Pontiac Fiero 1984-1988 Repair Guide

Oil Pump

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REMOVAL & INSTALLATION



2.5L L4 Engine
1984-86 MODELS


Click image to see an enlarged view

Fig. Fig. 1 Oil pump and driveshaft components-four-cylinder engine


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the oil pan as described in the Oil Pan removal procedures.
  2.  
  3. Remove the two flange mounting bolts and the nut from the main bearing cap bolt.
  4.  
  5. Remove the pump and screen as an assembly.
  6.  

To install:

  1. Align the pump shaft with the driveshaft tang. Torque the pump retaining bolts 20 ft. lbs. (27 Nm). Install the oil pan as previously shown.
  2.  

1987-88 MODELS

1987-88 4-cylinder engines incorporate a force balance into the oil pump. The force balancer assembly does NOT have to be removed to service the oil pump or pressure regulator assemblies.


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Drain the crankcase oil and remove the oil pan and filter as outlined in the Oil Pan removal procedures in this section.
  2.  
  3. Remove the restrictor, oil pump cover, oil pump gears and pressure regulator valve.
  4.  


CAUTION
The pressure regulator valve spring is under pressure. Use care when unscrewing the plug, or removing the pin.

To install:

  1. Clean all sludge, oil and varnish from the pump assembly with carburetor cleaner or equivalent.
  2.  
  3. Lubricate all parts with engine oil.
  4.  


WARNING
To avoid engine damage, all pump cavities must be packed with petroleum jelly BEFORE installing the gears to ensure priming.

  1. Install the pump gears, pump cover and pressure regulator. Torque the pump cover bolts to 7 ft. lbs. (10 Nm).
  2.  
  3. Install the plug and pin and make sure the pin is properly seated.
  4.  
  5. Clean and install the oil pump inlet screen, oil pan and new filter. Torque the oil pan bolts to 20 ft. lbs. (27 Nm).
  6.  
  7. Refill the crankcase with the specified engine oil. Start the engine and check for oil pressure and leaks.
  8.  

6-2.8L Engine


Click image to see an enlarged view

Fig. Fig. 2 Oil pump components-V6 engine


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Drain the crankcase and remove the oil pan as outlined in the Oil Pan removal procedures in this section.
  4.  
  5. Remove the flywheel shield or clutch housing cover.
  6.  
  7. Remove the starter motor.
  8.  
  9. Remove the oil pan as outlined in the Oil Pan removal procedures in this section.
  10.  
  11. Remove the pump and driveshaft extension.
  12.  

To install:

  1. Engage the driveshaft extension in the cover end of the distributor drive gear.
  2.  
  3. Install the pump-to-rear bearing cap bolt and torque to 26-35 ft. lbs. (35-47 Nm).
  4.  
  5. Install the oil pan as outlined in the Oil Pan section and refill with engine oil. Start the engine and check for oil leaks.
  6.  

 
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