hi all for a few weeks my car has been losing a bit of coolent and just wondering if there is anything common i should look for like rad or waterpump leaking its using about half the expansion tank every 500 - 600 miles now i know that is alot of water oh i have got a 1.6fsi engine does this engine suffer with the same problems as the 2.0tdi for the heads being shot or could it be something simple as there's no sign of any water leaking ie no water on my drive etc.. help please