Nissan X-Trail 32. Manual - part 1559

MA-26

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ENGINE MAINTENANCE (MR20DD)

ENGINE MAINTENANCE (MR20DD)

DRIVE BELTS

DRIVE BELTS : Exploded View

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DRIVE BELTS : Inspection

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WARNING:

Perform this step when engine is stopped.
• Check that the indicator (notch on fixed side) of drive belt auto-tensioner is within the possible use range 

in the figure.
NOTE:
• Check the drive belt auto-tensioner indication when the engine is cold.
• When new drive belt is installed, the indicator (notch on fixed side) should be within the range 

 in the fig-

ure.

• Visually check entire drive belts for wear, damage or cracks.
• If the indicator (notch on fixed side) is out of the possible use range or belts is damaged, replace belts.

DRIVE BELTS : Adjustment

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ENGINE COOLANT

Alternator

Drive belt auto-tensioner

Crankshaft pulley

A/C compressor

Water pump

Drive belt

Possible use range

Range when new drive belt is in-
stalled

Indicator

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Alternator

Drive belt auto-tensioner

Crankshaft pulley

A/C compressor

Water pump

Drive belt

Possible use range

Range when new drive belt is in-
stalled

Indicator

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Refer to 

: 

EM-132, "Drive Belt"

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ENGINE MAINTENANCE (MR20DD)

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ENGINE COOLANT : Inspection

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LEVEL 

• Check that the reservoir tank engine coolant level is within the

“MIN” to “MAX” when the engine is cool.

• Adjust the engine coolant level if necessary.

CAUTION:

Refill Genuine NISSAN Long Life Antifreeze/Coolant (blue) or
equivalent in its quality mixed with water (distilled or deminer-
alized). Refer to 

MA-23, "Fluids and Lubricants"

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LEAKAGE

• To check for leakage, apply pressure to the cooling system with the

radiator cap tester (commercial service tool) (A) and the radiator
cap tester adapter (commercial service tool) (B).

WARNING:

Never remove radiator cap when engine is hot. Serious burns
may occur from high-pressure engine coolant escaping from
engine cooling system.

CAUTION:

Higher test pressure than specified may cause radiator dam-
age.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

• If anything is found, repair or replace damaged parts.

ENGINE COOLANT : Draining

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WARNING:

• Never remove radiator cap when engine is hot. Serious burns may occur from high-pressure engine

coolant escaping from radiator. 

• Wrap a thick cloth around the radiator cap. Slowly turn it a quarter of a turn to release built-up pres-

sure. Then turn it all the way.

1.

Remove engine under cover. Refer to 

EXT-39, "ENGINE UNDER COVER : Exploded View"

.

2.

Open radiator drain plug 

 at the bottom of radiator, and then

remove radiator cap. 

CAUTION:

Perform this step when engine is cold.
• When draining all of engine coolant in the system, open water

drain plugs on cylinder block. Refer to 

EM-61, "Setting"

.

3.

Remove reservoir tank if necessary, and drain engine coolant and clean reservoir tank before installing. 

: MAX

: MIN

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Testing pressure: Refer to 

CO-31, "Radiator"

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PBIC5121J

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ENGINE MAINTENANCE (MR20DD)

• Move reservoir tank 

, and then remove it numerical order as

shown in the figure.

4.

Check drained engine coolant for contaminants such as rust, corrosion or discoloration. If contaminated,
flush the engine cooling system. Refer to 

CO-15, "Flushing"

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ENGINE COOLANT : Refilling

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CAUTION:

• Do not put additive such as waterleak preventive, since it may cause cooling waterway clogging.
• When refilling use Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent in its quality

mixed with water (distilled or demineralized). Refer to 

MA-23, "Fluids and Lubricants"

.

1.

Install reservoir tank if removed and radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring.

• If water drain plugs on cylinder block are removed, close and tighten them. Refer to 

EM-107, "Disas-

sembly and Assembly"

.

2.

Check that each hose clamp has been firmly tightened.

3.

 Fill radiator to specified level.

CAUTION:

Never adhere the engine coolant to electronic equipments
(alternator etc.).
• Pour coolant slowly of less than 2   (1-3/4 Imp qt) a

minute to allow air in system to escape.

4.

Refill reservoir tank to “MAX” level line with engine coolant.

5.

Install radiator cap.

6.

Warm up engine until opening thermostat. Standard for warming-up time is approximately 10 minutes at
3,000 rpm.
• Check thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

: Nut

: Pawl

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Radiator drain plug

: Refer to 

CO-17, "Exploded View"

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Engine coolant capacity
(With reservoir tank at “MAX” level)

 Refer to 

CO-31, "Periodical Maintenance Specification"

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: MAX

: MIN

Reservoir tank engine coolant capacity 
(At “MAX” level)

Refer to 

CO-31, "Periodical Maintenance Specification"

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ENGINE MAINTENANCE (MR20DD)

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7.

Stop the engine and cool down to less than approximately 50

°

C (122

°

F).

• Cool down using fan to reduce the time.
• If necessary, refill radiator up to filler neck with engine coolant.

CAUTION:

Never adhere the engine coolant to electronic equipments (alternator etc.).

8.

Refill reservoir tank to “MAX” level line with engine coolant.

9.

Repeat steps 5 through 8 two or more times with radiator cap installed until engine coolant level no longer
drops. 

10. Check cooling system for leakage with engine running.
11. Warm up the engine, and check for sound of engine coolant flow while running engine from idle up to

3,000 rpm with heater temperature controller set at several position between “COOL” and “WARM”.
• Sound may be noticeable at heater unit.

12. Repeat step 11 three times.

13. If sound is heard, bleed air from cooling system by repeating step 5 through 8 until reservoir tank level no

longer drops. 

ENGINE COOLANT : Flushing

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1.

Install reservoir tank if removed and radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring.

• If water drain plugs on cylinder block are removed, close and tighten them. Refer to 

EM-107, "Disas-

sembly and Assembly"

.

2.

Fill radiator and reservoir tank with water and reinstall radiator cap.

3.

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

4.

Rev the engine two or three times under no-load.

5.

Stop the engine and wait until it cools down.

6.

Drain water from the system. Refer to 

CO-13, "Draining"

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7.

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

RADIATOR CAP

RADIATOR CAP : Inspection

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• Check valve seat 

 of radiator cap. 

- Check that valve seat is swollen to the extent that the edge of the

plunger 

 cannot be seen when watching it vertically from the top.

- Check that valve seat has no soil and damage.
- Check that there is no dirt or damage on the valve seat of radiator

cap negative-pressure valve. 

- Check that there are no unusualness in the opening and closing

conditions of negative-pressure valve.

Radiator drain plug

: Refer to 

CO-17, "Exploded View"

.

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