Steps to Install a Car Radiator: 1.Drain the coolantEmpty all old coolant from the cooling system completely. 2.Remove the old radiatorTake off hoses, mounting brackets and the damaged old radiator. 3.Place the new radiatorPut the new radiator into its original position and fix the brackets. 4.Reconnect all hosesAttach upper and lower coolant hoses tightly to the radiator ports. 5.Refill coolant and checkPour new coolant into the system, start the engine and check for leaks. Precautions for Car Radiator Installation: 1.Make sure the engine is completely cool before operation to avoid scalding from high-temperature coolant. .