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 Post subject: Fuel cap gasket
PostPosted:Sun Aug 14, 2022 6:40 pm 
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4 BBL ''Hyper-Pak''
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Joined:Sun May 02, 2010 8:54 am
Posts:36
Location:Minnesota
Car Model:1970 Dodge Dart Custom
Hey everyone, I've had issues where the fuel cap gasket seems to melt and stick to the filler tube of my 1970 Dodge Dart.

I'm just wondering if anyone has any good sources of just the gasket for the fuel cap?

Also wondering if anyone has good ideas as to why this is happening, and what I can do to prevent it?

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_________________
2015 Dodge Dart GT (Daily Driver)
2006 Dodge Charger Daytona, Top Banana #3874 of 4000 (lots of fun)
1970 Dodge Dart Custom 225 Slant Six, Auto, A/C (good car, engine rebuild)


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 Post subject: Re: Fuel cap gasket
PostPosted:Mon Aug 15, 2022 12:19 pm 
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Joined:Thu Oct 31, 2002 5:39 pm
Posts:24335
Location:North America
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It calls for using a gasket made of an appropriately gasoline-resistant material. Viton, for example. You will likely have to do some hunting; I don't have the measurements for what you need, but I think a 2" outside diameter is probably roughly what you're after. The inner diameter will be a bit of a wildcard. Here's a start, and if none of those is appropriate you might wind up writing here, here, here, here, and here. Or maybe get some 0.050"-ish Viton sheet and a gasket punch set and make your own.

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 Post subject: Re: Fuel cap gasket
PostPosted:Wed Aug 17, 2022 3:52 am 
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Supercharged
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Joined:Sat Nov 27, 2004 8:03 pm
Posts:9248
Location:IRWIN PA
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you can also Check with Detroit Muscle Technologies.

I Spoke to James Fillmore at Carlisle and he was going to help me get the Same gasket for my '64 Dart.

Greg

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 Post subject: Re: Fuel cap gasket
PostPosted:Sun May 26, 2024 6:33 pm 
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4 BBL ''Hyper-Pak''
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Joined:Sun May 02, 2010 8:54 am
Posts:36
Location:Minnesota
Car Model:1970 Dodge Dart Custom
Just a small update here. Over the winter months I picked up a 6" x 6" x 1/32" sheet of Viton rubber sheet from Amazon. I feels like the 1/32" is a good thickness at least compared to the gaskets that came with my previous fuel caps. I used the deteriorating gaskets to mark out and cut new replacement gaskets. They are not perfect since it's just me and a scissors, but they fit fine and should perform the task. Later this Summer, I will update to see if the Viton holds up. Thanks all for the suggestions.

edit: Oh, also as for the OD of the gasket, I measured with a caliper, and that came out to 2.135". Seems to be a pretty good size.

_________________
2015 Dodge Dart GT (Daily Driver)
2006 Dodge Charger Daytona, Top Banana #3874 of 4000 (lots of fun)
1970 Dodge Dart Custom 225 Slant Six, Auto, A/C (good car, engine rebuild)


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 Post subject: Re: Fuel cap gasket
PostPosted:Sat Jun 08, 2024 2:57 am 
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3 Deuce Weber

Joined:Thu Nov 09, 2023 5:12 am
Posts:81
Location:Hudson Valley, NY
Car Model:1964 Dart 270 4-Door
Hey, Beitie,

I'm cheap and you may be, too!

Have you any interest in selling one or two 2-1/4" squares of your 6x6" to recoup your investment?

Should be able to go in a regular envelope with normal postage.

I'd hate to spend a whole $15 and have all that extra staring at me from a spot by my workbench for, probably, the rest of my life.

Thanks!

– e


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 Post subject: Re: Fuel cap gasket
PostPosted:Fri Jun 14, 2024 7:47 pm 
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4 BBL ''Hyper-Pak''
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Joined:Sun May 02, 2010 8:54 am
Posts:36
Location:Minnesota
Car Model:1970 Dodge Dart Custom

_________________
2015 Dodge Dart GT (Daily Driver)
2006 Dodge Charger Daytona, Top Banana #3874 of 4000 (lots of fun)
1970 Dodge Dart Custom 225 Slant Six, Auto, A/C (good car, engine rebuild)


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 Post subject: Re: Fuel cap gasket
PostPosted:Sat Jun 15, 2024 3:32 am 
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3 Deuce Weber

Joined:Thu Nov 09, 2023 5:12 am
Posts:81
Location:Hudson Valley, NY
Car Model:1964 Dart 270 4-Door
Thanks anyway, Beitie!

Do you feel that the 1/32" was the right thickness?

I wasn't sure whether that was good, or whether it should be 1/16", because my gasket had gotten thinner as it dried out over 60 years.

Thanks,

– Eric


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 Post subject: Re: Fuel cap gasket
PostPosted:Sat Jun 15, 2024 1:05 pm 
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4 BBL ''Hyper-Pak''
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Joined:Sun May 02, 2010 8:54 am
Posts:36
Location:Minnesota
Car Model:1970 Dodge Dart Custom
1/32" is correct for sure. I compared the thickness with my deteriorating ones, and it's perfect.
Here's a link to the sheet I ordered: https://www.amazon.com/gp/product/B07Y5KPL9H/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

_________________
2015 Dodge Dart GT (Daily Driver)
2006 Dodge Charger Daytona, Top Banana #3874 of 4000 (lots of fun)
1970 Dodge Dart Custom 225 Slant Six, Auto, A/C (good car, engine rebuild)


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 Post subject: Re: Fuel cap gasket
PostPosted:Sat Jun 15, 2024 1:12 pm 
Offline
3 Deuce Weber

Joined:Thu Nov 09, 2023 5:12 am
Posts:81
Location:Hudson Valley, NY
Car Model:1964 Dart 270 4-Door
Thanks!

I bookmarked a few of them. I just wanted to be sure of the thickness before ordering one.

– Eric


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 Post subject: Re: Fuel cap gasket
PostPosted:Thu Jun 20, 2024 2:47 pm 
Offline
3 Deuce Weber

Joined:Thu Nov 09, 2023 5:12 am
Posts:81
Location:Hudson Valley, NY
Car Model:1964 Dart 270 4-Door


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