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Home >> Suzuki >> 2007 >> SX4 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Engine Cooling System) >> Diagnostic Information and Procedures >> Thermostat Test
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Thermostat Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Suzuki Reno, 2008 Suzuki Forenza, 2007 Suzuki Reno, 2007 Suzuki Forenza, and 2006 Suzuki Reno. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the thermostat from the vehicle. Refer to Thermostat Removal and Installation .
  2. Make sure the valve spring is tight when the thermostat is fully closed. If the spring is not tight, replace the thermostat.
  3. Suspend the thermostat and a thermometer in a pan of 50/50 mixture of ethylene glycol and water. Do not let the thermostat or the thermometer rest on the bottom of the pan because the uneven concentration of heat on the bottom could result in inaccurate temperature measurements.
  4. Heat the pan on a burner.
  5. Use the thermometer to measure the temperature of the heated solution.
  6. The thermostat should begin to open at 87 °C (189 °F) and it should be fully open at 102 °C (216 °F). If it does not open at these temperatures, replace the thermostat.
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