Vented Gas Cap

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Sep 24, 2015 | 05:15 PM

pburress

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Joined: Jun 2005

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From: Wichita, KS

Vented Gas Cap

I got a new gas cap for my '63 F100 with the 262 i6, and they assured me that it was the vented type. But after driving, when I remove the cap, it sucks air every time. Does this mean that it's not vented?

Sep 24, 2015 | 05:24 PM

jmf66

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Joined: Feb 2009

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From: Near Nashille, TN

If it's like mine, it allows the air to be sucked in, but not vented out.

I had lot of pressure build up when setting out in the sun, so I disassembled the cap and modified it to vent both ways.

Sep 25, 2015 | 10:13 AM

sseebart

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Joined: Jun 2014

Posts: 291

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From: California

Some vented caps appear to be designed for fuel injected cars and certainly don't work with our trucks.

My solution is found at the end of this thread:

https://www.ford-trucks.com/forums/1...-for-long.html

Good luck!

~Steve

Sep 27, 2015 | 03:03 PM

pburress

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From: Wichita, KS

Thanks. I checked out that thread. So your solution was the different cap from Pep boys? Or the hole drilled?

Sep 27, 2015 | 08:19 PM

69supercj

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Joined: May 2010

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From: Fair Grove, MO

I was having these same issues and bought a new "vented" cap from Oreilleys but it wasn't vented to the atmosphere. The one from PepBoys solved my problems.

Sep 28, 2015 | 06:00 PM

sseebart

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Joined: Jun 2014

Posts: 291

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From: California

Quote:

Originally Posted by pburress

Thanks. I checked out that thread. So your solution was the different cap from Pep boys? Or the hole drilled?

The Pep Boys cap was well under $10, so I went with that, rather than drilling holes. Not sure how the manufacturer gets away with it but it appears to vent both ways--and completely solved my problem.

~Steve