Volvo 240/740/760/780/940/960 1990-1998

Thermostat

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REMOVAL & INSTALLATION



See Figures 1, 2 and 3

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a suitable container.
  4.  
  5. Disconnect the coolant hose attached to the thermostat housing.
  6.  
  7. Remove the thermostat housing retaining bolts.
  8.  
  9. Remove the thermostat housing, thermostat and gasket. Some thermostats require alignment with certain marks or are clocked (only fit in the housing a certain way), so be sure to pay close attention while removing.
  10.  

To install:
  1. Before installing the thermostat, thoroughly clean the mating surfaces.
  2.  
  3. Fit a new gasket and place the thermostat into position.
  4.  
  5. Install the thermostat housing and tighten bolts to proper torque (refer to torque specifications in the back of this section).
  6.  
  7. Fill the cooling system through the expansion tank.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Start the engine and allow to reach normal operating temperature.
  12.  
  13. Bleed the cooling system.
  14.  
  15. Top up with coolant and check for leaks.
  16.  



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Fig. Fig. 1: Remove the radiator hose



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Fig. Fig. 2: Unfasten the retaining bolts and remove the thermostat housing



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Fig. Fig. 3: Remove the thermostat from the engine

 
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