Content .. 923 924 925 926 ..

Nissan Altima L32. Instruction - part 925

MA-14

< ON-VEHICLE MAINTENANCE >

ENGINE MAINTENANCE (QR25DE)

ENGINE MAINTENANCE (QR25DE)

DRIVE BELTS
DRIVE BELTS : Checking Drive Belts

INFOID:0000000004202046

WARNING:

Inspect the drive belt only when the engine is stopped.

NOTE:

On vehicles not equipped with A/C, there is an idler pulley in the position for the drive belt routing.

• Make sure that the stamp mark of drive belt auto-tensioner is within the usable range.

NOTE:

• Check the drive belt auto-tensioner indicator (notch) when the engine is cold.

• When the new drive belt is installed, the range should be “A” as shown.

• Visually check entire belt for wear, damage or cracks.

• If the indicator is out of allowable use range or belt is damaged, replace the belt.

DRIVE BELTS : Tension Adjustment

INFOID:0000000004202047

• Belt tension is not instructionly adjustable, it is automatically adjusted by the drive belt auto-tensioner.

ENGINE COOLANT
ENGINE COOLANT : Changing Engine Coolant

INFOID:0000000004202048

WARNING:

• To avoid being scalded, never change the coolant when the engine is hot.

• Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn to

release built-up pressure. Then push down and turn the cap all the way to remove.

DRAINING ENGINE COOLANT

1. Remove the engine undercover using power tool.
2. Open the radiator drain plug at the bottom of the radiator, and remove the radiator filler cap. This is the

only step required when partially draining the cooling system (radiator only).

CAUTION:

Do not to allow the coolant to contact the drive belts.

3. Follow this step for heater core removal/replacement only. Disconnect the upper heater hose at the

engine side and apply moderate air pressure [103.46 kPa (15 psi, 1.055 kg/cm

) maximum air pressure]

into the hose for 30 seconds to blow the excess coolant out of the heater core.

4. When draining all of the coolant in the system, remove the reservoir tank and drain the coolant, then clean

the reservoir tank before installation.

SBIA0234E

ENGINE MAINTENANCE (QR25DE)

MA-15

< ON-VEHICLE MAINTENANCE >

5. When draining all of the coolant in the system for engine

removal or repair, open the drain plug on the cylinder block.

6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.

If the coolant is contaminated, flush the engine cooling system. Refer to "FLUSHING COOLING SYS-

TEM" .

REFILLING ENGINE COOLANT

1. Install the radiator drain plug. Install the reservoir tank and cylinder block drain plug, if removed for a total

system drain or for engine removal or repair.

• The radiator must be completely empty of coolant and water.

• Apply sealant to the threads of the cylinder block drain plugs. Use Genuine High Performance

Thread Sealant or equivalent. Refer to

2. If disconnected, reattach the upper radiator hose at the engine side.
3. 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.

4. 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.

5. 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-12, "Engine Oil Recommendation"

6. 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.

7. 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.

KBIA0163E

Radiator drain plug

: Refer to

CO-15, "Removal and Installation"

Cylinder block drain plug

: Refer to

EM-76, "Disassembly and Assembly"

Tool number

: KV991J0070 (J-45695)

Engine coolant capacity
(with reservoir tank)

: Refer to

MA-12, "Fluids

and Lubricants"

Compressed air
supply pressure

: 5.7 - 8.5 kPa (5.6 - 8.4 kg/cm

80 - 120 psi)

LLIA0058E

MA-16

< ON-VEHICLE MAINTENANCE >

ENGINE MAINTENANCE (QR25DE)

8. 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 vacuum specifications based on the alti-

tude above sea level.

9. 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.
12. Fill the cooling system reservoir tank to the specified level and install the radiator cap. 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 cap above the radiator upper hose and reservoir tank, with water and rein-

stall the filler cap above the radiator upper hose.

2. Run the engine until it reaches normal operating temperature.
3. Press the engine accelerator two or three times under no-load.
4. Stop the engine and wait until it cools down.
5. Drain the water.
6. Repeat steps 1 through 5 until clear water begins to drain from the radiator.

FUEL LINES
FUEL LINES : Inspection

INFOID:0000000004202049

Inspect fuel lines, fuel filler cap and fuel tank for improper attach-

ment, leaks, cracks, damage, loose connections, chafing or deterio-

ration.

If necessary, repair or replace damaged parts.

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 (QR25DE)

MA-17

< ON-VEHICLE MAINTENANCE >

AIR CLEANER FILTER : Removal and Installation

INFOID:0000000004523224

CHANGING THE AIR CLEANER FILTER

CAUTION:

It is not necessary to remove the front air duct to replace the air cleaner element.
1. Unhook the air cleaner case side clips.
2. Remove the air cleaner filter.
3. Install a new air cleaner filter.
4. Lock the air cleaner case side clips.

ENGINE OIL
ENGINE OIL : Changing Engine Oil

INFOID:0000000004523225

WARNING:

• Be careful not to burn yourself, as the 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. Position the vehicle so it is level on the hoist.
2. Warm up the engine and check for oil leaks from the engine.
3. Stop engine and wait for 10 minutes.
4. Remove the oil pan drain plug and oil filler cap.
5. Drain the engine oil.
6. Install the oil pan drain plug with a new washer and refill the engine with new engine oil.

AWBIA0567ZZ

Air duct hose

2. Air cleaner filter

Air cleaner case (front)

Front air duct

Air cleaner mounting bracket

Air cleaner case (rear)

Mass air flow sensor

A. To electric throttle control actuator

B. Air cleaner case side clips

Oil specification and viscosity

: Refer to

MA-12, "Engine Oil Recommendation"

Oil pan drain plug

: Refer to

EM-32, "Removal and Installation"

Content .. 923 924 925 926 ..