I just got the car it run but water came out by the engine not radiator,just put new radiator. I don't know if is the water pump.
Best thing to do......Barrow a Cooling System Pressure Tester from your local Parts Outlet. Pressurize the System without Starting the Engine and check where the leak is. HINT, your Radiator Cap tells you what Pressure your System should run. Also, pressurize the Cap as LOW Blow off Pressure raises Coolant Temp. Coupled with a Replacement Radiator and no History of it you may have a cracked Engine Block.