hole in cooling system

[The_RSi_Guy]

basically guys im not very technically knowledge when it comes to cars, i have a hole in one of the metal pipes that serves the radiator and it goes under the engine block and i think it goes into the water feed thingy. basically wanted i wanted to ask was if anyone knows how to repair a hole in a pressureised system without welding or if anyone has a workshop manual or a parts catalougue for a clio 1.8 rsi 1996 that i can use to find out the part number to order another one?

thanks
​mike