Check out this thread and make sure you check the thread that is linked in post #5 http://www.tractorbynet.com/forums/...ng/177267-bx-radiator-drain-plug-removal.html. The drain plug on a BX24 is very hard to reach and even if you reach it, you may not get it off and back on. Pulling the lower radiator hose is the easiest way and then remove the block drain plug to get the rest of the coolant out. The block drain plug isn't in the manual but there is a picture of it in the 5th post as mention above.