Update: started working on getting to the oil cooler and pressure sender. I had to remove a line that is right above the headers to get to the header nuts. Coolant came out of the line and I didn't notice any oil, though not much coolant/water came out anyway. This is inside my coolant tank
So is there oil in the tank? What's a surefire way of telling?
I have also found the source of coolant leak and I'll get a picture of where from tomorrow.