Hi People I wonder if anyone else has had this problem ? I have a 2008 2.7lt and I am losing coolant I took it to my mechanic and he said it was leaking from the back of the block but it was under warrantee so I took it to the sales company for their guys to look at. They fitted a new water pump and basically said that was the problem. I drove it home some 60 miles averaging 60-70mph no problem. It stood on my drive for 20 mins then I went 2 miles to a shop and when I returned all of the water had emptied from the cooling system. No over heating , no warning lights nothing but definitely dumping it out of the back. My mechanic seems to think it is the core plug at the back of the block but really wanted to see if anyone has encountered anything like this ?