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Nissan Pathfinder. Manual - part 846

ENGINE MAINTENANCE (VQ35DE)

MA-23

< PERIODIC MAINTENANCE >

3. Install the cylinder block drain plugs (if removed).

• Apply sealant to the thread of the water drain plug (B), and

connector bolt (C), (if removed).

CAUTION:

Do not reuse copper sealing washers.

NOTE:

• For Canada, water drain plug (B) is a block heater, not a

water drain plug.

• Install copper sealing washers (A) and (E), (if removed).

• Use Genuine High Performance Thread Sealant or equiva-

lent. Refer to

Sealants"

• Tighten each plug and connector bolt to specifications.

4. If disconnected, reattach the upper radiator hose at the engine side.
5. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with

the engine OFF as necessary to activate the heater mode.

6. Install the Tool by installing the radiator cap adapter onto the

radiator neck opening. Then attach the gauge body assembly

with the refill tube and the Venturi assembly to the radiator cap

adapter.

7. Insert the refill hose into the engine coolant mixture container

that is placed at floor level. Make sure the ball valve is in the

closed position.

CAUTION:

Do not use any cooling system additives such as radiator

sealer. Additives may clog the cooling system and cause

damage to the engine, transmission and/or cooling system.

NOTE:

Use the specified engine coolant or equivalent. Refer to

MA-15, "FOR USA AND CANADA : Fluids and Lubricants"

(United States and Canada) or

MA-16, "FOR MEXICO : Flu-

ids and Lubricants"

(Mexico).

8. Install an air hose to the Venturi assembly. The air pressure must be within specification.

: Engine front

Water drain plug (B) (ex-
cept Canada)

: 62.0 N·m (6.3 kg-m, 46 ft-lb)

Block heater (B) (Canada) : 39.0 N·m (4.0 kg-m, 29 ft-lb)
Connector Bolt (C)

: 27.0 N·m (2.8 kg-m, 20 ft-lb)

Water drain plug (D)

: 78.0 N·m (8.0 kg-m, 58 ft-lb)

AWBIA1194GB

Tool number

: KV991J0070 (J-45695)

Engine coolant capacity
(with reservoir tank)

: Refer to

MA-15, "FOR

USA AND CANADA : Flu-
ids and Lubricants"

(Unit-

ed States and Canada) or

MA-16, "FOR MEXICO :
Fluids and Lubricants"

(Mexico).

LLIA0058E

Compressed air supply pressure : 549 - 824 kPa (5.6 - 8.4 kg/cm

, 80 - 119 psi)

MA-24

< PERIODIC MAINTENANCE >

ENGINE MAINTENANCE (VQ35DE)

CAUTION:

The compressed air supply must be equipped with an air dryer.

9. The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open

the ball valve on the refill hose slightly. Rising engine coolant will be visible in the refill hose. After the refill

hose is full of engine coolant, close the ball valve. This will purge air trapped in the refill hose.

10. Continue to draw the vacuum until the gauge reaches 28 inches

of vacuum. The gauge may not reach 28 inches in high altitude

locations. Refer to the following table for expected vacuum read-

ings.

11. When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds

to see if the system loses vacuum. If the vacuum level drops, perform necessary repairs to the system

and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for leaks.

12. Place the engine coolant container (with the refill hose inserted) at the same level as the top of the radia-

tor. Then open the ball valve on the refill hose so the engine coolant will be drawn up to fill the cooling sys-

tem. The cooling system is full when the vacuum gauge reads zero.

CAUTION:

Do not allow the engine coolant container to get too low when filling to prevent air from being

inadvertently drawn into the cooling system.

13. Remove the Tool from the radiator neck opening and install the radiator cap.
14. Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system

and top up the system as necessary.

FLUSHING COOLING SYSTEM

1. Fill the radiator from the filler neck above the radiator upper hose and reservoir tank with clean water and

reinstall radiator filler cap.

2. Run the engine until it is at normal operating temperature.
3. Rev the engine two or three times under no-load.
4. Stop the engine and wait until it cools down.
5. Drain the water from the system. Refer to

MA-21, "ENGINE COOLANT : Changing Engine Coolant"

6. Repeat steps 1 through 5 until clear water begins to drain from the radiator.

FUEL LINES
FUEL LINES : Inspection

INFOID:0000000009761154

Inspect fuel lines, filler cap and tank for improper attachment, leaks,

cracks, damage, loose connections, chafing or deterioration. Repair

or replace damaged parts as necessary.

AIR CLEANER FILTER

Altitude above sea level

Vacuum gauge reading

0 - 100 m (328 ft)

: 28 inches of vacuum

300 m (984 ft)

: 27 inches of vacuum

500 m (1,641 ft)

: 26 inches of vacuum

1,000 m (3,281 ft)

: 24 - 25 inches of vacuum

LLIA0057E

SMA803A

ENGINE MAINTENANCE (VQ35DE)

MA-25

< PERIODIC MAINTENANCE >

AIR CLEANER FILTER : Exploded View

INFOID:0000000009761155

AIR CLEANER FILTER : Removal and Installation

INFOID:0000000009761156

REMOVAL

CAUTION:

It is not necessary to remove the front air duct to replace the air cleaner filter.

NOTE:

Replace the air cleaner filter per the periodic maintenance schedule or as necessary. Refer to

MA-9, "FOR

USA AND CANADA : Introduction of Periodic Maintenance"

(United States and Canada) or

MA-12, "FOR

MEXICO : Periodic Maintenance"

(Mexico).

1. Unhook air cleaner case side clips and lift air cleaner case (upper).
2. Remove the air cleaner filter.

INSTALLATION

Installation is in the reverse order of removal.

ENGINE OIL
ENGINE OIL : Inspection

INFOID:0000000009761157

ENGINE OIL LEVEL

NOTE:

Air duct hose and resonator assembly 2. Front air duct

Grommet

Air cleaner case (lower)

Grommets

Air cleaner case mounting bracket

Bracket

Air cleaner filter

Air cleaner case (upper)

10. Mass air flow sensor

A. Air cleaner case side

clips

To electric throttle control actuator

AWBIA1624ZZ

MA-26

< PERIODIC MAINTENANCE >

ENGINE MAINTENANCE (VQ35DE)

• Before starting the engine, check the engine oil level. If the engine

is already started, stop it and allow 10 minutes before checking.

• Check that the engine oil level is within the range as indicated on

the dipstick.

• If engine oil level is out of range, add oil as necessary until the dip-

stick indicates the correct level.

ENGINE OIL APPEARANCE

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

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

replace damaged parts.

ENGINE OIL LEAKS

Check for engine oil leaks around the following areas:

• Oil pan

• Oil pan drain plug

• Oil pressure switch

• Oil filter

• Oil cooler

• Intake valve timing control cover

• Front timing chain cover

• Mating surface between cylinder block and cylinder head

• Mating surface between cylinder head and rocker cover

• Crank oil seal (front and rear)

ENGINE OIL PRESSURE CHECK

WARNING:

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

• Put the CVT shift selector in the Park “P” position.
1. Check the engine oil level. Refer to OIL LEVEL.
2. Remove engine under cover. Refer to

EXT-16, "Exploded View"

3. Disconnect engine oil pressure switch harness connector at the

oil pressure switch. Remove oil pressure switch using suitable

tool and install Tools.

CAUTION:

Do not drop or shock oil pressure switch.

4. Start the engine and warm it up to normal operating temperature.
5. Check engine oil pressure with engine running under no-load, using Tool.

If difference is extreme, check oil passage and oil pump for oil leaks.

6. After the inspections, install the oil pressure switch using suitable tool as follows:
a. Remove the old sealant adhering to oil pressure switch and engine.
b. Apply thread sealant and tighten the oil pressure switch to specification.

Use Genuine High Performance Thread Sealant, or equivalent. Refer to

GI-22, "Recommended

Chemical Products and Sealants"

After warming up engine, make sure there are no engine oil leaks.

JMA122D

Tool numbers

: ST25051001 (J-25695-1)
: ST25052000 (J-25695-2)

WBIA0571E

Oil pressure switch :

EM-36, "Exploded View"

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