[A4] Coolant Leak

[Brian Powell]

Greetings, my wife has a 96 A4 with AFC (12v V6) engine at 100k miles.
The radiator began to leak between the plastic end tanks and aluminum
core. I replaced the radiator about 3 weeks, but now, every morning
there is a small puddle of coolant below the car. I have tried and
tried to find the source of this. It drips off of the bottom of the
oil pan on the passenger side. All hoses seem secure. I fear it may be
a leaking head-gasket; however, the engine warms up properly to 90 +/-
5 deg C, and there does not appear to be any coolant in the oil (or
vice versa). Plus, if it were a head gasket leak, I wouldn't think it
would leave 2 teaspoons of water on the floor in the morning.

The problem is that I can't find where it would be coming from. On the
passenger side of the engine, there aren't any coolant lines (the
thermostat housing is in the front, passenger side, and a line that
goes to the expansion tank and a line to the bottom of the radiator).
Using the flashlight, I could not find anything that seems wet (other
than the bottom of the oil pan), until I shined behind the alternator,
the side of the block was wet.

Any suggestions?

Cheers,
Brian