Engine Cooling System (Vq): Other Nissan Frontier D40

Special Service Tools

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

SPECIAL SERVICE TOOLS REFERENCE Tool number (Kent-Moore No.) Tool name Description 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) KV10111100 (J-37228) Seal cutter Removing chain tensioner cover and water pump cover WS39930000 ( - ) Tube presser Pressing the tube of liquid gasket KV991J0070 (J-45695) Coolant refill tool Filling cooling system KV991J0010 (J-23688) Engine coolant refractometer Checking concentration of ethylene glycol in engine coolant

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Scheme 67

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Commercial Service Tools

COMMERCIAL SERVICE TOOLS REFERENCE Tool name Description Power tool Loosening nuts and bolts Radiator cap tester Checking radiator and radiator cap

Scheme 69

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

Scheme 70

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. (Scheme 68): Checking Coolant Level

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: 137 kPa (1.4 kg/cm 2 , 20 psi)

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1. Check reservoir 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) see scheme 9: Checking Radiator Cap Relief Pressure When connecting the reservoir cap to the tester, apply water or coolant to the cap seal surface. Replace the reservoir 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.

1. Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward.
2. Apply water again to all radiator core surfaces 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, 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).
5. Blow air again into all the radiator core surfaces once per minute until no water sprays out.
6. Check for leaks.

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 reservoir cap. This is the only step required when partially draining the cooling system (radiator only). CAUTION: Do not to allow the coolant to contaminate the drive belts. see scheme 10: Identifying Radiator Drain Plug
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 cylinder block drain plugs, and block heater if equipped, to drain the cylinder block as shown. NOTE: For Canada, the "D" cylinder block drain plug as shown, is not a cylinder block drain plug but a block heater. (Scheme 70): Identifying Cylinder Block Components
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. If the coolant is contaminated, flush the engine cooling system. Refer to " «DRAINING ENGINE COOLANT»(ref-272353-S18152922612007111800000) ".

Fan Coupling

Inspect fan coupling for oil leakage and bimetal conditions.

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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 fan bracket assembly. see scheme 22: Checking Fan Bracket

RADIATOR

RADIATOR SPECIFICATIONS

THERMOSTAT

THERMOSTAT SPECIFICATIONS