Radiator drain?

[CW_racefan]

I have a 2000 S-10, 4.3l that I need to do a cooling system flush on. Problem is I can't figure out the drain cock on the radiator. It isn't the usual wing type, but looks like some sort of weird one way screw head. I can't seem to get it to move. Any suggestions?

Thanks!
Craig

[mrmikey]

Flushed mine, '01 4.3 S-10, a couple of months back and I garee the drain is a pia, what is wrong with the good 'ole wing nut.
Anyway what I ended up using was a big phillips screwdriver, you could use a large slotted but I happened to have a philips. As far as collecting the old af, that's a pia too.
I got rid of the dexcool, rinsed it a couple of times and refilled with regular Prestone. One caution, I mixed my coolant 50/50, mix it a bit stiffer say 60/40, my freezing point was only -20°. Apparently there's more coolant retained in the system that I thought....Mike

[CW_racefan]

So you really do just keep twisting on it and it will open? I had a flat blade screw driver in the center of it and couldn't get it to open.

Thanks!
Craig

[Blue Bowtie]

You could just remove the lower hose...

[mrmikey]

So you really do just keep twisting on it and it will open?

Yep, that's all I did, the actual center didn't come out totally it just moved out....1/4" or so, not much really.
Just be careful it's not seized in there, I wouldn't want to see you bust off the fitting, (damn plastic rads).
I thought about remoing the lower hose as was suggested but, and I'm going from memory here, I think it was harder to get to......Mike

[CW_racefan]

Yep, hose is no easier to get to, and its above the drain plug so won't drain as much. That's my fallback if I can't get the plug open.