Economy Engine Coolant Thermostat (13006) by Stant®. Without Check Valves and Seal. Temperature: 160F. Get fast engine warm-up and dependable engine operating temperature with a Stant thermostat. Stant’s exclusive ELAC® Thermostat Cutaway heat motor has a uniquely formulated thermally expansive wax fill that is precisely calibrated for consistent and precise thermostat valve response.