Just in case it wasn't asked or looked at, but how old is the gas cap? Could it be contributing to the problem and not the filler neck seal?

On May 17, 2012, at 9:49 AM, Ken Wilford <kenwilfy@COMCAST.NET> wrote:

> Bryan, not sure this is going to work.  The gasoline will probably just
> melt the silicon and you will have contamination in your fuel tank and
> still have a leak.  The key is having a smooth, even surface for the
> filler neck to seal to the seal itself.  If there is some rust or
> pitting on the filler neck where the seal touches it that could be
> causing the leak.  Also when installing the seal I always lubricate the
> seal itself with petroleum jelly.  This allows the parts to slide
> together smoothly and prevents any pitting in the pipes from ripping
> small grooves in the seal during the install process.
> 
> As Chris mentioned you can also go to the later model plastic filler
> neck.  You would have to either change your tank since that filler neck
> is much smaller (50mm vs 70mm) or find someone selling the filler neck
> adapter seal which allows for the installation of the later model filler
> neck into an earlier style tank.  I believe this seal is part number
> 251201139B.
> 
> Let me know if I can help you further,
> 
> --
> Thanks,
> Ken Wilford
> John 3:16
> www.vanagain.com
> Phone: 856-327-4936
> Fax: 856-327-2242
> 
> On 5/17/2012 7:26 AM, B Feddish wrote:
>> OK, I’ve had this issue probably 2 years now.  After filling up the gas tank I am rewarded with a gas soaked filler tube after each right turn.  I have replace everything from the filler tube to the gas cap twice with new and used parts.  I am getting ready to take it all apart again and apply a thin bead of silicon around all the parts around the top of the tube to the cap unless someone has anymore suggestions.  Yes, I know the later years had that floaty-ball ball in there to stop this “defect” but I have the 83.5 with the foot wide filler tube that allows half the tank to slosh up it at every turn.
>> 
>> Thanks,
>> Bryan
>>