GM Firebird 1967-1981 Repair Guide

Water Pump

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This is a centrifugal-type water pump. It is die-cast, with sealed bearings and pressed together. It is serviced as a unit.

REMOVAL & INSTALLATION



See Figures 1 through 10

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Fig. Fig. 1: To remove the water pump, first remove the fan mounting bolts ...



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Fig. Fig. 2: ... then remove the fan and spacer or fluid clutch (as applicable)



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Fig. Fig. 3: Remove the water pump drive belt pulley ...



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Fig. Fig. 4: ... then remove any accessory brackets from the water pump



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Fig. Fig. 5: Remove the power steering pump mounting bolts (if equipped) ...



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Fig. Fig. 6: ... position the pump aside ...



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Fig. Fig. 7: ... and use cord, wire or some other means to hold the pump upright (keeps it from leaking)



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Fig. Fig. 8: Detach all coolant hoses from the water pump ...



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Fig. Fig. 9: ... remove the pump mounting bolts ...



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Fig. Fig. 10: ... then pull the pump off of the engine block


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. Disconnect the battery and drain the radiator.
  2.  
  3. Loosen the generator and remove the fan belt.
  4.  
  5. Remove the power steering and air conditioning belts, if so equipped.
  6.  
  7. Remove the fan and water pump pulley.
  8.  

Viscous drive fans should not be stored horizontally. The silicone fluid can leak out of the fan assembly if it is not kept upright.

  1. Remove the front generator bracket.
  2.  
  3. Remove the heater hose and radiator hose at the pump.
  4.  

Remove the upper front timing cover and the two accessory drive housing bolts on OHC 6-cylinder engines.

  1. Remove the water pump retaining bolts and the pump.
  2.  
  3. Install the pump by reversing the removal steps. Make sure that all gasket surfaces are clean and smooth. Always use a gasket sealer on both sides of the gasket. Tighten the retaining bolts to 20 ft. lbs. on 6-cylinder engines and 15 ft. lbs. on V8 engines.
  4.  

 
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