"The objectives of diesel engine coolant filters, also known as water filters, are to remove contaminants from the engine cooling system and add chemicals to the coolant itself to replenish important protectants that may be lost over time. Baldwin Filters’ coolant spin-on filters with Balanced Treatment for Ethylene Glycol (BTE) formula are designed to protect the engine and enhance its performance. BTE formula coolants offer a combination of low-silicate antifreeze and water, which removes heat and lubricates the water pump. They provide freeze protection and prevent scale-sludge formation.