Diesel Leak

[raptordude]

I have a few drops of diesel on the floor of my garage after a cold start. I looked all in and around my engine but I cannot find the leak. There is some residue on the passenger side of the engine but it looks old. Any help?

[outlawdiesel]

GET A CLEAN RAG AND WIPE THE FEED LINE THAT GO IN THE FRAME.YOU SHOULD FIND IT THERE.THE CAP GASKET LEAK AT TIMES TOO

[Diesel_Diagnostician]

Make sure all fuel filter lids are tight (not too tight though just to torque) and can you give us an idea where on the floor in relation to the truck the diesel drips are so we can better help you in your diagnosis.

[raptordude]

Its coming off the pan but I can't follow it up high enough to see it. Its coming from the back side of the engine under all the tight areas like the turbo and such. I'll get a very bright light and stick my head in there again.
So far I can tell it is not:
fuel line, filter, filter cap or water filter.

Can one of the injectors leak?

[Diesel_Diagnostician]

No, the injectors can't leak externally.

[raptordude]

Update to the post. It is not diesel as it dripped in my face and smells like antifreeze. Coming from the back side of the engine right side.
Heres the tricky part, it only leaks in the morning when I turn on the key to warm the glow plugs. No other drips all day. Tell me how that is happening?