In the 2000 miles I've had my 2010 HSE, I've had to add coolant a couple of times. I'd say about 2 quarts total. It recently got a new water pump prior to my ownership. At first I was assuming it was never topped off sufficiently or bled out enough. Now I'm thinking otherwise. No visible signs of leaking anywhere. No smell. Is there a common situation where the loss may be occurring from that anyone might recommend I check?