I have noticed since it has been getting warmer that my 96 850 wagon is making a strange gurgling noise I'm pretty sure under the hood. I am using the a/c when this happens but it really doesn't sound like it is coming from the dash. It does not do it when I shut the car off more when I am coming to a stop. If anyone has any advice to what this is it would be greatly appreciated!

 

Also the temperature gauge stays normal but still very worried it is overheating