Coolant in cylinder 8 on 318

Do a cylinder leak down test just put air in cylinder with valves closed ,you can level engine and fill block with water and look for bubbles coming from water jacket with intake off ,on another note make sure your intake bolts are not to long and bottom out in the end holes they may feel tight will bottom out and NOT compress the gasket
Reassembling far enough to do a leak down test is probably the best next step if I cannot visibly find anything.

Intake was well sealed, and coolant was definitely not coming from intake side. Intake runner was bone dry.