Nissan Xterra. Instruction — part 492
OIL COOLER
LU-11
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REMOVAL AND INSTALLATION
OIL COOLER
Exploded View
INFOID:0000000009484421
Removal and Installation
INFOID:0000000009484422
WARNING:
Be careful not to burn yourself, as the engine oil and engine coolant may be hot.
CAUTION:
• Do not spill engine coolant on the drive belt.
• Do not spill engine oil on rubber parts such as drive belts and engine mounting insulator.
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.
REMOVAL
1. Drain engine coolant from radiator and cylinder block. Refer to
CO-11, "Changing Engine Coolant"
EM-103, "Disassembly and Assembly"
2. Remove engine under cover. Refer to
EXT-15, "Removal and Installation"
.
3. Disconnect water hoses from oil cooler.
CAUTION:
Perform this step when engine is cold.
WBIA0572E
1.
Water connector
2.
Water hose
3.
Water pipe
4.
Oil pan (upper) front side
5.
O-ring
6.
Relief valve
7.
Oil cooler
8.
Oil filter
9.
Connector bolt
LU-12
< REMOVAL AND INSTALLATION >
[VQ40DE]
OIL COOLER
4. Remove oil filter. Refer to
LU-10, "Removal and Installation"
5. Remove connector bolt, oil cooler, and O-ring.
CAUTION:
Do not reuse O-ring.
6. Inspect the relief valve. Refer to "INSPECTION AFTER REMOVAL". If replacement of the relief valve is
necessary, remove the relief valve by prying it out using suitable tool.
INSPECTION AFTER REMOVAL
Oil Cooler
Check oil cooler for cracks. Check oil cooler for clogging by blowing compressed air through engine coolant
inlet. If necessary, replace oil cooler assembly.
Relief Valve
Check relief valve for movement, cracks and breaks by pushing the ball. If necessary, replace relief valve.
INSTALLATION
Installation is in the reverse order of removal, paying attention to the following.
• If replacement of the relief valve is necessary, install the new relief valve in place by tapping it in using suit-
able tool.
CAUTION:
Do not reuse relief valve.
• Confirm that no foreign objects are adhering to the sealing sur-
faces of the oil cooler and oil pan (upper).
• Tighten connector bolt after aligning cutout on oil cooler with pro-
trusion on oil pan (upper) side.
CAUTION:
Do not reuse O-ring.
INSPECTION AFTER INSTALLATION
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to
MA-12, "Fluids and Lubricants"
.
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to spec-
ified level, if necessary.
• Summary of the inspection items:
PBIC2825E
Item
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Transmission/
transaxle fluid
A/T and CVT Models
Leakage
Level/Leakage
Leakage
M/T Models
Level/Leakage
Leakage
Level/Leakage
Other oils and fluids*
Level
Leakage
Level
OIL COOLER
LU-13
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*Power steering fluid, brake fluid, etc.
Fuel
Leakage
Leakage
Leakage
Exhaust gas
—
Leakage
—
Item
Before starting engine
Engine running
After engine stopped
LU-14
< REMOVAL AND INSTALLATION >
[VQ40DE]
OIL PUMP
OIL PUMP
Exploded View
INFOID:0000000009484423
Removal and Installation
INFOID:0000000009484424
REMOVAL
1. Disconnect the battery negative terminal. Refer to
PG-72, "Removal and Installation"
2. Remove engine under cover (if equipped). Refer to
EXT-15, "Removal and Installation"
3. Remove the front final drive (4WD models). Refer to
DLN-165, "Removal and Installation"
.
4. Remove the nuts and bolts of the steering gear assembly, using power tool, then remove the crossmem-
ber from the vehicle and support the steering gear assembly with a suitable wire.
5. Remove the air duct and resonator assembly and the air cleaner case (upper). Refer to
6. Remove timing chain (primary) only. Refer to
EM-59, "Removal and Installation"
7. Remove the oil pump assembly.
INSTALLATION
Installation is in the reverse order of removal, paying attention to the following.
• When installing, align crankshaft flat faces with inner rotor flat faces.
INSPECTION AFTER INSTALLATION
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to
MA-12, "Fluids and Lubricants"
.
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including
engine oil and engine coolant.
1.
Oil pump body
2.
Oil pump outer rotor
3.
Oil pump inner rotor
4.
Oil pump cover
5.
Regulator valve plug
6.
Regulator valve spring
7.
Regulator valve spring
8.
Regulator valve
PBIC2826E
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