[LiveFreeOrDie]

Hello,

I have a steam radiator that is always cold, and I'm guessing it's the air valves. Problem is I can't get the existing top plug air vent out to clean it, and I can't get the small middle slot screw out to install a new angle vent. Any thoughts on how to move forward before I start drilling and extracting things?

Sorry for the very small picture.

Thanks for any help!

John