Gas tank pad on a 66 belvedere

[66 bel]

I have a gas tank pad problem I Think! I put a new tank on the car and a new tank pad. The new pad is some what thicker it seems that when I put the fuel neck in the new tank it doesn't go in far enough . Because it leaks around the grommet. I think the pad is not letting the tank set back far enough . The old pad was made out of a tar paper material . Any suggestions from you Guys?
Thanks billy

 

[2quick]

Mine leaked too when full, found out the grommet was push in and rolled over on one side but couldn't see it from underneath.

 

[66 bel]

OK thanks I will check

 

[PurpleBeeper]

Yeah, my pad was thicker than stock & I had to use a piece of plywood and a jack to get the tank all the way up the first time I installed it.

About that seal..... isn't there a newer (e.g. maybe late 60's/early 70's) "double lip" seal that fits & still looks stock from the outside? That might help.

 

[66 bel]

OK I will check that also. Does anyone know what material the original pads were makeven of?

 

[66 bel]

Made of

 

[67GTX440]

I covered my tank top with second skin, which is pretty thick. I tried the new double seal grommet first attempt at install and had leak issues. I ordered one for a 67 GTX from a fuel filler supplier and it seems like a tight install, but leaked something awful. I went back to a new original type grommet and that solved the leak issue.

 

[R/T]

I hear a lot of guys with 66/67 fuel fill inlet issues, always seems like it has to do with the tube's grommet, as for the pad, i just buy a roll of tarpaper and cut myself a sheet, a thin layer is all you need keeps out moisture between the tank and trunk skin.