Join Date: Sep 2009
Thanked 191 Times in 147 Posts
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I had that after my fernco cap and before the billet cap. I stopped using it. I got thinking it may over time crack the filler neck. Tightening the wing nut expands the rubber seal. I have no proof or evidence that it may hurt anything. I just noticed over time i had to turn the wing nut more. When i got the billet cap it came with three o rings. I had to get a fourth even larger o ring to seal the cap. I attributed it to having a stretched filler opening. I just did not want to risk cracking it. But, i will say again i have no proof. It was possibly paranoia about nothing. Sort of a solution looking for a problem.
Ram 14 2500 RIP 14,700 Stock. 68RFE."The Lemon"
Ram 15 3500 Dually. Stock. Aisin. N Fab wheel to wheel. Weather Tech Mats. Big D Steering Box Brace.