I am working on my 91 xj and I discovered the tube from the coolant resavoir is not conected, this is a closed system (no rad. cap) I found the tube hanging down behind the ac compressor I have not located where it connects to the coolant system, i am used to seeing it conecting to the neck of the radiator but the tube is not long enough to reach that and the is no spud there to connect it to. thanks for the help.