ale6jandro
Member
So I got this Ford Expedition 2007 Limited last year. I love it.
It has now 75K miles.
A month ago it started doing this whining noise while I was driving in the freeway. The noise is on acceleration mostly, unless you stay in a particular RPM not always the same.
First I thought about the serpentine belt so I changed, belt, tensioner and 2 idle pulleys.
Sound was still there.
I was suspecting on the alternator, but I did a test: I took out the belt and started the engine.
The noise is still there on acceleration. I think that should rule out Alternator, Steering pump or any other moving parts related to the serpentine belt.
The noise is high pitch and very difficult to locate (I tried with an stethoscope), but I could assure is on the passenger side of the engine.
The noise is still there with the vehicle in Parking, just accelerating on the 1500-2500 RPM range.
Link to a video with the noise
Any ideas and or advise would be greatly appreciated
It has now 75K miles.
A month ago it started doing this whining noise while I was driving in the freeway. The noise is on acceleration mostly, unless you stay in a particular RPM not always the same.
First I thought about the serpentine belt so I changed, belt, tensioner and 2 idle pulleys.
Sound was still there.
I was suspecting on the alternator, but I did a test: I took out the belt and started the engine.
The noise is still there on acceleration. I think that should rule out Alternator, Steering pump or any other moving parts related to the serpentine belt.
The noise is high pitch and very difficult to locate (I tried with an stethoscope), but I could assure is on the passenger side of the engine.
The noise is still there with the vehicle in Parking, just accelerating on the 1500-2500 RPM range.
Link to a video with the noise
Any ideas and or advise would be greatly appreciated
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