LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnostic Information and Procedures >> Thermostat Diagnosis

Thermostat Diagnosis

    Fig 1: Inspecting Thermostat
    GM2015721Courtesy of GENERAL MOTORS CORP.
  1. Inspect the thermostat.
  2. The valve opening temperature is inscribed on the thermostat.
    3. Fig 2: Immersing Thermostat In Water
    GM2015722Courtesy of GENERAL MOTORS CORP.
  3. Immerse the thermostat in water, and then gradually heat the water.
  4. Inspect the standard valve opening temperature of the thermostat.

    Standard Valve Opening Temperature: 80 to 84°C (176 to 183°F)

    If the valve opening temperature is not as specified, replace the thermostat.

    5. Fig 3: Inspecting Standard Valve Lift
    GM2015724Courtesy of GENERAL MOTORS CORP.
  5. Inspect the standard valve lift is 10 mm (0.394 in) or more at 95°C (203°F).

    If the valve lift is not as specified, replace the thermostat.

  6. Inspect that the valve is fully closed when the thermostat is at low temperatures, below 77°C (171°F).

    If it is not fully closed, replace the thermostat.

scientia non olet · About LEMON Manuals