Water pump lubricant additives, any benefit? BobIsTheOilGuy Camco Antifreeze Hand Pump Kit 36003 Defender Marine This diagram illustrates the Water Pump Mechanism in an automotive cooling system, explaining how coolant circulates to manage engine temperature. Coolant Flow: The water pump draws cool coolant from the radiator and NorthStar Pressure Washer Pump Antifreeze Lubricant, 4 Oz., Protects to 25F, Lubricates Pistons, Seals, Valves Northern Tool Rymax Lubricants What is a coolant? The image illustrates the differences between a properly functioning and a leaking water pump, emphasizing the condition of the seal and gasket. A good water pump has a clean, properly sealed gasket