[fiveohpatrol]

You need to check for oil in the water, and/or coolant in the oil.

It also could be just your heater hoses at the firewall, they are the 2 fairly short hoses that go down behind the throttle body area and connect to the black heater lines there. If you have a leak there, then be VERY careful when replacing those lines because they are connected to the heatercore (the 2 lines sticking out the firewall) and they can break very easily.

Next thing I suggest doing is going to autozone and renting their cooling system pressure tester. You hook it to where your radiator cap goes (with the engine off), pump it to 16psi or so, and this way you can listen and look for leaks without the coolant being hot, and no moving engine parts to rip your fingers off.

They rent tools like this for a fully returned deposit, and this one is very useful in times like this.

do this next, and let us know where its coming from

good luck