Removed the entire radiator and sand down the leaking area.
did a pressure test on the radiator,
(best way to do it at home is in the bathroom, covering all the hole, leaving only one access to the radiator, stick a hose in, and see where the water shoots out from..)
and there were 6 holes!
after i sand down the area and dried it, i apply 2 layer of epoxy (steel Hard), common known as JB weld. leaving for 1hr to dry, then i did a pressure test again. once i confirm that there was no where else leaking, i resprayed the radiator to give it a new look and left it over for the epoxy to fully settle in. fixed everything back, and now my radiator is working great.
This method works great for hairline crack, small holes and etc. just thought i share.
Edited by gilbert, 21 November 2008 - 01:43 am.