I got the smaller check plug out by taking that 5mm allen bit (epoxy putty removed), soldering a bit of silver solder around it, hammering it into the plug, and using a socket wrench to unscrew it. The fluid that came out definitely needs to be replaced. I'll post a photo of the fluid later. Now the problem is getting the drain plug out. It, too, is stuck.


I'm having similar issues with my drain plug. Neither of them want to come out!

