Just noticed this the other day. I was sitting at a gas station waiting for a friend. When I started up my engine I got this weird sucking fluid/draining noise coming from the front. Thought nothing of it but its been doing it more frequently when I start up but after a minute or two it goes away. Any ideas what it could be??

 

Did you open the hood and listen to see where it's coming from? It can be a number of things. Where does it sound like it's coming from? Start by checking the vacuum lines also look around and see if it's not a cooling system leak.