Well, I decided it was (way past) time to change my coolant (61k). So, I drained it via the petcock at the bottom of the radiator. Spec on my '05 says there's about 6 quarts, but I got *maybe* 4 out of there. Further research suggests that there is also coolant in the block that doesn't get released this way.
Can anyone tell me if there are coolant drain plugs on the block somewhere? Of, if not, how to completely drain the system of old coolant?