Loud knocking noises?

2010 NISSAN MURANO
178 MILES
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BROOKNHUTCHINSON
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Just bought the vehicle listed above, the previous owner said it was in great mechanical condition. Now a week later the A/C won’t work, it sounds like it won’t shift gears when I drive it making a loud noise and when I’m parked it sounds like something is knocking and hitting together. I’m worried it’s about to fail on me. I can send a video of it making the sounds if needed to help better.
Oct 1, 2022 at 12:45 PM
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JACOBANDNICKOLAS
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Hi,

How would you best describe the sound? For example, does it sound metalic? Is there anything that makes it worse or better?

If you could record and upload the sounds, that would be very helpful. Hopefully, I will recognize where to start checking.

Let me know.

Joe
Oct 1, 2022 at 3:27 PM
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BROOKNHUTCHINSON
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Joe, I will send you an audio Sunday so you can hear the sounds.
Oct 1, 2022 at 9:47 PM
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BROOKNHUTCHINSON
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Video 1.
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Oct 3, 2022 at 6:22 AM
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BROOKNHUTCHINSON
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Video 2
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Oct 3, 2022 at 6:24 AM
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BROOKNHUTCHINSON
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I’m not sure what to do Joe. I’ve only had it since September 20 and like I mentioned in my first post the guy I bought it from said everything was great with it mechanically. He said his grandma bought it new in 2010 and drove it all these years and has never had any issues. When I started hearing this noise, I knew something didn’t sound right and I’m just worried something may be wrong and I do not know what to do. Any help would be appreciated.
Oct 3, 2022 at 6:26 AM
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BROOKNHUTCHINSON
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Also, the A/C has quit on me and when I drive it sounds like it wants to shift gears but doesn’t. It doesn’t do that when I’m driving slowly. Any input on this too would be great.
Oct 3, 2022 at 6:28 AM
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JACOBANDNICKOLAS
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Hi,

I certainly hear it. To me, it almost sounds like a serpentine belt tensioner flapping because it lost tension. Have you checked to see if the belt is somewhat loose?

Let me know.

Joe
Oct 3, 2022 at 8:08 PM