Right,

So I had a crack in my coolant reservoir for my water / air last weekend. Changed it today, filled it with coolant and started the car - and nothing. The coolant wasn't circulating at all. The previous owner said it may have been an air lock so drove the car for 10 mins in the hope that it would free it up but still nothing. I shone a light behind the plastic inlet / outlet pipes on the pump and it does seem like the coolant is getting to / from it as I saw the green tinge of the coolant in the pipes.

I think the pump may be dead.

Anything else I could try?

What pump should I get if I need one?

Thanks guys.