Gas Leaking Around Gas Cap


Information and questions on GL1500 Goldwings (1988-2000)
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okie2ee
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Joined: Thu Aug 09, 2018 4:39 pm
Location: Sapulpa, OKlahoma
Motorcycle: 1992 Honda Goldwing 1500 Interstate
1986 Yamaha V-Max
1994 Yamaha V-Max

Gas Leaking Around Gas Cap

Post by okie2ee »



I finally found the source of my gas smell when riding, the plastic tray surrounding the gas cap is wet with gas. I filled the tank today and rode home and the tray was wet with gas. The gas cap appears to be sealing properly based on feel only. Is this common to have to replace the rubber gasket on the gas cap? Or is the gas coming from somewhere else............thanks





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bellboy40
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Location: Brewton, AL
Motorcycle: 2000 GL1500SE Candy Spectra Red

Re: Gas Leaking Around Gas Cap

Post by bellboy40 »

It could very well be leaking from the fuel petcock. It is vacuum operated and has a rubber diaphragm inside that is prone to developing a leak sometimes. It is the unit right in front of the gas cap that has the gas lines going to it. If it is what is leaking, you can purchase a rebuild kit to repair it. Cyclemax in Ohio is one place to get it.
https://cyclemax.com/inc/sdetail/gl1500 ... _kit/20457

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NOVAwing
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Location: Nothern Va
Motorcycle: 1993 GL1500 Aspencade

Re: Gas Leaking Around Gas Cap

Post by NOVAwing »

I second the fuel petcock valve.

Parts are cheap and its easy to rebuild if your handy.
NOVAwing
1993 GL1500 Aspencade, restored from 4 years rotting outside.

“A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.”

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okie2ee
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Location: Sapulpa, OKlahoma
Motorcycle: 1992 Honda Goldwing 1500 Interstate
1986 Yamaha V-Max
1994 Yamaha V-Max

Re: Gas Leaking Around Gas Cap

Post by okie2ee »

Thank you for the feedback...............I've ordered a petcock rebuild kit

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RBGERSON
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Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Gas Leaking Around Gas Cap

Post by RBGERSON »

Yep there is a weep hole in that unit...singalong you need to rebuild!!
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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bluthundr31
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Location: Morgan Hill, CA.
Motorcycle: 1991 GL1500 Interstate (Cinnamon Beige)

Re: Gas Leaking Around Gas Cap

Post by bluthundr31 »

Troubleshooting/checking the fuel petcock is probably your best bet to resolve the issue, , , , but, , , since you commented about the gas cap, , , soak that gas cap in a vinegar solution for a couple hours and watch all the rust/crud that comes out, , , , blow it dry with compressed air then lube (WD40) well so the springs and tabs work smoothly.

Scaldedchevy
Posts: 30
Joined: Thu Apr 04, 2019 4:57 pm
Location: DeRidder, LA
Motorcycle: 1988 GL1500 SE

Re: Gas Leaking Around Gas Cap

Post by Scaldedchevy »

Hello. I am having the same issue now. I will be ordering a rebuild kit. One question, do I need to drain the fuel cell before I pull the petcock off, or will it not have gas coming through unless the fuel pump is cycling?

Thanks
James

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MikeB
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Motorcycle: 1998 - GL1500 Aspencade
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2017 - GL1800 Audio Comfort
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Re: Gas Leaking Around Gas Cap

Post by MikeB »

No need to drain the tank. The tank is below where you will be working and fuel will not flow uphill.
There will probably be a bit of fuel in that auto shut off valve but not much. Just have a few shop towels in fuel filler tray to catch that little excess fuel in the shut off valve.
MikeB
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
USAF Avionics Communications Tech - 18 Years / Flight Engineer C-130E - C-141B - 6 Years. Retired.
Industrial Maintenance Tech - 22 years.
Retired in Tacoma, WA

Scaldedchevy
Posts: 30
Joined: Thu Apr 04, 2019 4:57 pm
Location: DeRidder, LA
Motorcycle: 1988 GL1500 SE

Re: Gas Leaking Around Gas Cap

Post by Scaldedchevy »

Awesome, thank you very much.
James



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