Quote:
Originally Posted by thom4782
There is a third valve in that area that can make a noise. It is the AC expansion valve. Mine makes some noise, but it is different than the noise in the video. It's easy enough to check. Lift the hood, remove the access cover to the left of the battery cover, turn the AC on and listen while standing next to the car. It will be obvious if its the expansion valve.
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Thanks, I'll try this. Any others want to have a guess at what the sound could be caused by?