I just had a simular prob. was getting a small oil leak that traveled down the back of my engine
into the flywhell cover onto the starter when I found this I also found a small trail of coolant leading down to the same area. I changed my intake Manifold gasket and the Problem is solved.
The hose your asking about is it a coolant hose or Vacuum hose. Your (2) heater hoses will run from the firewall to (1) water pump (2) top of intake Front of Engine There are (2) Vacuum hoses
on the backside (1) to the Brake booster (1) into the back side of the intake Mine is a 95 so you may have a different setup

 

don't know which side the temperature sending unit is on, on the newer models but look to see if it somehow got loose. (the infamous mechaninc that worked on my truck didn't screw it in all the way)