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mbvanagon
Samba Member
Joined: December 19, 2008
Posts: 19
Location: Augusta, Missouri
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 Posted: Thu May 21, 2009 11:11 am Post subject: Fuel Filler Check Valve? |
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I was doing the fuel tank re-seal thing today and after I pulled the filler-neck and got the tank out from under the van I noticed this little white plastic ball on the ground under there, kind of like a small ping-pong ball. The end of the filler neck that goes in the tank has a little cage on it so I popped the ball into the cage and I assume it's a checkvalve to keep gas from going up the neck. I hadn't noticed anything like this in the Bentley or on the posts I've been reading to help me with this job. Van's an '89. Any thoughts?
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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17124
Location: Retired South Florida
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| Posted: Thu May 21, 2009 11:21 am Post subject: |
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When I worked at the dealer, there was a recall to add a flapper device to the fuel tank neck where the filler neck attached to prevent fuel from rushing up the neck when pressure was present on rabbits. I suppose it could have been introduced in production to other VW models once they knew there was a problem.
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allsierra123
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Joined: August 19, 2006
Posts: 1462
Location: Tecate, Baja California MX
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| Posted: Thu May 21, 2009 3:27 pm Post subject: |
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When I took mine apart I assumed that was what it was for. Makes sense really.
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greebly
Samba Member
Joined: August 27, 2009
Posts: 966
Location: Here and now
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| Posted: Wed May 11, 2016 12:24 pm Post subject: Re: Fuel Filler Check Valve? |
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| What a waste of time. I found the ball inside my old tank as well. Does not serve much purpose if it does not remain in the cage. |
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joetiger 
Samba Member
Joined: January 27, 2005
Posts: 5078
Location: denver
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| Posted: Fri May 13, 2016 6:55 am Post subject: Re: Fuel Filler Check Valve? |
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The filler ball was added in '88, apparently. I thought I'd gotten lucky at U-pull-it once and pulled a filler neck from an '89, only to find that the ball was gone. 
I thought about trying a ping-pong ball but I'm pretty sure they're not gasoline resistant...
Here's a good thread on the subject.
http://www.thesamba.com/vw/forum/viewtopic.php?t=396064&highlight=fuel++filler++ball
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'86 NAHT Vanagon GL Syncro/ supercharged ABA 2.0 "Pigpen"
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'04 Golf R32
"get metaphysical with it. if it's simply a means to get to and from places, it will let you down. if it becomes your zen, it can't fail you." -dabaron
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bluebus86
Banned
Joined: September 02, 2010
Posts: 11075
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| Posted: Fri May 13, 2016 9:14 am Post subject: Re: Fuel Filler Check Valve? |
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ping balls where used in wwii to fill the hulls and floats of seaplanes so that a bullet hole in the float or hull would not flood and cuase the aircraft to sink.
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