Kia_Sephia_Rio_Spectra_Optima_1998-2006

Thermostat

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Removal & Installation



1.5L, 1.6L, 1.8L & 2.0L Engines
  1. Drain the coolant to a level below the thermostat.
  2.  
  3. Remove the water inlet fitting, gasket and thermostat.
  4.  
  5. Clean the gasket mating surfaces.

    Click image to see an enlarged view

    Fig. Exploded view of the thermostat-1.5L engine shown, 1.8L similar



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    Fig. Exploded view of the thermostat-1.6L engine



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    Fig. Water inlet fitting (A) and thermostat-2.0L engine

  6.  

To install:

  1. Place the thermostat in the housing with the jiggle valve facing upward. Install a new thermostat gasket.

    Click image to see an enlarged view

    Fig. Use a new gasket (A) when installing the thermostat (B)-2.0L engine shown

  2.  
  3. Install the water inlet fitting and tighten to 14-19 ft. lbs. (19-26 Nm) for 1.5L, 1.6L and 1.8L engines, or to 11-15 ft. lbs. (15-20 Nm) for 2.0L engines.
  4.  
  5. Fill the engine with coolant, then start the engine and check for leaks.
  6.  

2.4L & 2.7L Engines
  1. Drain the coolant to a level below the thermostat.
  2.  
  3. Remove the engine coolant outlet fitting and gasket.
  4.  
  5. Remove the thermostat.
  6.  
  7. Clean the gasket mating surfaces.

    Click image to see an enlarged view

    Fig. Thermostat mounting-2.4L engine

  8.  

To install:

  1. Install the thermostat. Make sure that the flange of the thermostat is correctly seated in the socket of the thermostat housing. If the thermostat is installed in the wrong direction, the bottom of the thermostat will touch the rib inside the intake manifold, making it impossible to seat flange in position
  2.  
  3. Install a new gasket and the engine coolant outlet fitting. Tighten the fitting bolt to 7-11 ft. lbs. (10-15 Nm) for 2.4L engines or to 12-14 ft. lbs. (17-20 Nm) for 2.7L engines.
  4.  
  5. Fill the engine with coolant, then start the engine and check for leaks.
  6.  

 
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