Neoprene

4x4M38 · Post by **4x4M38** » Tue Mar 31, 2015 8:53 pm

I am planning on using neoprene for the
gas tank anti-squeak material. Webbing makes
no sense as I am not doing a factory resto,
and that stuff will only hold moisture under
the tank and on the floor.

Wondering if it is reasonable material for
the gasket material under the sender and
fuel pickup plates?

Post by **wesk** » Tue Mar 31, 2015 10:31 pm

I have run across several fuel tank sender gaskets that over the years have been upgraded from cork to rubber or other manmade petroleum based gaskets. If you use slippery rubber or neoprene gaskets do not coat them with anything. They will ooze out from under the flanges between each pair of screws and eventually leak. Keep everything clean and dry during assembly.

When you position the tank support strips on the tub floor be sure to lay them out so water cannot be trapped in between them. That way if she gets rained in on a skinny air nozzle on the air hose will dry the floor quickly.

eagle64 · Post by **eagle64** » Wed Apr 01, 2015 6:58 am

I was checking out the neoprene on line. and it comes in many different thickness's I think it was from 1/32 to 1/4 inch. I was thinking of using it under the tank and under the strap, how think should a person use in this application?

4x4M38 · Post by **4x4M38** » Wed Apr 01, 2015 8:40 am

That's what I was thinking Wes. Front to back to allow water to get
to the drain.

I believe the factory stuff was 1/8" thick.

Post by **wesk** » Wed Apr 01, 2015 9:13 am

This is a good example for when you need more than just the ORD 9 SNL G-740 or ORD 9 SNL G-758 to determine stock dimensions. In this case the ORD 8 for these two jeeps actually add's the field approved replacement material for the Ant-Squeak originally installed by Willys. Webbing, anti-squeak, cotton 27-W-11185 1" wide & 3/16" thick. Since the webbing will compress much easier than neoprene I would suggest 1/8".

You will need 5 strips of it;

1 - 6 3/8"
3 - 18 11/16"
1 - 24 5/8" (for hold down strap)

timjuhl · Post by **timjuhl** » Thu Apr 02, 2015 2:54 pm

How about silicone such as aircraft baffle material for under the tank? I would think it would resist fuel better than neoprene, especially with fuels blended with alcohol or certain other aromatics.

Tim

4x4M38 · Post by **4x4M38** » Thu Apr 02, 2015 4:04 pm

Yes Wes, I was thinking 1/8" thick material.

Tim, that is why I am asking. I was thinking neoprene was a better choice than plain rubber, but have no data for either when it comes to alcohol infested gasoline.

Post by **wesk** » Thu Apr 02, 2015 9:56 pm

Actually Neoprene is much better at fuel resistance than silicon. Silicone is the stepchild of the new generation just because the new generation believes it to be a new material. As a professional mechanic I find silicon in way too many places it does not belong. Engines and oil and fuel containment systems are not a good place for silicon. Only the manufacturers and purveyors of Silicon products make such rediculous claims.

Maybe a little study will help with your choices.

http://www.dkirubber.com/materials.asp

timjuhl · Post by **timjuhl** » Fri Apr 03, 2015 11:02 am

Wes,
The linked discussion in your last post is a nice summary of the available materials. I bookmarked it for future use.

Thanks!
Tim

Post by **wesk** » Fri Apr 03, 2015 9:32 pm

Glad you found it interesting Tim. One of the most dangerous places you find silicon is in gaskets and other surfaces in engine oil systems. When it breaks down and starts to peel away the silicon plugs up oil passageways often destroying engines.

Neoprene

Neoprene

rubber under the tank

Anti-squeek