The Volvo Has Rodknock... Or Maybe Not... (Patreon)

Well this is not how I expected today to go.... Spent most of it in the office getting sponsorships lined up to help get this thing into the 10's! 

Around 7PM I drove it 10 minutes to Home Depot to get some supplies to build an archery target. I noticed the noise a few minutes into the drive. At first I thought it was something with the power steering pump (its been making other noises recently). But by the time I got home the sound was much worst. Oil pressure was totally fine. Engine felt totally fine. But that noise is totally not fine.

I took off the valve covers and inspected the valve train: everything looked good there. Is there anything else that could cause this noise besides rodknock? :(