ive had my koyo rad for six months now, went to change my pullies and my clumsy *** hit the radiator with my wrench on one of those thin fins that go up and down the radiator got a small cut, is it possible to try to braze it with a aluminum rod and not leak

 

if you punctured it, i'd bring it to a radiator shop or to someone who knows hows to work with aluminum to fix it. Aluminum is tough to work with especially when it comes to heat.

 

^ truth