Air conditioning noise

Hi,

When the A/C turns on, there is a heavy load placed on the engine. Often times, a loose heat shield on the vehicle's exhaust system will do it. I attached an exploded view of the exhaust and circled two heat shields so you have an understanding what I referring to.

What to do is this. Take a rubber mallet and tap on the exhaust system to see if you can reproduce the sound. If you can, then have a helper tap while you locate where it's coming from.

Let me know what you find. Also, pay attention to see if the sound seems to come from under the hood or under the vehicle. I noted that it seems to make the noise when the A/C compressor is turning on.

I will watch for your reply.

Joe

Hi,

I'm having a hard time hearing it. I do hear something, but I'm not completely sure. To me it almost sounds like an air flow restriction. Have you ever replaced the cabin air filter? Here is a link that explains how it's done. Your's is behind the glove box.

https://www.2carpros.com/articles/how-to-change-an-air-cabin-filter

Let me know.

Joe