So my '51 3100 has been running wonderfully. Been driving it everywhere. ...until yesterday.
The gf and I went out for brunch, I filled up on the way and parked in a surface lot in the sun. Temp was probably in the upper 80's or so. When we got back to the truck there was gas flowing out of the filler neck, running down the side of the cab and pooling on the running board and ground. When I loosened the cap there was a fair amount of pressure causing gas to spray. So, I removed it completely and just let it empty what it needed. When it finished the gas was to the top of the filler neck. After putting the cap back on, I cleaned up the mess with an old towel and started it. The level went back down and everything seems fine.
My first thought was that the heat caused the fuel to expand but while the back of the cab was hot from being in the sun, the tank felt cool.
...any ideas?
