Content .. 175 176 177 178 ..

Nissan Altima HL32 Hybrid. Manual - part 177

ENGINE COOLANT

CO-11

< ON-VEHICLE MAINTENANCE >

[QR25DE]

2. Pull the negative-pressure valve to open it and check that it

moves smoothly when released.

• Check that there is no dirt or damage on the valve seat of the

radiator cap negative-pressure valve.

• Check that there are no abnormalities in the opening and clos-

ing conditions of the negative-pressure valve.

3. Check radiator cap relief pressure using suitable tool and Tool.

• When connecting the radiator cap to the tester, apply water or

coolant to the cap seal surface.

• Replace the radiator cap if there is an abnormality in the nega-

tive-pressure valve, or if the open-valve pressure is outside of

the standard values.

CHECKING RADIATOR

Check radiator for mud or clogging. If necessary, clean radiator as follows.

• Be careful not to bend or damage the radiator fins.

• When radiator is cleaned without removal, remove all surrounding parts such as cooling fan shroud and

horns. Then tape the harness and electrical connectors to prevent water from entering.

1. Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward.
2. Apply water again to all radiator core surfaces once per minute.
3. Stop washing if any stains no longer flow out from the radiator.
4. Blow air into the back side of radiator core, with the air hose pointed vertically downward.

• Use compressed air lower than 490 kPa (5 kg/cm

, 71 psi) and keep distance more than 30 cm (11.8 in).

5. Blow air again into all the radiator core surfaces once per minute until no water sprays out.
6. Check for leaks.

Changing Engine Coolant

INFOID:0000000004211290

WARNING:

• To avoid being scalded, never change the coolant when the engine and inverter are 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.

SMA967B

Tool number

: EG17650301 (J-33984-A)

Standard: 122 - 152 kPa (1.2 - 1.5 kg/cm

, 18 - 22 psi)

Limit: 107 kPa (1.1 kg/cm

, 16 psi)

WBIA0570E

CO-12

< ON-VEHICLE MAINTENANCE >

[QR25DE]

ENGINE COOLANT

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.

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. Push the ignition switch twice to

the ON position with the Hybrid system and engine OFF as necessary to activate the heater mode.

4. Install the Tool by installing the radiator cap adapter (E) onto the

radiator tee opening (F). Then attach the gauge body assembly

(B) with the refill hose (D) and the venturi assembly (A) to the

radiator cap adapter.

• A: Venturi assembly

• B: Gauge body assembly

• C: Ball valve

• D: Refill hose

• E: Radiator cap adapter

• F: Radiator tee

5. Insert the refill hose (D) into the coolant mixture container that is

placed at floor level. Make sure the ball valve (C) 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-10, "Engine Oil Recommendation"

6. Install an air hose to the venturi assembly (A), the air pressure

must be within specification.

CAUTION:

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

KBIA0163E

Radiator drain plug

: Refer to

CO-14, "Removal and Installation"

Cylinder block drain plug

: Refer to

EM-75, "Disassembly and Assembly"

Tool number

: KV991J0070 (J-45695)

Engine coolant capacity
(with reservoir tank)

: Refer to

MA-10, "Fluids

and Lubricants"

Compressed air
supply pressure

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

, 80 - 120 psi)

AWBIA0074GB

ENGINE COOLANT

CO-13

< ON-VEHICLE MAINTENANCE >

[QR25DE]

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

the ball valve (C) on the refill hose (D) slightly. Coolant will be visible rising in the refill hose (D). Once the

refill hose (D) is full of coolant, close the ball valve (C). This will purge any air trapped in the refill hose.

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, use the vacuum specifications below based on the

altitude 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 (D) inserted] at the same level as the top of the radiator.

Then open the ball valve (C) on the refill hose (D) 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. Turn the Hybrid

system ON to 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. Turn the Hybrid system ON to the engine until it reaches normal operating temperature.
3. Press the engine accelerator two or three times under no-load.
4. Turn the Hybrid system off 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.

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

CO-14

< ON-VEHICLE REPAIR >

[QR25DE]

RADIATOR

ON-VEHICLE REPAIR

RADIATOR

Removal and Installation

INFOID:0000000004211291

WARNING:

Never remove the radiator cap when the engine and inverter are hot. Serious burns could occur from

high pressure coolant escaping from the radiator, condenser and liquid tank assembly. Wrap a thick

cloth around the cap. Slowly turn it a quarter turn to allow built-up pressure to escape. Carefully

remove the cap by turning it all the way.

REMOVAL

1. Remove engine under cover.
2. Drain engine coolant from radiator, condenser and liquid tank assembly. Refer to

CO-11, "Changing

Engine Coolant"

3. Remove air cleaner duct (front). Refer to

EM-24, "Removal and Installation"

4. Remove radiator, condenser and liquid tank assembly upper hose and lower hose.
5. Remove coolant reservoir hose.
6. Drain inverter coolant from sub-radiator. Refer to

HBC-636, "Replacement"

7. Remove front bumper reinforcement. Refer to

EXT-12, "Removal and Installation"

8. Remove sub radiator. Refer to

HBC-646, "Removal and Installation"

9. Discharge A/C system. Refer to

HA-28, "HFC-134a (R-134a) Service Procedure"

10. Remove high side junction pipe assembly. Refer to

HA-36, "Removal and Installation for Junction Pipe"

Radiator, condenser and liquid tank
assembly

Radiator hose (upper)

Radiator hose (lower)