Tom I remember coming across a pic you posted of your view of the harbour. From memory it looked like you live very close to my uncle but I can't find your pic again to check. Do you have the link?
I can't see the sea from our house so I suspect that pic was taken from a mates place. (We're on the southern side of Mt Kau Kau and there's another hill between us and the harbour.)
This is what we see from our lounge Dale:

And if you go over the horizon there you see these views of the harbour (depending on the time of day etc):


Is your new radiator a good match for the original? ..ie. Same no. of rows (or more) and same width/height dimensions etc?
Seems hard to imagine any blockage occuring within the pump. (I'd have thought that if debris became dislodged it would be more likely to end up on top of the tubes in your new radiator.)
