Originally posted by Terry Haines:
Without the 'cone' you no longer have a pump but just a paddle!,this will not circulate the coolant correctly.I suggest you get the rear housing so the pump is complete.The clearence between the impeller and the cone is a critical factor in any centrifical pump,the size of the hole in the cone affect the suction and flow rate...I suggest you study how a centrifical pump works! 
I realize it shouldn't work, but we decided to try it and it is working fine for now. Temperature gauge reads the same as it did before. So it is Working, granted not as efficiently as if it had the cone, but it is working.
