High pressure release when opening gas cap on 1956 Thunderbird

zuburg

zuburg

Senior Member
Probably nothing, but I want to make sure this is normal. I finally got my 1956 T-bird roadworthy after 5 plus years.

When I opened the gas cap to add fuel, a huge release of pressure blew out the fill tube. The tank is not original and it was nearly out of fuel.

Is this normal or do I need some kind of vented gas cap? I assume the cap that came with the car is invented?
 
You need a new cap - all the early birds used a vented gas cap. Your is not vented or the vent is clogged. Cheap way out is to drill 1/16 hole in your cap
 
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