| Overfilling the gas tanks? [message #320424] |
Fri, 14 July 2017 13:45  |
lw8000
Messages: 201
Registered: July 2012
Location: S.E. Michigan
Karma:
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Senior Member |
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A couple times after filling up and driving in warmer weather (this time 83 degrees or so), I have noticed the smell of gas and can hear air hissing from the gas cap, even a small trace of gas on the cap itself, after shutting off the engine. I think this is where the smell is coming from. It also seems to happen more often when I have full tanks or just after topping off and driving a short distance. I've read here about how the venting system works and now I'm wondering if I'm filling up to the point where these vents are being blocked. The tube from the filling point to the tanks is pretty long and I would guess can hold a few gallons?, and when I fill I usually try to go as high as I can (usually try to add about 5-7 gallons after the gurgling starts). Now I'm starting to wonder if I'm overfilling. Is this even possible?
I am pretty sure I have the correct cap, it is a vented one from the PO. My next step will be to try a different cap to see if it makes any difference (I found the part numbers mentioned here).
Thanks!!
Chris S. -
77 Kingsley, 3.70 FD, mostly OEM -
S.E. Michigan
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