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Engine Cooling System (Qr): Removal & Installation Nissan Frontier D40

Cooling Fan 5 illustrations ~886 words

INSTALLATION

Installation is in the reverse order of removal.

REMOVAL

  1. Remove air duct. Refer to " «REMOVAL»(ref-272352-S24758799732007111800000) ".
  2. Remove the engine front undercover.
  3. Remove the upper and lower radiator shrouds. Refer to " «REMOVAL»(ref-272341-S26322082742007111800000) ".
  4. Remove drive belts. Refer to " «REMOVAL»(ref-272352-S19306825062007111800000) ".
  5. Remove cooling fan.

Installation is in the reverse order of removal.

  1. Install cooling fan with its front mark "F" facing front of engine. Refer to " «INSTALLATION»(ref-272341-S26150980192007111800000) ".
  1. Drain engine coolant from radiator drain plug at the bottom of radiator and from water drain plug on cylinder block. Refer to " «DRAINING ENGINE COOLANT»(ref-272341-S41477433912007111800000) " and " «CYLINDER BLOCK»(ref-272340-S24105436542007111800000) ". CAUTION: Perform this step when the engine is cold. Do not spill engine coolant on drive belt.
  2. Remove air duct; Refer to " «AIR CLEANER AND AIR DUCT»(ref-272340-S39087684162007111800000) ".
  3. Remove drive belt; Refer to " «DRIVE BELTS»(ref-272340-S12862701502007111800000) ".
  4. Remove radiator hose (upper and lower). Refer to " «RADIATOR»(ref-272341-S00430165932007111800000) ".
  5. Remove cooling fan and water pump pulley. Refer to " «REMOVAL»(ref-272341-S26150980192007111800000) ".
  6. Remove water pump with power tool. CAUTION: Handle water pump vane so that it does not contact any other parts. Water pump cannot be disassembled and should be replaced as a unit. NOTE: Engine coolant will leak from cylinder block, so have a receptacle ready below.

Scheme 8

Scheme 8: INSPECTION AFTER REMOVAL
Scheme 8: INSPECTION AFTER REMOVAL
  1. Visually check if there is no significant dirt or rusting on water pump body and vane.
  2. Make sure that there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.
  3. Replace water pump, if necessary. see scheme 23: Inspecting Water Pump Body

Installation is in the reverse order of removal.

  1. When inserting heater pipe end into water pump and thermostat housing, apply a neutral detergent to O-ring. Then insert it immediately.
  1. Drain engine coolant. Refer to " «DRAINING ENGINE COOLANT»(ref-272341-S41477433912007111800000) " and " «CYLINDER BLOCK»(ref-272340-S24105436542007111800000) ". CAUTION: Perform this step when the engine is cold. Do not spill engine coolant on drive belt.
  2. Disconnect radiator hose (lower) at water inlet side. Refer to " «REMOVAL»(ref-272341-S26322082742007111800000) ".
  3. Remove water inlet and thermostat.

Scheme 9

Scheme 9: INSPECTION AFTER REMOVAL
Scheme 9: INSPECTION AFTER REMOVAL
  1. Place a thread so that it is caught in the valves of thermostat. Immerse fully in a container filled with water. Heat while stirring.
  2. The valve opening temperature is the temperature at which the valve opens and falls from the thread.
  3. Continue heating. Check the maximum valve lift amount. NOTE: The maximum valve lift amount standard temperature for water control valve is the reference value.
  4. After checking the maximum valve lift amount, lower the water temperature and check the valve closing temperature. see scheme 25: Checking Thermostat Valve

Installation is in the reverse order of removal.

Scheme 10

Scheme 10: Thermostat
Scheme 10: Thermostat

Scheme 11

Scheme 11
Scheme 11
  1. Install thermostat with making rubber ring groove fit to thermostat flange with the whole circumference. (Scheme 8): Identifying Thermostat Flange
  2. Install thermostat with jiggle valve facing upwards. (The position deviation may be within the range of 20° as shown.) see scheme 27: Identifying Thermostat With Jiggle Valve Facing Upwards
  1. Drain engine coolant. Refer to " «DRAINING ENGINE COOLANT»(ref-272341-S41477433912007111800000) ".
  2. Remove air cleaner and air duct assembly. Refer to " «REMOVAL»(ref-272340-S21683954242007111800000) ".
  3. Remove water pump. Refer to " «WATER PUMP»(ref-272341-S01200595202007111800000) ".
  4. Remove exhaust manifold cover. Refer to " «EXHAUST MANIFOLD AND THREE WAY CATALYST»(ref-272340-S34471099162007111800000) ".
  5. Remove oil level gauge and oil level gauge guide. Refer to " «CYLINDER BLOCK»(ref-272340-S24105436542007111800000) ". CAUTION: Plug the oil level gauge guide opening to prevent oil pan from entering foreign materials.
  6. Remove A/C compressor and position aside. Refer to " «REMOVAL AND INSTALLATION FOR COMPRESSOR»(ref-272335-S12775410362007111800000) ".
  7. Remove bolt for heater pipe at water pump and thermostat housing.
  8. Disconnect heater pipe from water pump and thermostat housing.
  9. Remove water pump and thermostat housing.

Installation is in the reverse order of removal.

  1. When inserting heater pipe end into water pump and thermostat housing, apply a neutral detergent to O-ring. Then insert it immediately.
CAUTIONPerform when the engine cold.
  1. Drain the engine coolant. Refer to " «CHANGING ENGINE COOLANT»(ref-272341-S09240769032007111800000) ".
  2. Remove the heater pipe, heater hose and water hoses.
  3. Remove the heater outlet.
  4. Remove the water control valve.

Installation is in the reverse order of removal.

  1. Install the engine coolant temperature sensor if removed. Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-272334-S29650495302007111800000) ".
  2. Install the water control valve with the whole circumference of the flange part fitting securely inside the rubber ring.
  3. Install the water control valve with the up-mark facing up and the frame center part facing upwards. The position deviation may be within the range of ±10°.

Identifying Water Outlet And Water Piping Components With Torque Specifications. Scheme 12

Scheme 12: Identifying Water Outlet And Water Piping Components With Torque Specifications
Scheme 12: Identifying Water Outlet And Water Piping Components With Torque Specifications
  1. Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug on the cylinder block. Refer to " «DRAINING ENGINE COOLANT»(ref-272341-S41477433912007111800000) " and " «CYLINDER BLOCK»(ref-272340-S24105436542007111800000) ". CAUTION: Perform this step when engine is cold. Do not spill engine coolant on drive belts.
  2. Disconnect radiator hose (upper) at water outlet side. Refer to " «RADIATOR»(ref-272341-S00430165932007111800000) ".
  3. Remove water outlet.
  4. Disconnect heater hoses and water hoses.
  5. Remove heater outlet and water control valve.
  6. Remove engine coolant temperature sensor as necessary. CAUTION: Be careful not to damage engine coolant temperature sensor.

Note the following, and install in the reverse order of removal.

  1. Securely insert each hose, and install clamp at a position where it does not interfere with the pipe bulge.

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