If the water is clean that'll be the condensate drain from the air con. It just shows the air con is working properly. I'd be more concerned if it wasn't dripping in this weather. I assume D22s had air con?

 

cheers for that mate sounds about right

 

If its coming from the pipe next to the dipstick then it will be from the radiator expansion tank. It will leave a coolant coloured residue when dry. And it will only leak when you come to the end of your journey. Happened to me not so long back. Nothing serious, you just need to take the rubber pipe off give the metal pipe a clean then put it back together but use a jubilee clip instead of the clip already there :thumbright: