Nissan Frontier D40. Manual - part 836

ENGINE MAINTENANCE (QR25DE ENGINE)

MA-25

< ON-VEHICLE MAINTENANCE >

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.

Insert the refill hose into the coolant mixture container that is
placed at floor level. Make sure the ball valve is in the closed
position.
• Use Genuine NISSAN Long Life Anti-freeze coolant or

equivalent, mixed 50/50 with distilled water or demineral-
ized water. Refer to

MA-16, "For North America: Fluids

and Lubricants"

Install an air hose to the venturi assembly, the air pressure must
be within specification.

CAUTION:

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

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. Coolant will be visible rising in the refill hose. Once the refill hose is
full of coolant, close the ball valve. This will purge any air trapped in the refill hose.

Continue to draw the vacuum until the gauge reaches 28 inches
of vacuum. The gauge may not reach 28 inches in high altitude
locations, use the vacuum specifications below based on the
altitude above sea level.

When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds
to see if the system loses any vacuum. If the vacuum level drops, perform any necessary repairs to the
system and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for any leaks.

10. Place the coolant container (with the refill hose inserted) at the same level as the top of the radiator. Then

open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling
system is full when the vacuum gauge reads zero.

CAUTION:

Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.

11. Remove the Tool from the radiator neck opening and install the radiator cap.
12. Remove the non-vented reservoir cap.

13. 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 before installing the vented reservoir cap.

FLUSHING COOLING SYSTEM

Drain the engine coolant from the engine cooling system. Refer to

CO-12, "Changing Engine Coolant"

Tool number

: KV991J0070 (J-45695)

Engine coolant capacity
(with reservoir tank)

: Refer to

MA-16, "For

North America: Fluids and
Lubricants"

Compressed air
supply pressure

: 549 - 824 kPa (5.6 - 8.4 kg/cm

80 - 119 psi)

LLIA0058E

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

MA-26

< ON-VEHICLE MAINTENANCE >

ENGINE MAINTENANCE (QR25DE ENGINE)

Fill the radiator and the reservoir tank (to the "MAX" line) with water. Reinstall the radiator cap and leave
the vented reservoir cap off.

Run the engine until it reaches normal operating temperature.

Press the engine accelerator two or three times under no-load.

Stop the engine and wait until it cools down.

Drain the water from the engine cooling system. Refer to

CO-12, "Changing Engine Coolant"

Repeat steps 2 through 6 until clear water begins to drain from the radiator.

FUEL LINES

FUEL LINES : Checking Fuel Line

INFOID:0000000005272740

Inspect the fuel lines and fuel tank for improperly attached hoses,
leaks, cracks, damage, loose connections, chafing, or deterioration.
If necessary, repair or replace any damaged parts.

AIR CLEANER FILTER

AIR CLEANER FILTER : Removal and Installation

INFOID:0000000005272741

REMOVAL

Unfasten clips and lift up air cleaner case (upper).

Remove air cleaner filter.

INSTALLATION

Installation is in the reverse order of removal.

ENGINE OIL

ENGINE OIL : Inspection

INFOID:0000000005272742

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-16, "For North America: Fluids and Lubricants"

CAUTION:

Do not overfill the engine with oil.

SMA803A

LBIA0442E

PBIC2823E

ENGINE MAINTENANCE (QR25DE ENGINE)

MA-27

< ON-VEHICLE MAINTENANCE >

ENGINE 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.

ENGINE OIL LEAKAGE

Check for engine oil leakage around the following area.
• Oil pan
• Oil pan drain plug
• Oil pressure switch
• Oil filter
• Oil cooler
• Intake valve timing control cover and intake valve timing control solenoid valve
• Front cover
• Mating surface between cylinder block and lower cylinder block
• Mating surface between cylinder block and cylinder head
• Mating surface between cylinder head and rocker cover
• Crankshaft oil seals (front and rear)

OIL PRESSURE CHECK

WARNING:

• Be careful not to burn yourself, as the engine and engine oil may be hot.
• Put the selector lever in the Park (P) position (A/T models) or Neutral position (M/T models), and

apply parking brake securely.

Check engine oil level. Refer to

MA-26, "ENGINE OIL : Inspection"

Remove engine undercover using power tool.

Disconnect the oil pressure switch harness connector.

Remove oil pressure switch using a suitable tool. Refer to

EM-78, "Exploded View"

CAUTION:

Do not drop or shock oil pressure switch.

Install Tools.

Start the engine and warm it up to normal operating temperature.

Check the engine oil pressure with engine running under no-load. Refer to

LU-15, "Standard and Limit"

CAUTION:

• If the difference is extreme, check the oil passages and oil pump for leaks and blockages.
• It is impossible to replace or adjust oil pump because oil pump is manufactured with balancer

unit. If any malfunction is found on oil pump, replace balancer unit as an assembly.

After the inspections, install oil pressure switch as follows:

Remove old liquid gasket adhering to oil pressure switch and the engine.

Apply liquid gasket and tighten oil pressure switch to the specification.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-22, "Recommended Chemical Prod-

ucts and Sealants"

After warming up engine, make sure there is no leakage of engine oil with running engine.

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)

MA-28

< ON-VEHICLE MAINTENANCE >

ENGINE MAINTENANCE (QR25DE ENGINE)

ENGINE OIL : Changing Engine Oil

INFOID:0000000005272743

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.

Warm up the engine and check for any oil leaks

Stop the engine and wait for at least 10 minutes.

Remove the oil drain plug and oil filler cap to drain the old oil.

Install a new washer on the oil drain plug, then install the oil
drain plug in the oil pan.

CAUTION:

Be sure to clean drain plug and install with new washer.

Refill the engine with new specified engine oil.

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.

Warm up the engine and check the area around the drain plug and oil filter for any oil leaks.

Stop the engine and wait for more than 10 minutes.

Check the oil level using the dipstick as shown. Add oil as nec-
essary and install the oil filler cap. Refer to

MA-26, "ENGINE

OIL : Inspection"

CAUTION:

Do not overfill the engine with oil.

OIL FILTER

OIL FILTER : Removal and Installation

INFOID:0000000005272744

REMOVAL

Remove the engine front undercover using power tool.