First, I attached two pics. The first has three areas numbered. The second is highlighted.
There are really one of three places it can be leaking, the thermostat housing, the drain, or the engine block is cracked. Take a look at the attached pic and let me know if number 3 is where you see a leak. Is the highlighted area where you see coolant? If so, reconfirm the t-stat housing isn't leaking down. If it is the actual engine block that is cracked, you will need to have it welded. When welding aluminum, a TIG welder is used.
The timing chain cover is there as well as the water pump. There is no coolant running through the cover. If at all possible, take a pic of your vehicle. I need to see exactly where you are referring to be sure. Also, is there any chance there was water in the system and it froze?
Images (Click to enlarge)
Tuesday, December 3rd, 2019 AT 6:26 PM