Engine coolant (Nissan X-Trail T31)

Checking the level

• Make sure the coolant level in the reservoir is between the "MIN" and "MAX" marks when the engine is cold.

• If necessary, top up the coolant level to normal.

Checking for leaks

• To check for leaks, pressurize the cooling system using a pump (suitable special tool) (A) and adapter (suitable special tool) (IN).

Test pressure. See below. "Technical data and specifications".

Attention:

• Do not remove the radiator cap when the engine is hot. High-pressure coolant squirting out of the radiator can cause serious burns.
• Pressures higher than specified may cause damage to the radiator.

Note: If the engine coolant level is low, add coolant to the radiator.

• If any deviations from the norm are detected, correct them or replace damaged components.

Drain

Attention:

• Do not remove the radiator cap when the engine is hot. High-pressure coolant squirting out of the radiator can cause serious burns.
• Wrap the cap with a thick cloth. First unscrew the cap a quarter turn and release the pressure. Then unscrew the cap the rest of the way.

1. Remove the engine protection from the bottom.

2. Unscrew the plug (1) from the drain hole at the bottom of the radiator and remove the radiator cap.

Caution: Perform this operation when the engine is cold.

• When draining all coolant from the system, remove the drain plugs from the cylinder block. See below.

3. If necessary, remove the reservoir, drain the coolant and clean the reservoir before installation.

• It is necessary to remove the insulator of the right engine mount. See chapter "Mechanical part of the engine".
• Slide the tank (3) and remove it in the order indicated by the numbers in the figure.

4. Check the drained coolant for contaminants such as rust, corrosion, and color changes. If there are any signs of contamination, flush the engine cooling system. See below.

Refueling

1. If removed, install the tank and screw the plug into the radiator drain hole.

Caution: Clean the drain plug and screw it in, installing a new O-ring.

Radiator Drain Plug: See below.

• If the drain plugs in the cylinder block were removed, replace and tighten them. See Chapter "Mechanical part of the engine".

2. Make sure the hose clamps are tight.

3. Remove the air duct and resonator assembly and move the electric throttle actuator to the side. See Chapter "Mechanical part of the engine".

4. Disconnect the heater hose (1) at the location indicated by the arrow () in the picture.

• Raise the heater hose as high as possible.

5. Fill the radiator (1) to the required level.

Caution: Do not allow coolant to come into contact with electronic components (generator etc).

• Pour the coolant slowly at a rate of less than 2 liters per minute to allow air to escape from the system.
• When coolant begins to flow out of the heater, reconnect the heater hose and continue filling.
• Use genuine Nissan antifreeze coolant or equivalent mixed with water (distilled or desalted). See the chapter "Maintenance".

Engine coolant filling capacity (with tank at "MAX" level):

See below p. "Technical data and specifications"

6. Fill the tank with coolant up to the "MAX" mark.



Tank filling capacity (at the MAX level):

See below p. "Technical data and specifications".

7. Screw the cap back on the radiator.

8. Install the electric throttle actuator, air duct and resonator assembly. See Chapter "Mechanical part of the engine".

9. Warm up the engine until the thermostat opens. The standard warm-up time is about 10 minutes at an engine speed of 3000 rpm.

• To determine if the thermostat is opening, touch the lower radiator hose with your hand and make sure that warm fluid flows through it.

Caution: To avoid overheating the engine, watch the coolant temperature gauge.

10. Stop the engine and cool down to below 50°C.

• To save time, cool with a fan.
• If necessary, fill the radiator with coolant up to the filler neck.

Caution: Do not allow coolant to come into contact with electronic components (generator, etc.).

11. Fill the tank with coolant up to the "MAX" mark.

12. Repeat steps 5-10 two or more times, tightening the radiator cap until the coolant level stops dropping.

13. Check for leaks in the cooling system with the engine running.

14. Warm up the engine and check for leaking coolant by increasing engine speed from idle to 3000 rpm and setting the heater temperature control to several positions between "COOL" and "WARM".

• A sound may be heard from the heater.

15. Repeat step 14 three times.

16. If a sound is heard, bleed the cooling system by repeating steps 5-10 until the coolant level stops dropping.

Flushing the cooling system

1. If removed, install the tank and screw the plug into the radiator drain hole.

Caution: Clean the drain plug and screw it in, installing a new O-ring.

Radiator Drain Plug: See below.

• If the drain plugs in the cylinder block were removed, replace and tighten them. See Chapter "Mechanical part of the engine".

2. Remove the air duct and resonator assembly and move the electric throttle actuator to the side. See Chapter "Mechanical part of the engine".

3. Disconnect the heater hose (1) at the location indicated by the arrow () in the picture.

• Raise the heater hose as high as possible.

4. Fill the radiator and reservoir with engine coolant and tighten the radiator cap.

• When coolant begins to flow out of the heater hose, reconnect the heater hose and continue filling.

5. Install the electric throttle actuator, air duct and resonator assembly. See Chapter "Mechanical part of the engine".

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

7. Press the accelerator pedal two or three times without load.

8. Turn off the engine and wait until it cools down.

9. Drain the water from the system. See above.

10. Repeat steps 1-9 until clean water starts flowing out of the radiator.