Put a Cork in it? But what kind?

[davem222]

Hey guys,
I am running a lowbrow p-nut tank and bought one of their cheaper 1/4 turn gas caps. The cork seal in it is total crap and is shredding pretty fast. I'm ok to buy a new cap but the metal parts of the cap seem totally fine. Any thoughts on 1) if I should get a new cork seal and if so where I can find them 2) Is there a better seal out there? Can I get one that will work that's some sort of rubber or plastic? Does it need to breathe like cork does? 3) If this is a losing endeavor, where do you all recommend buying a new, higher quality cap? Thanks!

Dave

 

[weekendrider]

I get cork in sheets from the local O'Reilly's auto.
Not sure about the choices of thickness.
Maybe that and alittle Indian Head shellac will get you a like new one?

 

[angus67]

is it a cam style neck? you can get that style cap with a rubber ring under ten bucks. just make sure you get one that breathes

 

[davem222]

It's a brit style cap w/ an internal spring that pushes out on the cap and two indentations that hold the cap on to the bung.

http://www.lowbrowcustoms.com/index.php?l=product_detail&p=413

 

[angus67]

ah, i see.
I would get a piece of innertube, and cut it out to replace the cork. how thick is the cork.

 

[davem222]

Not very. You think the rubber would interfere w/ the venting?

 

[angus67]

no idea.

 

[weekendrider]

Vintage Speed and Sport replacements $1.25
Or buy a sheet of cork and cut your own.
A note on inner tube and eythonol.
xsjohn and I both tried inner tube as a blank gasket on petcock holes.
The gas makes the inner tube swell and look wet although it didn't leak.

 

[angus67]

looking at the picture of the cap, looks like it vents thru the center on the inside, and the outside hole is on the edge on the top. id e try it.
As far as using innertube for a gasket, I also tried to use it for a petcock gasket, and your rite, it does wierd things, but it is exposed to gas liquid all the time. A cap gasket is not. What have you got to lose?

 

[xjwmx]

In the HELP! section at parts stores, you know the blister packs that have everything from replacement window cranks to you name it. They have a large brake master cover made of rubber, the kind that's supposed to follow the fluid level down and keep air out. I think the rubber from that would stand up to oil and fuel better than inner tube.