check engine NISSAN X-TRAIL 2003 Service Manual Online

LU-28
[YD22DDTi]
OIL COOLER

OIL COOLERPFP:21305
Removal and InstallationEBS00OE8
CAUTION:

Be careful not to get burned when engine and engine oil are hot.

When removing, prepare a shop cloth to absorb any engine oil leakage or spillage.

Completely wipe off any engine oil that adhere to engine and vehicle.
REMOVAL
1. Remove engine undercover.
2. Drain engine coolant by removing cylinder block drain plug and radiator drain plug. Refer to CO-31,
"DRAINING ENGINE COOLANT" and EM-212, "CYLINDER BLOCK" .
3. Remove exhaust front tube. Refer to EX-2, "
EXHAUST SYSTEM" .
4. Remove water hoses.
5. Loosen connecting bolt and remove oil cooler.
INSPECTION AFTER REMOVAL
Check oil cooler for cracks. Check oil cooler for clogging by blowing through coolant inlet. If necessary, replace
oil cooler.
INSTALLATION
Installation is in the reverse order of removal.

Confirm that no foreign objects are adhering to the installation
planes of oil cooler or cylinder block.

Tighten the connecting bolt after aligning the stopper on the cyl-
inder block side with protrusion of oil cooler.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level and the engine coolant level, and add engine oil and engine coolant. Refer to
LU-20, "
ENGINE OIL" and CO-31, "ENGINE COOLANT" .
1. Oil cooler 2. O-ring 3. Water hose
4. Gasket 5. Water hose connector 6. Connecting bolt
PBIC2441E
SBIA0126E

OIL COOLER
LU-29
[YD22DDTi]
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2. Start engine, and make sure that there is no leaks of engine oil or engine coolant.
3. Stop engine and wait for 10 minutes.
4. Check the engine oil level and the engine coolant level again. Refer to LU-20, "
ENGINE OIL" and CO-31,
"ENGINE COOLANT" .

LU-30
[YD22DDTi]
OIL PUMP

OIL PUMPPFP:15010
Removal and InstallationEBS01AJ3
REMOVAL
Remove oil pump housing. Refer to EM-185, "PRIMARY TIMING CHAIN" .
INSTALLATION
Install in the reverse order of removal.
INSPECTION AFTER INSTALLATION
1. After warming up engine, check there is no leaks of engine oil.
2. Stop engine and wait for 10 minutes.
3. Check the engine oil level and add engine oil. Refer to LU-20, "
ENGINE OIL" .
Disassembly and AssemblyEBS01AI7
DISASSEMBLY
1. Remove oil pump cover.
2. Remove inner rotor and outer rotor from oil pump housing.
3. After removing regulator plug, remove inner and outer regulator springs and regulator valve.
INSPECTION AFTER DISASSEMBLY
Clearance of Oil Pump Parts

Measure the clearance with feeler gauge.
Clearance between outer rotor and oil pump housing (position 1)
Tip clearance between inner rotor and outer rotor (position 2)
1. Oil pump housing 2. Outer rotor 3. Inner rotor
4. Oil pump cover 5. Regulator valve 6. Outer regulator spring
7. Inner regulator spring 8. Regulator plug
PBIC2381E
Standard : 0.114 - 0.260 mm (0.0045 - 0.0102 in)
Standard : Below 0.18 mm (0.0071in)
JLC355B

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION
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ENGINE COOLING SYSTEM
QR
PRECAUTIONS .......................................................... 3
Precautions for Liquid Gasket .................................. 3
LIQUID GASKET APPLICATION PROCEDURE ..... 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
OVERHEATING CAUSE ANALYSIS .......................... 5
Troubleshooting Chart .............................................. 5
COOLING SYSTEM .................................................... 7
Cooling Circuit .......................................................... 7
System Chart ........................................................... 8
ENGINE COOLANT .................................................... 9
Inspection ................................................................. 9
LEVEL CHECK ..................................................... 9
LEAK CHECK ....................................................... 9
Changing Engine Coolant ........................................ 9
DRAINING ENGINE COOLANT ........................... 9
REFILLING ENGINE COOLANT ........................ 10
FLUSHING COOLING SYSTEM ......................... 10
RADIATOR ................................................................ 12
Removal and Installation ........................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 13
INSPECTION AFTER INSTALLATION ............... 13
Checking Radiator Cap .......................................... 13
Checking Radiator .................................................. 13
RADIATOR (ALUMINUM TYPE) .............................. 14
Disassembly and Assembly ................................... 14
PREPARATION ................................................... 14
DISASSEMBLY ................................................... 14
ASSEMBLY ......................................................... 15
INSPECTION ...................................................... 17
COOLING FAN ......................................................... 18
Removal and Installation ........................................ 18
REMOVAL ........................................................... 18
INSTALLATION ................................................... 18
DISASSEMBLY AND ASSEMBLY ...................... 18WATER PUMP .......................................................... 20
Removal and Installation ........................................ 20
REMOVAL ........................................................... 20
INSPECTION AFTER REMOVAL ....................... 21
INSTALLATION ................................................... 21
INSPECTION AFTER INSTALLATION ................ 21
THERMOSTAT AND WATER CONTROL VALVE .... 22
Removal and Installation ........................................ 22
REMOVAL ........................................................... 22
INSPECTION AFTER REMOVAL ....................... 23
INSTALLATION ................................................... 23
INSPECTION AFTER INSTALLATION ................ 23
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 24
Standard and Limit .................................................. 24
CAPACITY ........................................................... 24
THERMOSTAT .................................................... 24
WATER CONTROL VALVE ................................. 24
RADIATOR .......................................................... 24
Tightening Torque ................................................... 24
YD22DDTi
PRECAUTIONS ........................................................ 25
Precautions For Liquid Gasket ............................... 25
LIQUID GASKET APPLICATION PROCEDURE ... 25
PREPARATION ......................................................... 26
Special Service Tools ............................................. 26
Commercial Service Tools ...................................... 26
OVERHEATING CAUSE ANALYSIS ........................ 27
Troubleshooting Chart ............................................ 27
COOLING SYSTEM .................................................. 29
Cooling Circuit ........................................................ 29
System Chart .......................................................... 30
ENGINE COOLANT .................................................. 31
Inspection ............................................................... 31
LEVEL CHECK .................................................... 31

CO-2 CHECKING RADIATOR SYSTEM FOR LEAKS ... 31
Changing Engine Coolant ....................................... 31
DRAINING ENGINE COOLANT .......................... 31
REFILLING ENGINE COOLANT ......................... 32
FLUSHING COOLING SYSTEM ......................... 33
RADIATOR ................................................................ 34
Removal and Installation ........................................ 34
REMOVAL ........................................................... 34
INSTALLATION .................................................... 34
INSPECTION AFTER INSTALLATION ................ 34
Checking Radiator Cap .......................................... 35
Checking Radiator .................................................. 35
COOLING FAN .......................................................... 36
Removal and Installation ........................................ 36
REMOVAL ........................................................... 36
INSTALLATION .................................................... 36
DISASSEMBLY AND ASSEMBLY ....................... 36
RADIATOR (ALUMINUM TYPE) ............................... 38
Disassembly and Assembly .................................... 38
PREPARATION ................................................... 38
DISASSEMBLY ................................................... 38
ASSEMBLY ......................................................... 39
INSPECTION ....................................................... 41WATER PUMP ........................................................... 42
Removal and Installation ......................................... 42
REMOVAL ............................................................ 42
INSPECTION AFTER REMOVAL ........................ 43
INSTALLATION .................................................... 43
INSPECTION AFTER INSTALLATION ................ 43
THERMOSTAT AND WATER PIPING ....................... 44
Removal and Installation ......................................... 44
REMOVAL ............................................................ 44
INSPECTION AFTER REMOVAL ........................ 45
INSTALLATION .................................................... 45
INSPECTION AFTER INSTALLATION ................ 45
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 46
Standard and Limit .................................................. 46
CAPACITY ........................................................... 46
THERMOSTAT ..................................................... 46
RADIATOR ........................................................... 46
Tightening Torque ................................................... 46

OVERHEATING CAUSE ANALYSIS
CO-5
[QR]
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OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartEBS00KOD
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat and water con-
trol valve stuck closed—
Damaged finsDust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
Fan assembly — High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio—— —
Poor engine coolant quality — Engine coolant viscosity —
Insufficient engine coolantEngine coolant leaksCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration

CO-6
[QR]
OVERHEATING CAUSE ANALYSIS

Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Power train system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

ENGINE COOLANT
CO-9
[QR]
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ENGINE COOLANTPFP:KQ100
InspectionEBS00KOG
LEVEL CHECK

Check if the reservoir tank engine coolant level is within “MIN” to
“MAX” range when engine is cool.

Adjust engine coolant level as necessary.
LEAK CHECK

To check for leakage, apply pressure to the cooling system with
a radiator cap tester (commercial service tool) and a radiator
cap tester adapter (special service tool).
WARNING:
Do not remove radiator cap when engine is hot. Serious burns
could occur from high-pressure engine coolant escaping from
radiator.
CAUTION:
Higher test pressure than specified may cause radiator damage.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

If anything is found, repair or replace damaged parts.
Changing Engine CoolantEBS00KOH
WARNING:

To avoid being scalded, do not change engine coolant when engine is hot.

Wrap a thick cloth around radiator cap and carefully remove the cap. First, turn the cap a quarter
of a turn to release built-up pressure. Then turn the cap all the way.

Be careful not to allow engine coolant to contact drive belt.
DRAINING ENGINE COOLANT
1. Remove RH and LH undercovers.
2. Open radiator drain plug at the bottom of radiator, and then
remove radiator cap.
When drain all of engine coolant in the system, open water drain plug on cylinder block. Refer to
EM-82, "
CYLINDER BLOCK" .
3. Remove reservoir tank and drain engine coolant.
SMA412B
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2 , 23 psi)
SLC134B
PBIC2250E

CO-10
[QR]
ENGINE COOLANT

4. Check drained engine coolant for contaminants such as rust, corrosion or discoloration. If contaminated,
flush the engine cooling system. Refer to CO-10, "
FLUSHING COOLING SYSTEM" .
REFILLING ENGINE COOLANT
1. Install reservoir tank, and radiator drain plug.
CAUTION:
Be sure to clean radiator drain plug and install with new O-ring.

If water drain plug on cylinder block is removed, close and tighten it. Refer to EM-82, "CYLINDER
BLOCK" .
2. Fill radiator and reservoir tank to specified level.

Pour engine coolant through engine coolant filler neck
slowly of less than 2 (1-3/4 lmp qt) a minute to allow air
in system to escape.

Use Genuine Nissan Anti-freeze Coolant or equivalent
mixed with water (distilled or demineralized). Refer to
MA-17, "
RECOMMENDED FLUIDS AND LUBRICANTS".
3. Warm up engine to normal operating temperature with radiator cap installed.
4. Run engine at 3,000 rpm for 10 seconds and return to idle speed.

Repeat two or three times.
CAUTION:
Watch water temperature gauge so as not to overheat the engine.
5. Stop engine and cool down to less than approximately 50°C (122°F).

Cool down using a fan to reduce the time.

If necessary, refill radiator up to filler neck with engine coolant.
6. Refill reservoir tank to “MAX” level line with engine coolant.
7. Repeat steps 2 through 5 two or more times with radiator cap installed until engine coolant level no longer
drops.
8. Check cooling system for leaks with engine running.
9. Warm up 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.
10. Repeat step 9 three times.
11. If sound is heard, bleed air from cooling system by repeating steps 2 through 5 until engine coolant level
no longer drops.

Clean excess engine coolant from engine.
FLUSHING COOLING SYSTEM
1. Fill radiator and reservoir tank with water and reinstall radiator cap.
2. Run engine and warm it up to normal operating temperature.Engine coolant capacity
(with reservoir tank at “MAX” level)
: Approx. 7.1 (6-1/4 lmp qt)
SMA182B
Reservoir tank capacity (at “MAX” level)
: 0.6 (1/2 lmp qt)
SMA412B

RADIATOR
CO-13
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INSTALLATION
Install in the reverse order of removal.
INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using a radiator cap tester adapter (special service tool: EG17650301)
and a radiator cap tester (commercial service tool). Refer to CO-9, "
LEAK CHECK" .

Start and warm up engine. Visually check if there is no leaks of engine coolant and A/T fluid (A/T models).
Checking Radiator CapEBS00KOK
1. Pull negative-pressure valve to open it and make sure that it
closes completely when released.

Make sure that there is no dirt or damage on the valve seat of
radiator cap negative-pressure valve.

Make sure that there are no unusualness in the opening and
closing conditions of negative-pressure valve.
2. Check radiator cap relief pressure.

When connecting radiator cap to radiator cap tester (commer-
cial service tool) and radiator cap tester adapter (special ser-
vice tool), apply engine coolant to radiator cap seal surface.

Replace radiator cap if there is an unusualness in negative-
pressure valve, or if the relief pressure falls below the limit.
Checking RadiatorEBS00KOL
Check radiator for mud or clogging. If necessary, clean radiator as follows.

Be careful not to bend or damage radiator fins.

When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surface 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 vertically downward.

Use compressed air lower than 490 kPa (4.9 bar, 5 kg/cm2 , 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.
SMA967B
Standard:

78 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2 , 11 - 14 psi)
Limit:

59 kPa (0.59 bar, 0.6 kg/cm
2 , 9 psi)
SLC135B