check cap , pipe leaks , water body (pump), gaskit
open the radiator cap, fill radiator completly, pull the accelator wire if u see water level going a bit down and water spining ur radiator cap is faulty if water is poping out and u can see some oil in it gaskit is gone if its ok check both pipes for leaks if they are ok ur water body is not working.
ckeck engien oil as well is there water mixed inn or not..