GM Firebird 1982-1992 Repair Guide

Thermostat

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REMOVAL & INSTALLATION




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

Except 3.8L Turbo

See Figures 1, 2 and 3



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Fig. Fig. 1: Removing the thermostat housing bolts



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Fig. Fig. 2: Removing the thermostat housing



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Fig. Fig. 3: Removing the thermostat

  1. Disconnect the negative battery cable.
  2.  
  3. Remove any components necessary to gain access to the thermostat.
  4.  
  5. Drain the cooling system to below the level of the thermostat.
  6.  

It is not necessary to remove the radiator hose from the thermostat housing.

  1. Remove the two retaining bolts from the thermostat housing and remove the thermostat.
  2.  

To install:
  1. Using a new gasket, install the thermostat and housing.
  2.  
  3. Tighten the bolts to 21 ft lbs. (28 Nm).
  4.  
  5. Fill and bleed the cooling system.
  6.  

3.8L Turbo

  1. Disconnect the negative battery cable.
  2.  
  3. Remove any components necessary to gain access to the thermostat.
  4.  
  5. Drain the cooling system to below a point the level of the thermostat.
  6.  
  7. Remove the nut from the radiator hose support bracket.
  8.  
  9. Remove the thermostat housing attaching bolt and clamp.
  10.  
  11. Remove the thermostat housing, O-ring and thermostat. Discard the O-ring.
  12.  

To install:
  1. Install the thermostat.
  2.  
  3. Install the housing with a new O-ring.
  4.  
  5. Install the housing clamp and bolt. Tighten to 13 ft lbs. (18 Nm).
  6.  
  7. Install the radiator hose support bracket and nut.
  8.  
  9. Fill and bleed the cooling system.
  10.  

 
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