Are the new M8 softail fuel tanks pressurized
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Intermediate
Joined: Sep 2006
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From: ocala
Are the new M8 softail fuel tanks pressurized
Had a fuel leak coming from the fuel vent line. Dealer installed new check valve in the line, now when I remove the fuel cap, I can hear air pressure being released. Is this normal, or did perhaps the dealer install the check valve incorrectly?
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Joined: Apr 2016
Posts: 72
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From: Alton Bay, New Hampshire
Hope this helps.Don't know what softail m8 you have. I looked thru all the tanks and they all have a check valve. You can see how it's installed in the picture.
you should never have pressure when you open the cap. Even with a California model, which has a complicated evap system/canister and purge valve. There is also a check valve in the fuel pump system to keep the high pressure to the injectors.
Last edited by PilgrimsDad; Jan 9, 2018 at 11:00 AM. Reason: added
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Intermediate
Joined: Sep 2006
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From: ocala
Went back to the dealer and yes the valve was installed upside down. But when installed correctly the valve lets fuel leak out, so Harley Corporate says install it upside down and install new fuel cap and see how that works. Guess I'm the test mule for this issue. Just hope I don't blow up the bike and myself.
Club Member
Joined: Feb 2013
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From: Edmonton, Alberta
Went back to the dealer and yes the valve was installed upside down. But when installed correctly the valve lets fuel leak out, so Harley Corporate says install it upside down and install new fuel cap and see how that works. Guess I'm the test mule for this issue. Just hope I don't blow up the bike and myself.
Road Warrior
Joined: Dec 2008
Posts: 1,998
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From: Madisonville, La
The tanks are not pressurized. The air sound was air entering the tank when the cap is unscrewed indicating a problem with the vent not allowing to enter as the gas is used up creating a slight negative pressure in the tank.
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Longshot USMC
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Jul 24, 2014 10:25 PM
