well i have gone through 7 radiators with a 1.3 bar cap and have now got a alloy radiator. So i believe that they are not as good for your radiator . never broke a hose though 8)
i have exactly same prob. be carefull as it actually puts 12v into temp in and holds your 5v out at around 5.6v and will make your map sensor read low. i used the temp sensor beside the one you are using currently and made up a cal table for it. the g4 needs a resistance not a voltage