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I have a 1988 Motorhome on the E350 chassis with a 460 and 22K miles. All oils/fluids etc.. have all been changed regularly but All of a sudden I have a very loud and "squeak" from the engine compartment, but I cannot locate source. When I start cold it does not squeak, but when I drive fora awhile, it comes back.
No water is leaking and it does not appear to be the water pump (although could be?) Don't know the last itme the belt was changed or if it is a belt. Noise is very loud and hard to tell where it is coming form. Anyone have a similar issue or can help me trouble shoot this problem? Enginer runs great, does not heat up, no leaks, power is good, just loud noise?