Temporary howling noise

[Grant20]

Just got a 2021 Defender  HD8 and I have experienced a howling noise on hot days (33 degree Celsius/ 92 fahrenheit). I listened to the cooling fan up front but it was not the source of noise. The dash temperature gauge never showed temperatures above (91-92 degrees) in fact was mostly in the mid to high 80's Celsius. I'm wondering what this noise could be? a secondary cooling fan for the CVT maybe? 

 

[Mikep123456]

I had a similar noise. I let the air out if the gas tank and it went away. But would eventually come back. 

 

[A hunt 2 remember]

Seems as if you have the tank vent issues others have had... There are a couple things to try. I've not had the issue, but others have. There are a couple threads here that address the issue. Next time it happens, loosen your gas cap and see if it stops... 

Good luck

 

[RagDude]

Yep, sounds like venting noise from the gas tank/cap on warm days.  Gets worse when hot.