GM Grand Am/Achieva/Calais/Skylark/Somerset 1985-98

Engine Fan

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REMOVAL & INSTALLATION



See Figure 1


CAUTION
Keep hands, tools and clothing away from the engine cooling fan to help prevent personal injury. The fan is electric and can come on automatically even when the engine is off. After replacing the fan, make sure that the fan is circulating the air in the proper direction.



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Fig. Fig. 1: Cooling fan mounting and insulator location-1994-98 models

Except 2.3L, 2.4L and 3.1L Engines See Figures 2 through 7

  1. Disconnect the negative battery cable.
  2.  
  3. Partially drain the cooling system, then remove the top radiator hose, if necessary for fan removal.
  4.  
  5. If necessary for access, remove the air cleaner assembly.
  6.  



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Fig. Fig. 2: Disengage the mass air flow sensor electrical connector



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Fig. Fig. 3: Remove the plastic shrouding retaining the air cleaner assembly



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Fig. Fig. 4: Unfasten the air cleaner assembly mounting bolts, then ...



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Fig. Fig. 5: ... remove the air cleaner assembly for access to the fan

  1. Disconnect the wiring harness from the motor and from the fan frame.
  2.  
  3. If necessary, remove the fan guard and hose support if necessary.
  4.  
  5. Unfasten the retaining bolts, then remove the fan assembly from the radiator support.
  6.  



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Fig. Fig. 6: Unfasten the fan retaining bolts, then ...



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Fig. Fig. 7: ... carefully lift the cooling fan assembly from the engine compartment

  1. Installation is the reverse of the removal procedure.
  2.  

2.3L Engine See Figure 8

1988-91 MODELS
  1. Disconnect the negative battery cable.
  2.  
  3. Unfasten the air cleaner to the throttle body duct.
  4.  
  5. Detach the TPS, IAC, and MAP sensor connectors and position the harness off to the side.
  6.  
  7. Disconnect the vacuum harness assembly from the throttle body and place to the side.
  8.  
  9. Detach the MAP sensor vacuum hose from the intake manifold.
  10.  
  11. Unfasten the coolant fan shroud bolts and remove the fan shroud.
  12.  
  13. Remove the coolant fan to upper radiator support bolt and remove the upper radiator support.
  14.  
  15. Detach the electrical connector from the coolant fan.
  16.  
  17. Lift the fan out from the lower insulators. Rotate the bracket so that the two lower legs point upward.
  18.  
  19. Move the fan to the driver's side to ensure proper clearance and remove the fan out the top.
  20.  



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Fig. Fig. 8: Common view of the fan mounting-2.3L engine

To install:
  1. Install the fan assembly with the two lower legs pointing upward.
  2.  
  3. Rotate the fan, then place the two lower legs into the insulators.
  4.  
  5. Attach the electrical connector to the fan and install the upper radiator support.
  6.  
  7. Install the coolant fan shroud, then install the coolant fan-to-upper radiator support mounting bolt.
  8.  
  9. Fasten the MAP sensor vacuum hose to the intake manifold.
  10.  
  11. Attach the electrical connectors to the TPS, IAC, and MAP sensor.
  12.  
  13. Connect the vacuum harness to the throttle body.
  14.  
  15. Install the air cleaner-to-throttle body duct.
  16.  
  17. Connect the negative battery cable.
  18.  

1992-93 MODELS
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air intake duct assembly.
  4.  
  5. Unfasten the cooling fan mounting bolt.
  6.  
  7. Disengage the cooling fan electrical connector.
  8.  
  9. Remove the cooling fan assembly from the bottom of the vehicle.
  10.  

To install:
  1. Install the cooling fan through the bottom of the vehicle.
  2.  
  3. Engage the fan electrical connector.
  4.  
  5. Install the fan mounting bolt.
  6.  
  7. Connect the air intake duct assembly.
  8.  
  9. Connect the negative battery cable.
  10.  

1994-95 MODELS
  1. Disconnect the negative battery cable.
  2.  
  3. Raise the vehicle enough to remove the front wheel and tire assembly.
  4.  
  5. Remove the bolt from the lower torque axis mount.
  6.  
  7. Unfasten the fan mounting bolt, then detach the electrical connector.
  8.  
  9. Rock the engine rearward, then remove the fan assembly.
  10.  

To install:
  1. Rock the engine rearward, then install the fan assembly. Secure with the mounting bolt, then attach the electrical connector.
  2.  
  3. Install the bolt to the lower axis mount.
  4.  
  5. Install the right wheel and tire assembly, then safely lower the vehicle.
  6.  
  7. Connect the negative battery cable.
  8.  

2.4L and 3.1L Engines

1994-95 MODELS
  1. Properly drain the cooling system.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the coolant fan bracket bolt.
  6.  
  7. Detach the electrical connector from the fan.
  8.  
  9. Disconnect the radiator inlet hose from the radiator.
  10.  
  11. Remove the radiator mounting bolt.
  12.  
  13. Pull the windshield washer fluid bottle fill tube from the bottle.
  14.  
  15. Remove the vacuum tank.
  16.  
  17. Remove the vacuum tank bracket.
  18.  
  19. Remove the cooling fan by sliding the fan leg into an area left from the vacuum tank.
  20.  

To install:
  1. Install the coolant fan assembly.
  2.  
  3. Fasten the vacuum tank bracket, then install the vacuum tank.
  4.  
  5. Install the windshield washer fluid bottle fill tube.
  6.  
  7. Install the radiator mounting bolt.
  8.  
  9. Connect the radiator inlet hose to the radiator.
  10.  
  11. Attach the electrical connector to coolant fan.
  12.  
  13. Install the cooling fan mounting bolt.
  14.  
  15. Attach the air intake duct assembly.
  16.  
  17. Connect the negative battery cable.
  18.  
  19. Start the vehicle and check the operation of the fan.
  20.  

1996-98 MODELS
  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the electrical wiring for the electric fan.
  4.  
  5. Unbolt and remove the cooling fan assembly.
  6.  
  7. Inspect the insulator and replace as needed.
  8.  

The insulator is located in the upper portion of the fan blade assembly. Refer to the illustration.

To install:
  1. Position the fan assembly on the radiator.
  2.  
  3. Secure the fan and tighten the retaining bolts to 97 inch lbs. (11 Nm).
  4.  
  5. Connect the negative battery cable. Start the vehicle and check for operation.
  6.  

TESTING



When diagnosing an inoperative cooling fan it may be necessary to use a diagnostic scan tool to monitor engine coolant temperature and the engine control computer.

  1. Perform a visual inspection of the cooling fan. If the fan does not turn with ease, the fan motor is seized and needs to be replaced.
  2.  
  3. Check all the fuses and fusible links related to the cooling fan circuit.
  4.  
  5. Check the integrity of the electrical connections related to the cooling fan circuit.
  6.  
  7. Check the cooling fan motor.
  8.  
  9. Check the relays associated with the cooling fan circuit.
  10.  
  11. Using a scan tool, determine if the engine control computer is calling for the fan to activate.
  12.  

Cooling Fan Motor

  1. Disconnect the negative battery cable.
  2.  
  3. Disengage the cooling fan motor connector.
  4.  
  5. Identify and label the ground and the power terminals of the cooling fan connector using the wiring diagrams provided.
  6.  
  7. Using jumper leads with a fuse in series, apply battery voltage to the appropriate terminals of the cooling fan.
  8.  
  9. The cooling fan should operate. If not, replace the cooling fan.
  10.  

If the cooling fan functions properly during this test, proceed to the cooling fan relay test.

Cooling Fan Relay See Figure 9

  1. Turn the ignition OFF .
  2.  
  3. Remove the relay.
  4.  
  5. Locate the two terminals on the relay, which are connected to the coil windings. Check the relay coil for continuity. Connect the common meter lead to terminal 85 and positive meter lead to terminal 86. There should be continuity. If not, replace the relay.
  6.  



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Fig. Fig. 9: Use an ohmmeter to check for circuit continuity of the coil in the relay

  1. Check the operation of the internal relay contacts.
    1. Connect the meter leads to terminals 30 and 87. Meter polarity does not matter for this step.
    2.  
    3. Apply positive battery voltage to terminal 86 and ground to terminal 85. The relay should click as the contacts are drawn toward the coil and the meter should indicate continuity. Replace the relay if your results are different.
    4.  

  2.  

If the relay functions properly during this test, inspect the coolant temperature sensor and the cooling fan system wiring for defects.



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Fig. Fig. 10: Terminal identification of the most common types of relays. Diodes and resistors in the relay prevent voltage spikes induced when the current is removed from the coil from damaging electronic components

 
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