gas tank / gas cap

[John O.]

Hi guys. I need some info about my gas tank. I own a 1962 corvette 250 HP 4 speed.I just bought a new gas tank that I installed.I'm using a vented gas cap. The new tank I have has a hose coming off the top that goes along the top of the tank and down the side. Then it goes through a hole in the bottom of the fiberglass pointing to the ground.Is this a vent hose? If it is, then is it right that i'm using a vented cap? I thought I read some where that my car uses a non vented cap.Can someone help with this.If that is a vent hose on the tank, do I use a vented or non vented cap? If I need a non vented cap and use a vented cap, what can happen?

Thanks...John

[Mike E.]

Re: gas tank / gas cap

Non-vented cap was originally installed. Many/most 62's now have vented caps as they drive around--no problem with function, etc. Possible chance of fuel smell with vented cap because of fuel slosh.

[Dennis C.]

1962 Corvettes use a non-vented gas cap...

...the tank is vented through the small hose going from the top center of the tank to the inside of the gas filler area. It does not extend into the fuel drain outlet you reference.

John, may I suggest you step up to a 61/62 TIM&JG and a 1962 AIM. These two references will answer hundreds of questions you may have while working on your car. Best, Dennis

[John O.]

Re: 1962 Corvettes use a non-vented gas cap...

Hi Dennis

I saw in a book that showed the vent hose going into the gas door area.But mine has no hole for it to go in there. It does have a drain hole in the bottom of the gas door compartment to allow spills to get out.My car is the 149th car made.Could that be why I have no vent hole in the gas door area? Or could the hole have gotten cover up? Also what is the Tim&JG this is new to me?

Thanks...John

[Dennis C.]

OK, Easy one first...

...TIM&JG is short for a long winded semi-new name some idiot gave to the old NCRS Judging Manuals - Technical Information Manual & Judging Guide.

I am at a memory disadvantage on the vent line because my last 4 62 Corvettes had 24 gallon tanks, but I do believe there is a reasonably large hole and maybe a rubber grommet for the vent hose to go through as it enters the gas filler area.

Best Regards, Dennis (The "idiot" referenced above would be me...)

[Richard E.]

Re: OK, Easy one first...

Not bad for a youngster, Dennis. The tank vent line goes thru a grommet at the rear of the filler area and stops short of the forward wall. It is secured in place with a small clamp. The over-fill drain hose is attached to a plastic (?) nipple at the bottom forward end of the filler cavity and feeds downward. The vent line and over-fill drain hose are not physically connected. Pretty good picture in Sect 8 of the AIM. ...Regards, Dick