Engine Cooling System: Other Nissan Armada I facelift

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the " SRS AIRBAG " and " SEAT BELTS " articles.

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1. After removing the bolts and nuts, separate the mating surface and remove the old liquid gasket sealing using Tool. Tool number : KV10111100 (J-37228) CAUTION: Do not damage the mating surfaces.
2. Tap the seal cutter to insert it (1).
3. In areas where the Tool is difficult to use, lightly tap to slide it (2).

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1. Remove the old liquid gasket adhering to the gasket application surface and the mating surface using suitable tool. Remove the liquid gasket completely from the groove of the liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering moisture, grease and foreign material.
3. Attach the liquid gasket tube to the Tool.
4. Apply the liquid gasket without breaks to the specified location with the specified dimensions.

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1. If there is a groove for the liquid gasket application, apply the liquid gasket to the groove.
2. As for the bolt holes, normally apply the liquid gasket inside the holes. If specified in the procedure, it should also be applied outside the holes.
3. Within five minutes of liquid gasket application, install the mating component.
4. If the liquid gasket protrudes, wipe it off immediately.
5. Do not retighten after the installation.
6. Wait 30 minutes or more after installation before refilling the engine with engine oil and engine coolant.

Special Service Tool

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

SPECIAL SERVICE TOOL SPECIFICATION Tool number (Kent-Moore No.) Tool name Description KV10111100 (J-37228) Seal cutter Removing steel oil pan and rear timing chain case WS39930000 (-) Tube pressure Pressing the tube of liquid gasket EG17650301 (J-33984-A) Radiator cap tester adapter Adapting radiator cap tester to radiator cap and radiator filler neck 28 (1.10) dia . 31.4 (1.236) dia . 41.3 (1.626) dia . Unit: mm (in) KV991J0070 (J-45695) Coolant refill tool For refilling engine cooling system KV991J0010 (J-23688) Engine coolant refractometer Checking concentration of ethylene glycol in engine coolant

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Commercial Service Tool

COMMERCIAL SERVICE TOOL SPECIFICATION Tool name Description Power tool Loosening bolts and nuts Radiator cap tester Checking radiator and radiator cap Coolant system tester adapter Adapting radiator cap tester to reservoir filler neck Coolant system tester adapter Adapting radiator cap tester to reservoir cap

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LEVEL CHECK

1. Check if the engine coolant reservoir tank level is within MIN to MAX level when engine is cool.
2. Adjust engine coolant level as necessary.

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CHECKING COOLING SYSTEM FOR LEAKS

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1. To check for leakage, apply pressure to the cooling system at the reservoir filler neck using suitable tool and Tool. Tool number : EG17650301 (J-33984-A) Leakage test pressure : 137 kPa (1.4 kg/cm, 20 psi) CAUTION: Higher pressure than specified may cause radiator damage. NOTE: In case that engine coolant decreases, replenish cooling system with engine coolant.
2. If any concerns are found, repair or replace damaged parts.

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1. Check reservoir cap relief pressure using suitable tool and Tool. Tool number : EG17650301 (J-33984-A) Standard : 95 - 125 kPa (0.97 - 1.28 kg/cm 2 , 14 - 18 psi) NOTE: Apply engine coolant to the cap seal.
2. Replace the reservoir cap if there is any damage in the negative-pressure valve, or if the open-valve pressure is outside of the limit.

CHECKING RADIATOR CAP

Inspect the radiator cap.

Note. Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.

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1. Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
2. Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the metal retainer.
3. Pull negative-pressure valve to open it and make sure that it closes completely when released.
4. Make sure that there is no dirt or damage on the valve seat of radiator cap negative-pressure valve.
5. Make sure that there are no unusualness in the opening and closing conditions of negative-pressure valve.

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Changing Engine Coolant

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1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest temperature position. Wait 10 seconds and turn ignition switch OFF.
2. Remove the engine front undercover using power tool.
3. 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.
4. When draining all of the coolant in the system for engine removal or repair, it is necessary to drain the cylinder block. Remove the RH cylinder block drain plug to drain the right bank and the oil cooler hose to drain the left bank as shown.
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.

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1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, 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 plug. Use Genuine High Performance Thread Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-320178-S17417948952009071300000) ". Radiator drain plug : Refer to «RADIATOR»(ref-320186-S16094514662009071300000) . RH cylinder block drain plug : Refer to «DISASSEMBLY AND ASSEMBLY»(ref-320185-S23393969492009071300000) .
2. 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.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling system.
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 demineralized water. Refer to " «FLUIDS AND LUBRICANTS»(ref-320187-S28858193382009071300000) ". Cooling system capacity (with reservoir) : Refer to " «FLUIDS AND LUBRICANTS»(ref-320187-S28858193382009071300000) ".
6. Install an air hose to the venturi assembly, the air pressure must be within specification. Compressed air supply pressure : 5.7 - 8.5 kPa (5.6 - 8.4 kg/cm 2 , 80 - 120 psi) 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.
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 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 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 and install the radiator cap.
12. Remove the non-vented reservoir cap.
13. Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system and top up the system as necessary before installing the vented reservoir cap.

Checking Radiator

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

1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces.
3. Stop washing when dirt and debris 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 (5 kg/cm 2 , 71 psi) and keep distance more than 30 cm (11.8 in).
5. Blow air again into all the radiator core surfaces until no water sprays out.

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Fan Coupling

Inspect fan coupling for oil leakage and bimetal conditions.

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Fan Bracket

1. Visually check that there is no significant looseness in the fan bracket shaft, and that it turns smoothly by hand.
2. If there are any unusual concerns, replace the cooling fan pulley.

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THERMOSTAT

THERMOSTAT VALVE OPENING TEMPERATURE SPECIFICATION

RADIATOR

RESERVOIR CAP RELIEF PRESSURE SPECIFICATION