How do I get the drain plug/petcock out to drain the radiator? I want to do a coolant flush, but I can't figure out how to get the plug out of the radiator. It's a weird, white plastic plug with no tabs or ears to grab onto in order to twist it out.
What I was planning on doing was running a flush chem like prestone, then hooking up a flush adapter to the heater hose with the tstat out and run it with the water running.


99 Bravada

 

If it opens, a 1/4" ratchet head will fit inside and turn it. Still a pain to open and it takes FOREVER to drain... The Delphi replacement radiator I bought doesn't even have a drain...

I would say just pull the lower radiator hose

 

Cool, thanks for the tip. While I'm at it, I'll just go ahead and take the old one out and put one in that has a tab so it'll be easier in the future.

 

Good plan!