I drained my coolent on my 99 mistique about 2 years ago, don't recall a big problem with radiator plug, but this does not appear to drain all of the coolant. there appears to be a plug on the back side of the block right at the end of the starter motor near the freeze plug that looks like a block drain so one can get all of the coolant out. most any motor I have seen has a block drain plug. am going to change my coolant soon and am going to remove this plug to see if it is a water jacket drain, or oil gallery drain. any one out there know for sure which it is?
