Mine got several holes after a car hit me. Cost over $1000 Australian dollars for a new one, that is literally just the radiator naked, no bolts or covers. Weird that your brother has that issue. Wonder if some acedic substance was sprayed to clean the radiator at some stage or some weird coolant.....or just simply a dogey, poor quality made radiator????
Hi there, If you are in the UK. I have used a company called radicool they are in Rochester Kent.might be worth a go.they can fix a leaking rad or even build a new one for a fraction of the cost of new.