Eclipse V6-30L SOHC (2003) Thermostat, Engine Cooling: Component Information - TSB Page 1600
1. Immerse the thermostat in water, and heat the water while stirring. Check the thermostat valve opening temperature.
Standard value: 88 ± 1.5° C (190 ± 3° F)
2. Check that the amount of valve lift is at the standard value when the water is at the full-opening temperature.
NOTE: Measure the valve height when the thermostat is fully closed, and use this measurement to compare the valve height when the
thermostat is fully open.
Standard value