Coolant leak?

Joined
Jun 8, 2016
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Location
Texas, USA
Hey guys, for the last couple of days after arriving home I'm get the slight smell of coolant as I walk past the front of the car. Finally did some poking around and found a greasy area under what looks like a coolant tube around the thermostat housing area. This looks like it carries coolant to or from the heads, but I'm not real familiar with it. Anybody ever seen this on their Ford 3.7?

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Pressure test the cooling system, clean the engine and inspect. An oily residue likely isn't the source of a coolant smell. Look at hose connections and the weep hole of the water pump.
 
Dug around and looked deeper with my inspection camera. The dirty, oily stains are from a weeping timing cover gasket at the top of the engine. Can't see the pump's weep hole because of the pulley, but all visible surfaces of the water pump are dry. I am truly stumped as to where the coolant smell is coming from. No drips or wetness anywhere. My only suspect is the black plastic pipe in the pictures, and whatever it leads to. The coolant smell is strongest in that area when I put my nose there.

Is that pipe carrying coolant to the intake manifold?
 
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