I have a '64 F100, 223 6 cylinder. Fuel tank behind the rear seat. I have noticed a gas smell in the garage for the last few months. The tank had about a 1/4 to half for that time. I just filled it up last week, and I noticed the smell in the laundry room.

I live in Florida.
Temps are rising for summer.
No leaks under the truck ( I haven't seen any in the cab)

Could this be from the heat and the fuel tank is just expanding because of the heat?

It's a typical 1 car garage attached to the house via the laundry room.

If so...any tips.

All info and links appreciated and welcomed.

thanks,

rtc

 

The gas cap is vented to the atmosphere - it has to or as it draws gas to the pump the tank would become vacuum locked - no air in, no gas out. So, yes, the stock tank will vent fumes into the air.

If you fill a tank completely full and then go park in the sun or hot enough area on a level surface you will likely have gas pouring down the side of the truck from the gas cap/tank. While it is an awful design it would be operating normally if it did this.

Not a lot a person can do with the stock setup - the gas cap does have a sort of cardstock type of gasket on it. Making sure that gasket is sound is one of the few things that helps a tiny bit. If that gasket is gone or in rough shape it makes the problem a little worse.

 

Recommend an exhaust fan in the garage..

 

That's what I was thinking...thanks.

rtc

 

Especially important if you have a gas dryer..

 

WELCOME TO FTE!

RTC,
I suggest you closely inspect the rubber section inside the cab connecting the filler stub to the tank. This rubber section gets old and drys out and cracks and allows gasoline vapors into your cab. If your window is down, the vapors will come into the garage. There is also a section of rubber fuel line beneath the cab where the fuel line exits the cab and makes the bend toward the engine compartment. That section of hose can also be leaking. It may not leave a puddle - since gasoline evaporates quickly - especially in the Florida heat.

BarnieTrk

 

Won't be any fuel odors if gaskets and fuel tank hose, rubber lines &c are good. These need replaced. Tank itself, could have pinholes is another possibility. Remove the sending unit and take a peek inside the tank, if it is full of rust and sediment might think about replacing it.

 

I just replaced my grommet and connector on Sunday. About a 20 minute job.

 

....time to check the hose under the cab.

BarnieTrk