I have a 1991 Explorer XLT w/183,000 miles on it. My problem is when I start her up.She makes a high pitched squeal that is sort of rythmic. I can tell it is from the belt or the bearings. It stops after the engine is good and warm. I wonder if I should replace the belt, but upon inspection it looks to be in order. I replaced the water pump about 2.5 months ago, along with the upper radiator hose. The hose has a slow leak between the Therm cover and the hose that I am trying to sort out. Could the liquid from the hose be causing this sound and how worried should I be. She runs as smooth as a
14-15 year old truck should, little to no oil loss and noCEL's.Thanks in advance.