<VV> Fuel Tank Collapse

[tony..]

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..