"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

45Ricochet wrote:

82K ain't to bad.

Ric: Based on the diagram you posted now I'm not so sure it's the water pump. I know a water pump on its way out will typically drip when the vehicle is parked, but the wet spot on the driveway is appearing to the right of the water pump location. Anything else on the front of the engine that could be a source? I did look at the thermostat housing, nothing appears wrong there. My mechanic is a 25 mile trip from me. Would it be safe to drive it to Orlando, or should it go on a hook?

82K ain't to bad.

Sounds like you are on the right track. Search YouTube for Cummins water pump replacement.