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Old 08-28-2021, 06:07 PM   #1
zuburg
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Default High pressure release when opening gas cap on 1956 Thunderbird

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?
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Old 08-28-2021, 06:51 PM   #2
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Post Re: High pressure release when opening gas cap on 1956 Thunderbird

Read through this previous thread -

https://www.fordbarn.com/forum/showthread.php?t=299953
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Old 08-28-2021, 08:07 PM   #3
paul2748
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Default Re: High pressure release when opening gas cap on 1956 Thunderbird

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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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