Engine block drain plug??? Help!

Hey,
I'm going to change the coolant in my car, and I was wondering if anyone knew where the block drain plug was located on SR20DE???
The owners manual doesn't mention it, only air relief plug. There has to be one, right?
Also, I'm going to replace the thermostat also, and I was wondering if anyone knew the torque specs for the housing?
THANKS A LOT!
Regards,
Viktor

Hey,
I did my homework and here is what I found:

http://www.zotz.com/nissan/proc/sentra_se-r/sentra_se-r_coolant_change_photo.htm

Thanks! :D

tight tight good job! lol