Because your Jeep has been running hot and using water, plus the belt failure- I suspect a faulty water pump.
If the pump had partially seized up and become hard to turn, it could cause the belt to wear rapidly. Water pump seal failure could be the cause of needing to refill the radiator. Look for leakage behind the water pump pulley on the bottom.
Another possibility of the cause of the belt failure is the tensioner pulley or the idler pulley could have bad bearings causing either of them to seize up- causing excessive and rapid belt wear.
It is possible that the problems are not related. You could, for instance, have a small leak in the radiator or hoses causing the water loss and the belt problem could be any of the above-mentioned problems with the idler/tensioner pulleys.
I cannot stress enough the importance of NOT OVERHEATING THE ENGINE! This can cause expensive, catastrophic failure.
Friday, February 20th, 2009 AT 11:09 PM