low oil pressure NISSAN PATROL 1998 Y61 / 5.G Engine Lubrication And Cooling System Workshop Manual

Special Service Tools*: Special tool or commercial equivalent
Tool number
Tool nameDescription
ST25051001*
Oil pressure gauge
NT558
Measuring oil pressure
Maximum measuring range:
2,452 kPa (24.5 bar, 25
kg/cm
2, 356 psi)
ST25052000*
Hose
NT559
Adapting oil pressure gauge
to cylinder block
EG17650301
Radiator cap tester
adapter
NT564
Adapting radiator cap tester
to radiator ®ller 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
WS39930000
Tube presser
NT052
Pressing the tube of liquid gas-
ket
PRECAUTIONS AND PREPARATION
LC-2

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
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed
3,000More than 78 (0.78, 0.8, 11)
318.7 - 424.6
(3.19 - 4.25, 3.25 - 4.33, 46.2 - 61.6)
If difference is extreme, check oil passage and oil pump for oil
leaks.
6. Install oil pressure switch with sealant.
Use proper liquid sealant.
Oil pressure switch:
:10-16Nzm (1.0 - 1.6 kg-m, 87 - 139 in-lb)
Oil Pump
REMOVAL AND INSTALLATION
1. Disconnect battery terminal.
2. Drain engine oil.
3. Drain coolant from radiator and cylinder block. Refer to MA
section (``Changing Engine Coolant'', ``ENGINE MAINTE-
NANCE'').
4. Remove radiator shroud.
5. Remove drive belts. Refer to MA section (``Checking Drive
Belts'').
6. Remove crankshaft pulley and front upper and lower belt cov-
ers. Refer to EM section (``TIMING BELT'').
7. Remove oil pan. Refer to EM section (``OIL PAN'').
8. Remove oil strainer.
9. Remove oil pump assembly.
10. Installation is in reverse order of removal.
+Before installing oil pump, remove liquid gasket from mating
surface of oil pump using a scraper.
Be sure liquid gasket in grooves is also removed.
+Remove liquid gasket from mating surface of cylinder block.
+Clean all traces of liquid gasket using white gasoline.
SLC993
ENGINE LUBRICATION SYSTEM
Oil Pressure Check (Cont'd)
LC-4