I'll be honest though, there may be coolant leaking out of the actual drain, but the presence of fluid around that seal suggests it's coming from actual damage somewhere. (mechanics.stackexchange.com)
One of the symptoms of coolant leaks is low coolant level in the coolant bottle and coolant smell under the hood. (samarins.com)
The intake system is known to have vacuum leaks and also coolant leaking into the intake. (yourmechanic.com)