The Ford F-350 7.3L: A Heavy-Duty Pickup Truck Known for Its Power and Towing Capacity The Ford F-350 7.3L  Ford F-350 with a 7.3L engine is a heavy-duty pickup truck known for its power and towing capacity. The coolant tank, also known as the radiator overflow tank or coolant reservoir,... The Ford F-350 7.3L: A Heavy-Duty Pickup Truck Known for Its Power and Towing Capacity The Ford F-350 7.3L  Ford F-350 with a 7.3L engine is a heavy-duty pickup truck known for its power and towing capacity. The coolant tank, also known as the radiator overflow tank or coolant reservoir,...