Hello, all. I'm changing the coolant on my '98 T100. My service manual shows 2 drain plugs, one on the radiator and one pointing somewhere on the engine (the graphic is bad). I don't see the 2nd. I drained the radiator at the bottom with the cap off, but it was still dripping after an hour. I shut it off and proceeded to fill with a flush, but it wouldn't take nearly as much water as came out, so there must be quite a bit of air in the system. I ran the engine for about 8-10 minutes at idle hoping that the thermostat would open and flush the air up, but I shut the engine off when the system never started circulating, thinking that there may be a bubble around the thermostat.

So, two questions:

1. can someone point out the 2nd drain plug to me?
2. can someone let me know how to bleed the system?

thanks