Nissan Xterra. Manual - 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"

 and

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 >

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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

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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 >

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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 

EM-24, "Removal

and Installation"

.

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