<VV> Fuel Tank Collapse

[jim bannister]

Did anyone think of a vented gas cap that would allow the gas tank to inhale, thus preventing collapse and a vacuum lock interrupting fuel flow.  Seems like a no prainer to me.
Jim, '66 turbovert

-----Original Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of tony.. via VirtualVairs
Sent: Saturday, February 15, 2020 4:40 PM
To: virtualvairs at corvair.org
Subject: Re: <VV> Fuel Tank Collapse


On 2/15/2020 12:45 PM, Grant Young via VirtualVairs wrote:
> GM had a problem with collapsing tanks when they went to plastic. I had one replaced on my 1995 Impala SS because when it got low on fuel the tank would partially collapse - resulting in a tow to home, and then it would be fine when it was backed off the tow truck. Heard it was a problem for several years until they made the tank stronger.

I had a '69 Barracuda that sucked its gas tank almost flat after the gas 
cap vent got plugged somehow.   Aggravating.

I fixed it by first buying another gas cap, then I made a rubber collar 
that fit the filler neck, drilled a hole through it, jammed it into the 
filler neck and stuck my air hose in the hole and pumped the tank back 
up til it went "plonk" and popped back into what was fairly close to its 
original shape.  It only took about 5 PSI to do it.

tony..


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