[svxistentialist]

Sorry to hear about your problems.

Don't turn over the engine too much if the rad is dry. If the pump is still working, it will pump the block dry and damage the heads, no matter what the gauge says.

Take off the guard underneath the radiator. Pour some water into the rad [no point in wasting precious coolant] and see where it is coming out. You may be right about the water pump, the heater core gone would probably wet the interior of the car. I think the radiator core sides are plastic, so you could have a split there either.

If it's the pump, a good bit of work is involved. The cam belt has to come off, so you need to watch setting the timing on replacement. Depending on mileage, you might consider replacing the oil pump while in there, as the labour will be a high proportion of the total cost of the job. You'll probably also replace the belt, I would.

In terms of disruption, it will be easiest for you if it is a hose split, or even the rad has split.

Best of luck with it.

Joe