Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Radiator and Cooling Fan

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REMOVAL & INSTALLATION



1982-90 Vehicles

See Figures 1, 2, 3 and 4



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Fig. Fig. 1: Basic engine cooling system



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Fig. Fig. 2: Radiator and cooling fan assembly-E16i engine shown



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Fig. Fig. 3: Radiator and cooling fan assembly-Except E15ET, GA16DE and SR20DE engines



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Fig. Fig. 4: Radiator and cooling fan assembly-E15ET engine

Because the cooling fan can run at any time, you should disconnect the negative battery cable for safety.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Drain the cooling system.
  4.  


CAUTION
When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. Unbolt and set aside the power steering pump if necessary to gain access. DO NOT disconnect the power steering pressure hoses or drain the system.
  2.  
  3. Disconnect the upper and lower radiator hoses, reservoir hose.
  4.  
  5. If equipped with an automatic transaxle, disconnect and cap the cooling lines at the radiator. Disconnect the water temperature switch.
  6.  
  7. Disconnect the fan motor wires and remove the fan assembly. Remove the radiator and cooling fan assembly.
  8.  

Later model vehicles also have a condenser cooling fan, which is the smaller of the two.

  1. Remove the fan motor from the shroud if the motor is defective.
  2.  

To install:
  1. Install the fan motor and blade to the shroud and tighten the bolts.
  2.  
  3. Install the radiator on the vehicle and torque the mounting bolts evenly.
  4.  
  5. Install the fan assembly and connect the fan motor electrical connectors.
  6.  
  7. If equipped with an automatic transaxle, connect the cooling lines at the radiator and connect the upper and lower hoses to the radiator and the reservoir hose.
  8.  
  9. Install the power steering pump if removed. Connect the water temperature switch.
  10.  
  11. Connect the negative (-) battery cable.
  12.  
  13. Refill the radiator and the automatic transaxle (if equipped). Operate the engine until warm and then check the water level, leaks and fan operation.
  14.  

1991-96 Vehicles

See Figures 5, 6, 7, 8, 9 and 10



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Fig. Fig. 5: Radiator and cooling fan assembly-GA16DE and SR20DE engines



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Fig. Fig. 6: Make sure the radiator and engine are cool before removing the radiator cap



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Fig. Fig. 7: Removing the overflow hose



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Fig. Fig. 8: Removing the upper radiator hose



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Fig. Fig. 9: Removing the lower radiator hose



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Fig. Fig. 10: After removing all of the retaining bolts, carefully lift radiator from the brackets

Because the cooling fan can run at any time, you should disconnect the negative battery cable for safety.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Remove the cap and drain the radiator via the drain plug in the bottom tank. Be sure to only do this when the engine is cold.
  4.  


CAUTION
When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. If necessary to gain access, unbolt and set aside the power steering pump.
  2.  

Do not disconnect the power steering pressure hoses or drain the system.

  1. Disconnect the upper and lower radiator hoses, along with the coolant overflow reservoir hose.
  2.  
  3. If necessary, disconnect the water temperature switch electrical wiring.
  4.  
  5. Disconnect the fan motor wires and remove the fan/shroud assembly.
  6.  
  7. If equipped with an automatic transaxle, disconnect and cap the A/T oil cooling lines at the radiator.
  8.  
  9. Unbolt the radiator support brackets and remove the brackets.
  10.  
  11. Remove the radiator assembly from the vehicle.
  12.  

To install:

Be sure the rubber mounting bushings are in position before the radiator is installed.

  1. Install the radiator to the vehicle.
  2.  
  3. Install radiator support brackets and tighten mounting nuts evenly.
  4.  
  5. Install the fan motor and blade to the shroud assembly. Tighten the fan shroud mounting bolts to 29-44 inch lbs. (3-5 Nm).
  6.  
  7. If equipped with an automatic transaxle, uncap and connect the A/T oil cooling lines to the radiator.
  8.  
  9. Connect the fan motor and water temperature switch electrical connectors.
  10.  
  11. Connect the upper and lower hoses to the radiator.
  12.  
  13. Connect the coolant overflow reservoir hose to the radiator.
  14.  
  15. If removed, install the power steering pump.
  16.  
  17. Refill the radiator with the proper coolant/water mixture and bleed the system.
  18.  
  19. Operate the engine until warm and then check for leaks. Check the coolant level and the fan operation.
  20.  
  21. If the A/T oil cooling lines were disconnected, check transaxle fluid level and add fluid as necessary.
  22.  

 
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