Engine Coolant Thermostat and Housing Assembly (14659) by Stant®. Quantity: 2 Bolt Hole. Temperature: 187F. 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.