Clogged radiator

Have you tried using a pick to poke the hole? If it doesn’t work, i’d disconnect the lower radiator hose at the radiator and flush it out that way.

You might be able to poke gently in the hole with an object if the drain plug is off. If it has a top cap vs. just an overflow tank you could siphon the coolant out. Sometimes there is so much scale build up your better off putting a new radiator in.

Agree. Take the plug out and clear it with a small screw driver or piece of wire. The sediment will be soft and easily cleared out of the opening.

I’m disconnected one hose to the rad at a time and taping a shop vac hose around it , and putting the hose on blower mode . Might get a little messy but if it’s sealed enough and you can hit the drain plug with a hose or taped vacuum hose, you’ll more than likely start clearing a lot of stuff out of there. Mine looks like rocks and dirt. Having tough time but figuring out the car!