Fuel Tank Pads:, Product Recommendations |
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Fuel Tank Pads:, Product Recommendations |
914_7T3 |
Aug 5 2018, 02:26 PM
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#1
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Please forgive me, I'm new to all of this! Group: Members Posts: 1,846 Joined: 3-April 17 From: Los Angeles, CA Member No.: 20,991 Region Association: Southern California |
Looking for a replacement solution to the original fuel tank pads that retain moisture and rust the tank from the outside in.
Was thinking about some type of rubber padding that may be used similar to the below. Would also like to line the top of the battery tray with it as well. Any thoughts? Waxman 2-Pack 4-in Black Rubber Pads (w/ adhesive backing) |
mepstein |
Aug 5 2018, 03:00 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,142 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I’m using self adhesive rubber. So much better than the pieces of carpet that was used originally.
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raynekat |
Aug 8 2018, 05:29 PM
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#3
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Advanced Member Group: Members Posts: 2,146 Joined: 30-December 14 From: BORING, Oregon Member No.: 18,263 Region Association: Pacific Northwest |
There's no way water should be getting on those pads. I just finished a big restoration and just put new felt pads in there.
Got some leftover felt if you need some..... (IMG:style_emoticons/default/wink.gif) |
Rand |
Aug 8 2018, 05:36 PM
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#4
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
mouse pads? (IMG:style_emoticons/default/tongue.gif)
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Dave_Darling |
Aug 8 2018, 05:53 PM
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#5
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914 Idiot Group: Members Posts: 14,974 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
It may be that water should never get on those--but it does.
I used some neoprene rubber that I bought at the hardware store. Glued it into place like the stock felt pads. Had to use two layers to get a decent thickness. --DD |
Rand |
Aug 8 2018, 05:55 PM
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#6
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
mouse pads (IMG:style_emoticons/default/laugh.gif) (cheap neoprine cut into nicely proportioned squares)
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bbrock |
Aug 8 2018, 06:28 PM
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#7
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
You guys aren't worried about the neoprene wicking moisture through capillary action between the tank and neoprene and trapping it? I think the ideal pad would be non-absorbent, but ventilated like a spun nylon or something like that.
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URY914 |
Aug 8 2018, 06:44 PM
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#8
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I built the lightest 914 in the history of mankind. Group: Members Posts: 119,619 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
The original felt pads got wet and the tank had pin holes in it. Don't use felt.
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Larmo63 |
Aug 8 2018, 07:54 PM
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#9
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Advanced Member Group: Members Posts: 4,264 Joined: 3-March 14 From: San Clemente, Ca Member No.: 17,068 Region Association: Southern California |
I used old wetsuit material (neoprene) when my tank went back in.....
https://www.youtube.com/watch?v=RdNEEzlR4pk |
bbrock |
Aug 8 2018, 08:27 PM
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#10
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I think I might go for something more like this https://www.mcmaster.com/#polyester-felt/=1e2olep. Or find some spun polyester filter material that will provide the cushion while letting the space breath. While neoprene is non absorbent, I think it would still trap moisture against the tank surface.
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mepstein |
Aug 8 2018, 08:35 PM
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#11
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914-6 GT in waiting Group: Members Posts: 19,142 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Attached image(s) |
ClayPerrine |
Aug 9 2018, 09:28 AM
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#12
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Life's been good to me so far..... Group: Admin Posts: 15,367 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Please don't use the felt again. Over the winter, we started smelling gas in Betty's car. I chased it for over a month, replacing all the fuel lines, new Tangerine fuel line kit, etc. While pulling the tank for the umpteenth time to check the lines and pump underneath, Betty noticed the felt pad was dripping. I was going to blow it off because it was raining outside at the time. She touched the felt pad stuck to the bottom of the tank, and found out it was gas. That explains why we couldn't smell gas until we filled the tank. When we put in under 5 gallons, it didn't leak, and didn't smell. (IMG:style_emoticons/default/headbang.gif)
I had to replace the fuel tank to fix it. I used rubber sheet to pad the tank when reinstalling. |
914_7T3 |
Aug 9 2018, 11:14 AM
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#13
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Please forgive me, I'm new to all of this! Group: Members Posts: 1,846 Joined: 3-April 17 From: Los Angeles, CA Member No.: 20,991 Region Association: Southern California |
I used old wetsuit material (neoprene) when my tank went back in..... https://www.youtube.com/watch?v=RdNEEzlR4pk This is why Larmo is so well loved within the 914 community! (IMG:style_emoticons/default/beerchug.gif) |
914_7T3 |
Aug 9 2018, 11:18 AM
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#14
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Please forgive me, I'm new to all of this! Group: Members Posts: 1,846 Joined: 3-April 17 From: Los Angeles, CA Member No.: 20,991 Region Association: Southern California |
So what is the consensus as to which material is more suitable, neoprene or polyester felt and what would be the recommended thickness?
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Rand |
Aug 9 2018, 12:37 PM
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#15
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
So what is the consensus as to which material is more suitable, neoprene or polyester felt and what would be the recommended thickness? It's pretty clear that felt is out and neoprene wins. Old wet suits are perfect if you can find them. Free often. Mouse pads are dirt cheap, and some may need the fabric ripped away if it could trap moisture or at least put back to back so only the neoprene touches anything. Thickness isn't super critical, think similar to original but with better material. |
bbrock |
Aug 9 2018, 12:53 PM
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#16
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I know i'm speaking alone here but I have serious doubts that a neoprene pad is solving the problem of moisture being trapped against the tank surface. It is just trapping the moisture it in a different way. If the surface of neoprene or rubber is textured to minimize the contact area with the tank, I think that would be ideal. Another option might be to smear the pads with a sealant just before dropping the tank in to prevent water wicking between the surfaces. It would be easy enough to test a neoprene pad by placing a piece of glass with a little weight on top and then spraying water on the edge so you could see how much wicks under the glass and how long it takes to dry.
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raynekat |
Aug 9 2018, 01:08 PM
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#17
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Advanced Member Group: Members Posts: 2,146 Joined: 30-December 14 From: BORING, Oregon Member No.: 18,263 Region Association: Pacific Northwest |
I know i'm speaking alone here but I have serious doubts that a neoprene pad is solving the problem of moisture being trapped against the tank surface. It is just trapping the moisture it in a different way. If the surface of neoprene or rubber is textured to minimize the contact area with the tank, I think that would be ideal. Another option might be to smear the pads with a sealant just before dropping the tank in to prevent water wicking between the surfaces. It would be easy enough to test a neoprene pad by placing a piece of glass with a little weight on top and then spraying water on the edge so you could see how much wicks under the glass and how long it takes to dry. I agree completely. If your felt pad, or whatever pad, is getting wet....you've got bigger issues. As long as your trunk seals are in good shape, why would you be getting water in and around where the felt pads lie? That part of your front trunk should be "bone" dry. If not.... (IMG:style_emoticons/default/dry.gif) |
Larmo63 |
Aug 9 2018, 01:45 PM
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#18
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Advanced Member Group: Members Posts: 4,264 Joined: 3-March 14 From: San Clemente, Ca Member No.: 17,068 Region Association: Southern California |
A) My trunk doesn't leak
B) My car is garaged C) I don't drive my car in the rain D) It doesn't rain in California anymore, anyway E) I have plenty on old wetsuits, we live at the beach F) I don't ever wash my car with water G) My car is a driver H) I don't really care |
76-914 |
Aug 9 2018, 01:55 PM
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#19
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,454 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
I know i'm speaking alone here but I have serious doubts that a neoprene pad is solving the problem of moisture being trapped against the tank surface. It is just trapping the moisture it in a different way. If the surface of neoprene or rubber is textured to minimize the contact area with the tank, I think that would be ideal. Another option might be to smear the pads with a sealant just before dropping the tank in to prevent water wicking between the surfaces. It would be easy enough to test a neoprene pad by placing a piece of glass with a little weight on top and then spraying water on the edge so you could see how much wicks under the glass and how long it takes to dry. I agree completely. If your felt pad, or whatever pad, is getting wet....you've got bigger issues. As long as your trunk seals are in good shape, why would you be getting water in and around where the felt pads lie? That part of your front trunk should be "bone" dry. If not.... (IMG:style_emoticons/default/dry.gif) (IMG:style_emoticons/default/agree.gif) Me three. I’ve never had one of those pads get wet either. Even when driving in the rain at hiway speeds. This is in an air cooled and water cooled with large front cutout. If anything I’d use a Scotchbrite Pad for a replacement. Maybe even cardboard. Any material that will breath. (IMG:style_emoticons/default/beerchug.gif) |
bbrock |
Aug 9 2018, 02:00 PM
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#20
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I know i'm speaking alone here but I have serious doubts that a neoprene pad is solving the problem of moisture being trapped against the tank surface. It is just trapping the moisture it in a different way. If the surface of neoprene or rubber is textured to minimize the contact area with the tank, I think that would be ideal. Another option might be to smear the pads with a sealant just before dropping the tank in to prevent water wicking between the surfaces. It would be easy enough to test a neoprene pad by placing a piece of glass with a little weight on top and then spraying water on the edge so you could see how much wicks under the glass and how long it takes to dry. I agree completely. If your felt pad, or whatever pad, is getting wet....you've got bigger issues. As long as your trunk seals are in good shape, why would you be getting water in and around where the felt pads lie? That part of your front trunk should be "bone" dry. If not.... (IMG:style_emoticons/default/dry.gif) I guess I'm going with the assumption that it will get wet, but does seem like the pads on a car with good seals should stay dry. It occurred to me though that condensation on a metal tank full of liquid could be an issue and where neoprene would be a big improvement over standard felt since the neoprene would insulate the tank at those spots whereas the felt would just soak it up and hold it. Regardless, I still think the best pad would be a non absorbent cushion that is well ventilated. |
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