Well I've just had some serious overheating since yesterday. After discovering my radiator was EMPTY (I've been away for a couple of weeks) it looks like I've got a problem with my water pump. There's coolant leaking from it which sounds like the seal to me, but I also had a whining sound for a bit which last time I had one of those turned out to be worn bearings on a drive shaft - so I'm thinking maybe both these things have happened and I need to get a new water pump?
As you can tell, I know absolutely nothing about engines :) But it seems like a job I might be able to take on myself... amirite?