Engine Cooling System: Other Nissan Quest III

Precautions 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 SUPPLEMENTAL RESTRAINT SYSTEM and SEAT BELTS articles .

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1. After removing the bolts and nuts, separate the mating surface using the Tool and remove the sealant. Tool number : KV10111100 (J-37228) CAUTION: Be careful not to damage the mating surfaces.
2. In areas where the Tool is difficult to use, use a plastic hammer to lightly tap (1) the Tool where the sealant is applied. Use a plastic hammer to slide the Tool (2) by tapping on the side. CAUTION: If for some unavoidable reason a tool such as a flat-bladed screwdriver is used, be careful not to damage the mating surfaces.

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1. Using a scraper, remove the old sealant adhering to the mating surfaces. Remove the sealant completely from the groove of the mating surfaces, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove all adhering moisture, grease and foreign material.
3. Attach the sealant tube to Tool. Use Genuine RTV Silicone Sealant or equivalent. Refer to , " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-239935-S21612245322006080400000) ".
4. Apply the sealant without breaks to the specified location with the specified dimensions using Tool. Tool number : WS39930000 ( - ) If there is a groove for the sealant application, apply the sealant to the groove. As for the bolt holes, normally apply the sealant inside the holes. If specified in the procedure, it should also be applied outside the holes. Within five minutes of sealant application, install the mating component. If the sealant protrudes, wipe it off immediately. Do not retighten after the installation. After 30 minutes or more have passed from the installation, fill the engine with the specified oil and coolant. Refer to , " «RECOMMENDED FLUIDS AND LUBRICANTS»(ref-239943-S32797248202006080300000) ". CAUTION: If there are specific instructions in this manual, observe them.

Special Service Tools

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

SPECIAL SERVICE TOOLS DESCRIPTION Tool number (Kent-Moore No.) Tool name Description KV10111100 (J-37228) Seal cutter Removing oil pan and timing chain case WS39930000 ( - ) Tube presser 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 a: 28 (1.10) dia. b: 31.4 (1.236) dia. c: 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 Tools

COMMERCIAL SERVICE TOOLS DESCRIPTION Tool name Description Power tool Loosening bolts and nuts

System Check

CHECKING COOLING SYSTEM HOSES

Check hoses for the following

1. Improper attachment
2. Leaks
3. Cracks
4. Damage
5. Loose connections
6. Chafing
7. Deterioration

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1. Check if the reservoir tank coolant level is within MIN to MAX when the engine is cool.
2. Adjust coolant level if it is too much or too little.

CHECKING COOLING SYSTEM FOR LEAKS

To check for leakage, apply pressure to the cooling system using Tool.

Tool number : EG17650301 (J-33984-A)

Testing pressure : 157 kPa (1.6 kg/cm 2 , 23 psi)

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1. Inspect the radiator cap. Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket. Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the metal retainer. NOTE: Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
2. Pull the negative-pressure valve to open it and check that it closes completely 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 closing conditions of the negative-pressure valve.
3. Check radiator cap relief pressure using Tool. Tool number : EG17650301 (J-33984-A) Standard: 78 - 98 kPa (0.8 - 1.0 kg/cm 2 , 11 - 14 psi) Limit: 59 kPa (0.6 kg/cm 2 , 9 psi) 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 negative-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

1. Be careful not to bend or damage the radiator fins.
2. 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. Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward. Apply water again to all radiator core surfaces once per minute. Stop washing if any stains no longer flow out from the radiator. 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 2 , 71 psi) and keep distance more than 30 cm (11.8 in). Blow air again into all the radiator core surfaces once per minute until no water sprays out. Check for leaks.

Changing Engine Coolant

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1. Remove engine undercover.
2. Open radiator drain plug at the bottom of radiator and remove the radiator filler cap. This is the only step required for a partial cooling system drain.
3. For a complete cooling system drain, remove the reservoir tank and drain the coolant, and then clean the reservoir tank before installation. Do not allow coolant to spill on the drive belts.
4. When performing a complete cooling system drain (to remove the engine or for engine repair), remove the cylinder block front drain plug and the cylinder block RH and LH drain plugs. CAUTION: If the vehicle is equipped with an engine block heater in place of the cylinder block LH drain plug, do not remove the engine block heater.
5. Check the drained coolant for contaminants such as rust, corrosion or discoloration. If contaminated, flush the engine cooling system. Refer to , " «FLUSHING COOLING SYSTEM»(ref-239944-S13557270932006080400000) ".

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1. Install the radiator drain plug. If the cooling system was drained completely, install the reservoir tank and the cylinder block drain plugs and tighten to specification. CAUTION: If the vehicle is equipped with an engine block heater in place of the cylinder block LH drain plug, do not remove the engine block heater. 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 , " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-239935-S21612245322006080400000) ". Radiator drain plug : Refer to , " «RADIATOR»(ref-239944-S31900986342006080400000) ". Cylinder block front drain plug : Refer to , " «CYLINDER BLOCK»(ref-239942-S37060284972006080400000) ". Cylinder block RH drain plug : Refer to , " «CYLINDER BLOCK»(ref-239942-S37060284972006080400000) ". Cylinder block LH drain plug : Refer to , " «CYLINDER BLOCK»(ref-239942-S37060284972006080400000) ".
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. Turn the vehicle ignition ON with the engine OFF as necessary to activate the heater mode.
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. Tool number : KV991J0070 (J-45695)
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 , " «ANTI-FREEZE COOLANT MIXTURE RATIO»(ref-239943-S30715063122006080300000) ". Engine coolant capacity (with reservoir) : Refer to , " «FLUIDS AND LUBRICANTS»(ref-239943-S04533857262006080300000) ".
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. 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
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.
12. Fill the cooling system reservoir tank to the specified level, and install the radiator cap. Run the engine to warm up the cooling system and top up the system as necessary.

THERMOSTAT

THERMOSTAT VALVE TEMPERATURE

RADIATOR

RADIATOR SPECIFICATION