This engine coolant thermostat from Stant is designed for use with diesel engines, and has a manufacturer part number of 13779. It is an essential component for the proper functioning of your vehicle's engine cooling system, and is made to high standards to ensure reliable and long-lasting performance. With this thermostat, you can be confident that your engine will stay cool and run smoothly, even in the hottest of temperatures. It is compatible with a wide range of vehicles, and is easy to install and maintain. So why wait? Upgrade your engine cooling system today with this top-quality Stant thermostat!