Im sure the hyundaiTech in here, will know.  I highly recommend you buy
a Prestone Flush Kit with Cooling System Cleaner , as this does a superb
job at cleaning the entire cooling system passages and radiator. The
directions are easy to follow on the package, and, you can reuse the Kit
since it stay on your engine hose.

There is no bleed point.  I typically let the car run until the fan cycles
once.  This usually burps out anything.  If I can't actually see the
coolant circulating, I also check the radiator hoses to be sure they're
both hot.