Tank strong drepression

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Mar 25, 2019 | 04:25 PM

Petof

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From: Essonne

Tank strong drepression

Hi,

When I open the cap of the gas tank it often generates a strong depression noise coming from the air filling the empty room of the tank. Is this normal or is it a signal that something is wrong with the air management within the tank ?

Thank for advices,

Pierre

Mar 26, 2019 | 09:37 AM

iolmaster

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From: Virginia

Quote:

Originally Posted by Petof

Yes, perfectly normal. The system evacuates the tank to make sure gas vapors do not escape into the environment. It can create a vacuum noise that you will notice when you release the cap.

Mar 26, 2019 | 10:22 AM

Petof

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From: Essonne

Thanks, meanwhile I found informations explaining EVAP system.

Mar 26, 2019 | 11:36 AM

heshamos

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Joined: Oct 2014

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From: Canada

Quote:

Originally Posted by Petof

Thanks, meanwhile I found informations explaining EVAP system.

Please share the info if appropriate.

I don't really hear anything more than a little "hissing" when I remove the tank cap. I'm just wondering if there's anything else that would cause extreme "vacuum" inside the tank.