why is the goldwing fuel tank pressurized?


Information and questions on GL1500 Goldwings (1988-2000)
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shade tree
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Location: Grand Rapids, Michigan
Motorcycle: 1996 GoldwingA

why is the goldwing fuel tank pressurized?

Post by shade tree »



When ever I open my fuel tank their is a pressure release. why is the fuel tank pressurized?



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tfdeputydawg
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Re: why is the goldwing fuel tank pressurized?

Post by tfdeputydawg »

YOU NEED A NEW GAS CAP

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bellboy40
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Re: why is the goldwing fuel tank pressurized?

Post by bellboy40 »

It is not uncommon for you to hear a rush of air when opening the gas cap, especially after a ride in hot weather. That gas tank is right behind the engine and gets a lot of warm (hot) air blowing across it.

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CrystalPistol
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Re: why is the goldwing fuel tank pressurized?

Post by CrystalPistol »

shade tree wrote:
Tue Mar 31, 2020 8:08 am
When ever I open my fuel tank their is a pressure release. why is the fuel tank pressurized?
Because you put cold gasoline in it from a ground tank and it gets warmed in the tank, especially if the bike engine is warm. The cap is vented to allow air inlet so no vacuum develops as fuel is pumped out during your ride … but not vented to allow escape of air or fumes to prevent pressure build up due to heat expansion of fuel, just not a problem.
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ct1500
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Re: why is the goldwing fuel tank pressurized?

Post by ct1500 »

Federal regulations do not allow the direct venting of motor vehicle gasoline vapors known as SHED emissions into the atmosphere going on at least 45yrs. now with standards set under the Clean Air Act. Fuel vapors under pressure are contained within the tank or diverted to a charcoal cannister on CA emission equipped models. Normal for the fuel cap to hold a pressure but it must allow air in when needed to prevent a vacuum within the fuel tank which can starve the engine for fuel.


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