds the limit, replace oil pump cover.
JLC365B
JLC366B
JLC367B
SLC369B
ENGINE LUBRICATION SYSTEM
ZD
Oil Pump (Cont’d)
LC-6
OIL PRESSURE RELIEF VALVE AND BYPASS VALVE
INSPECTION (For oil cooler)
1. 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 suitable tool.
Install a new valve in place by tapping it.
2. Check oil pressure relief valve to oil cooler housing clearance.
Clearance:
q
C
: 0.032 - 0.068 mm (0.0013 - 0.0027 in)
If it exceeds the limit, replace oil cooler housing.
Oil Jet
INSPECTION (For timing chain)
Make sure that the holes are not clogged. Clean them with a wire
if necessary.
Drive oil jet into place after positioning alignment mark on.
INSPECTION (For piston)
1. Push cut-off valve of oil jet bolt with a clean resin or brass rod
and make sure that cut-off valve moves smoothly with proper
repulsion.
2. Make sure that the oil jet passage is not clogged. Clean with a
wire if necessary.
When installing oil jet, align oil jet’s boss with hole on cylin-
der block.
Oil jet:
: 30 - 39 N
⋅
m (3.0 - 4.0 kg-m, 22 - 28 ft-lb)
SLC371B
SLC385B
FEM124
FEM125
ENGINE LUBRICATION SYSTEM
ZD
Oil Pump (Cont’d)
LC-7
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