Nissan Xterra. Manual - part 491

ENGINE OIL

LU-7

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PERIODIC MAINTENANCE

ENGINE OIL

Inspection

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OIL LEVEL

• Before starting the engine make sure the vehicle is parked on a flat

and level surface, then check the oil level. If the engine is already

running, turn it off and allow 10 minutes before checking.

• Pull out oil level gauge and wipe clean.

• Insert oil level gauge.

• Check that the oil level is within the low (L) and high (H) range as

indicated on the dipstick.

• If the engine oil level is out of range, add oil as necessary. Refer to

MA-12, "Fluids and Lubricants"

.

CAUTION:

Do not overfill the engine with oil.

OIL APPEARANCE

• Check the engine oil for a white milky appearance or excessive contamination.

• If the engine oil is milky, it is highly probable that it is contaminated with engine coolant. Repair or replace

damaged parts.

OIL LEAKAGE

Check for oil leakage around the following areas:

• Oil pans (lower and upper)

• Oil pan drain plug

• Oil pressure switch

• Oil filter

• Oil cooler

• Intake valve timing control cover

• Intake valve timing control solenoid valve

• Water pump cover

• Chain tensioner cover

• Intake valve timing control cover and intake valve timing control solenoid valve

• Mating surface between cylinder block and cylinder head

• Mating surface between lower cylinder block and cylinder block

• Mating surface between cylinder head and rocker cover

• Mating surface between front timing chain case and rear timing chain case

• Mating surface between rear timing chain case and cylinder head

• Mating surface between rear timing chain case and cylinder block

• Mating surface between rear timing chain case and lower cylinder block

• Mating surface between rear timing chain case and oil pan (upper)

• Crankshaft oil seals (front and rear)

• Oil level gauge guide

• Camshaft position sensor (PHASE)

OIL PRESSURE CHECK

WARNING:

• Be careful not to burn yourself, as the engine and engine oil may be hot.

• Put the shift selector in the Park (P) position (A/T models) or Neutral position (M/T models), and

apply parking brake securely.

1. Check engine oil level. Refer to 

LU-7, "Inspection"

.

2. Remove engine under cover. Refer to 

EXT-15, "Removal and Installation"

.

PBIC2823E

LU-8

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ENGINE OIL

3. Disconnect the oil pressure switch (B) harness connector.

• A: Oil pan (upper)
•

: Front

4. Remove the oil pressure switch (B) using suitable tool.

CAUTION:

Do not drop or shock oil pressure switch.

5. Install Tools.

6. Start the engine and warm it up to normal operating temperature.
7. Check the engine oil pressure with engine running under no-load. Refer to 

LU-18, "Standard and Limit"

.

CAUTION:

If the difference between the test results and the specification is extreme, check the oil passages

and oil pump for leaks and blockages.

8. After the inspections, install oil pressure switch as follows:
a. Remove old liquid gasket adhering to oil pressure switch and engine.
b. Apply liquid gasket and tighten oil pressure switch to the specification.

Use Genuine RTV Silicone Sealant or equivalent. Refer to 

GI-21, "Recommended Chemical Prod-

ucts and Sealants"

.

c.

After warming up engine, ensure there are no engine oil leaks. 

9. Install the engine under cover. Refer to 

EXT-15, "Removal and Installation"

.

Changing Engine Oil

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WARNING:

• Be careful not to burn yourself, as the engine and engine oil may be hot.

• Prolonged and repeated contact with used engine oil may cause skin cancer; try to avoid direct skin

contact with used oil. If skin contact is made, wash thoroughly with soap or hand cleaner as soon as

possible.

1. Warm up the engine, and check for oil leaks.
2. Stop the engine and wait for at least 10 minutes.
3. Remove the oil drain plug and oil filler cap to drain the old oil.
4. Install a new copper sealing washer on the oil drain plug, then install the oil drain plug in the oil pan.

CAUTION:

• Clean the drain plug.

• Do not reuse copper sealing washer.

5. Refill the engine with new specified engine oil.

WBIA0813E

Tool numbers : ST25051001 (J-25695-1)

: ST25052000 (J-25695-2)

WBIA0571E

Oil pressure switch torque

: 14.7 N·m (1.5 kg-m, 11 ft-lb)

Oil drain plug

: Refer to 

EM-34, "Removal and Installation"

.

ENGINE OIL

LU-9

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CAUTION:

The refill capacity depends on the oil temperature and drain time. Use the “Refill oil capacity” val-

ues as a reference and check the oil level using the dipstick when filling the engine with oil.

6. Warm up the engine and check the area around the drain plug and oil filter for oil leaks. Repair as neces-

sary.

7. Stop the engine and wait for more than 10 minutes.
8. Check the oil level using the dipstick as shown. Add oil as nec-

essary and install the oil filler cap. Refer to 

LU-7, "Inspection"

.

CAUTION:

Do not overfill the engine with oil.

Oil grade and viscosity

: Refer to 

MA-12, "Fluids and Lubricants"

.

Oil capacity

: Refer to 

MA-12, "Fluids and Lubricants"

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PBIC2823E

LU-10

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OIL FILTER

OIL FILTER

Removal and Installation

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REMOVAL

1. Remove the engine under cover access door. Refer to 

EXT-15, "Removal and Installation"

.

2. Drain engine oil. Refer to 

LU-8, "Changing Engine Oil"

.

3. Remove the oil filter using Tool as shown.

WARNING:

Be careful not to burn yourself, as the engine and engine oil

may be hot.

CAUTION:

• Oil filter is equipped with a pressure relief valve. 

• Use Genuine NISSAN Oil Filter or equivalent.

• When removing, position a shop cloth to absorb any

engine oil leaks or spills.

• Do not allow engine oil to adhere to drive belts.

• Completely wipe off any engine oil that adheres to the engine and the vehicle.

INSTALLATION

1. Remove foreign materials adhering to the oil filter seal mating surface.
2. Apply clean engine oil to the new oil filter seal as shown.

3. Screw on the oil filter manually until it touches the installation

surface, then tighten it by 2/3 turn as shown. Or tighten to speci-

fication.

4. Refill engine with new engine oil. Refer to 

LU-8, "Changing Engine Oil"

.

5. Inspect the engine for oil leaks. Repair as necessary.
6. Install the engine under cover access door. Refer to 

EXT-15, "Removal and Installation"

.

INSPECTION AFTER INSTALLATION

1. Check the engine oil level. Refer to 

LU-7, "Inspection"

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2. Start the engine and check for engine oil leaks. Repair as necessary.
3. Stop the engine and wait for 10 minutes.
4. Check the engine oil level and add engine oil as required.

Tool number

: KV10115801 (J-38956)

LBIA0425E

SMA010

Oil filter

: 17.7 N·m (1.8 kg-m, 13 ft-lb)

SMA702C