1999 Mercury Marquis

Engine Cooling problem
1999 Mercury Marquis V8 Two Wheel Drive Automatic 142000 miles

My car has a coolant leak and I have to keep adding coolant every 200-300 miles. Recently me and my Dad replaced the alternator and noticed behind the alternator a small puddle of coolant. It appears to be possibly a heater hose but were not a 100%, with the configuration of the engine its really hard to get to where the hose and leak is. If so how do you replace it and not have to disconnect or remove major parts? If not what could be the problem? Thanks for the help.
October 23, 2010.

I would need the 8th digit of your VIN to verify the engine but if I have the correct diagram, your vehicle's water pump is just underneath the alternator, it's likely that the water pump is weaping coolant and needs replaced.

Oct 23, 2010.