So upon changing my oil today I see this dried coolant running down the back of the block. Can’t see any external leaks, and it looks as if it’s originating under the exhaust manifold. Both the water inlet and oil pipes look to be leak free at the manifold.

upon putting UV dye in the coolant I still cannot see any external leaks, however my oil is glowing under UV light…….

Pics are above the exhaust manifold and looking at it from below. Any ideas of anywhere else oil and coolant can mix besides the head gasket?

 

See my post in the main 1G rdx "saving a RDX from coolant leak". I suspect you are dealing with a leak at water bypass oring or a bad exhaust manifold seal. Water bypass oring is on the other side in a tight spot. I still have not tackled it but my leak is very slow now. Might pull the valve cover to do the job to give more space.