"Mystery" Puddle

that's all you have up front either water pump or front seal. unless its the fluid leaking out of the fan clutch. water pump very easy to change I can do one in about 1/2 hour . oil leak don't tryunless your sure you know what your doing ... wait just thought of something up on front cover as looking at engine front to rear there is a round plastic cover/plug should have a spot for a 3/8 ratchet in the center, that is for acess to your injection pump this just screws our and has a oring around it. seal failed or loose, cant hurt anything by taking it off, just DONT touch the nut behind it that holds the injection pump gear on.

I would check all but sounds like fan clutch as it has a viscos fluid in it should be no side to side movement