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08-10-2022, 03:44 PM | #1 |
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Gas gauge gaskets
Hi I can’t remember but do I use sealant on the gaskets for the gas gauge?
Mike
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08-10-2022, 03:47 PM | #2 |
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Re: Gas gauge gaskets
Red book sez, "Do not use sealant on either of the sight glass gaskets."
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08-10-2022, 04:26 PM | #3 |
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Re: Gas gauge gaskets
After reading lots of older posts and getting current advise, I used a little bit of Maple Syrup on mine and it worked fine. The consensus seems to be that the maple syrup reacts with gasoline to form a leak-proof seal. Your experience may vary!
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08-10-2022, 05:04 PM | #4 |
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Re: Gas gauge gaskets
A little grease!
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08-10-2022, 05:22 PM | #5 |
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Re: Gas gauge gaskets
Interesting. I put mine together a year ago and it leaked IIRC. I vaguely remember talking to Ken Ehrenhofer who said to put some of the black sealant on. I could be mistaken but pretty sure it was him. I did and it worked great.
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08-10-2022, 06:17 PM | #6 |
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Re: Gas gauge gaskets
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08-10-2022, 06:18 PM | #7 | |
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Re: Gas gauge gaskets
Quote:
Also , thinking ... Maple syrup if you live up north and molasses for the folks down south. A suspect that any sealant that is hydrocarbon based will eventually fail after long time emersion in gasoline. Joe B |
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08-10-2022, 06:54 PM | #8 |
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Re: Gas gauge gaskets
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08-10-2022, 07:02 PM | #9 | |
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Re: Gas gauge gaskets
Quote:
I think your suspicions are unfounded, fortunately.
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08-10-2022, 07:10 PM | #10 |
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Re: Gas gauge gaskets
Thanks, it has been so long since I had to change out the float I could not remember.
Mike
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08-11-2022, 08:50 AM | #11 |
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Re: Gas gauge gaskets
I put in a new float last season only with the supplied gaskets in the kit...no leaks yet!
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08-11-2022, 09:32 AM | #12 |
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Re: Gas gauge gaskets
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08-11-2022, 10:17 AM | #13 |
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Re: Gas gauge gaskets
I changed it out and will fill it up tonight to check for leaks. And yes I don't trust neoprene gaskets to save my life.
Mike
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08-11-2022, 10:23 AM | #14 |
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Re: Gas gauge gaskets
The secret to prevent a leak is to use additional brass rings.
Tom Endy https://www.santaanitaas.org/wp-cont...uge-Repair.pdf |
08-11-2022, 10:24 AM | #15 |
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Re: Gas gauge gaskets
Nitrile rubber also know as Buna-N or Butadiene was developed before WWII for use in seals and o-rings for petroleum products and aeromatic hydrocarbons or fuels. It is still used for some applications in aviation but has been slowly replaced by fluorocarbon and fluorosilicone elastomers with the latter being most common for fuels. These types have over 20-year shelf life capability so the change over in aviation was for that reason. Fluorocarbon elastomer is also known as Viton as a trade name but patents expired years ago.
Cork gaskets are generally granulated pieces of cork bonded together by some form of elastomer so not all cork gaskets are good fuel gaskets. Neoprene or polychloroprene is an elastomer that is very hard and durable after it has been vulcanized. It's good for oils, alcohols, and a few other mild solvents but not so good with modern gasolene. If the cork is bonded with neoprene then it may not last long. If it's bonded with nitrile rubber then it should be OK. The problem is that it is difficult to tell what the bond material is since they both look alike. |
08-11-2022, 11:36 AM | #16 | |
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Re: Gas gauge gaskets
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08-11-2022, 12:09 PM | #17 |
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Re: Gas gauge gaskets
I use a little grease also. I don't like using any sealant if I don't have to. It just makes it hard on the next guy (probably me!) to get it apart and cleaned up next time That is what the gasket is for.
I use Buta-N/cork gaskets.
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08-11-2022, 12:43 PM | #18 |
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Re: Gas gauge gaskets
I use cork gaskets with a thin coating of Hylomar Universal Blue on each side. I also use (as Tom E suggests) two brass rings to allow slippage between them as the ring is tightened. 100% success.
It's also important to get the back (sealing) side of the glass thoroughly clean and smooth. Putting it in with even the slightest amount of residue (like from the last guy that put it together with Permatex ;-) ) is tempting fate. JayJay
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08-11-2022, 08:05 PM | #19 | |
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Re: Gas gauge gaskets
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08-12-2022, 07:08 AM | #20 |
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Re: Gas gauge gaskets
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