Could be several things. WHICH ENGINE?.. 4 cylinder (has three belts, power steering/water pump, alternator & A/C compressor, one tensioner pully A/C compressor), The V6 2.7 (has only one belt, 1 Idler pully and 1 tensioner pully), the V6 3.5 has two belts - A/C/alternator, and power steering - there are two tensioner pullys). Noises can be caused by the belt(s) themselves, pullys, bearings, pully bearings, water pump shaft bearings (or belts/pullys rubbing up against something). Let's not forget that there is also belt(s) behind the Timing Belt cover as well as pullys and bearings associated with the timing system. You could start by removing one accy drive belt at a time (alternator, water pump, compressor, power steering, etc) to see whether or not the noise goes away in each case. If after each case, you discover the noise is still there, it's probably behind the timing belt cover (idler/tensioner pully, water pump shaft bearing, crankshaft bearing, etc.). Good Luck
Have you checked your transmission filter? A clogged filter may cause the pump to cavitate -- causing a constant high-pitch whine in the engine compartment. It won't matter if the AC is on or off, and it will whine at any speed. It won't be intermittent.
Has anyone found the solution? Mine is doing the same thing abd just started leaking water
A belt on my 2004 Santa Fe was starting to make a lot of noise, so garage replaced it. Then immediately it began making a high pitched steady whining noise--whenever I touch the gas pedal. I took it to mechanic again, about six months later, and he said the balancer needed replacing, and he also went ahead and replaced timing belt. It still made the noise. He though it was alternator, so he ordered it, put it on, and took it off as it was not the alternator. Is there something specific I should be looking for? My power steering seems just fine, but perhaps water pump??
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