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06-28-2022, 06:11 PM
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#1
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Senior Member
Join Date: Sep 2020
Posts: 1,454
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Why do we never hear about rv fuel tanks rusting through?
Mufflers rust through
Exhaust rust through
Frame rust through…
Radiators rust through…
Oil coolers rust through…
Charge coolers rust through…
Yet I haven’t seen 1 post on rv fuel tanks (diesel or gas) springing a leak…
Why is that?
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06-28-2022, 06:57 PM
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#2
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Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 5,126
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Thicker metal.
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06-28-2022, 07:01 PM
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#3
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Senior Member
Join Date: Sep 2020
Posts: 1,454
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Quote:
Originally Posted by Jim_HiTek
Thicker metal.
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Than a frame?
Or exhaust?
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06-28-2022, 07:03 PM
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#4
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,311
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A lot of class Cs and gas Class As have plastic tanks .
Those with steel tanks are usually THICK metal , to avoid the need for internal bracing .
Diesel fuel tanks , even contaminated with water , would not rust through the tanks 1/4" steel ; in my life time anyway.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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06-28-2022, 07:04 PM
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#5
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Senior Member
Winnebago Owners Club
Join Date: Jan 2017
Location: Las Vegas NV.
Posts: 804
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Are they galvanized or lined ????
__________________
Robert, Sami and our owner and boss Peanut.
2017 Winnebago Vista LX 35F. 5 Star Tune, Hellwig sway bars, Super Steer Trac Bar, 1600 Watt Solar, ARP, Spare tire carrier, Starlink, weather station, 2020 Jeep Wrangler, Ready Brute Elite.
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06-28-2022, 07:08 PM
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#6
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Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 5,126
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Quote:
Originally Posted by bpu699
Than a frame?
Or exhaust?
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Yes on the exhaust. But the frame, no, however, I've never seen or read of an RV frame that actually rusted through. They should take a few hundred years for that but it can be accelerated if you drive your RV around the rust belt in winter, it would still take decades, or so I've read and seen. Sheet metal? Yeah, that'll rust through in a few seasons, but the tanks are thicker. And often positioned in such a way as they won't receive a lot of road liquid while driving. Forward and centered between the wheels for example.
I will be interested in seeing any frame rust through pictures you may have.
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06-28-2022, 07:08 PM
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#7
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,311
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Quote:
Originally Posted by bpu699
Than a frame?
Or exhaust?
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Haven't heard about frames rusting through .
Would you buy a muffler that weighed 350 lbs ,It'll last .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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06-28-2022, 11:32 PM
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#8
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Aug 2015
Location: Memphis, TN
Posts: 4,309
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RUST only comes from water and ethanol mix usually allows small amounts of water to mix w/ the ethanol and move on thru system and be burned vs sitting in bottom of tank. ONE of the ONLY benefits of ethanol. (IMHO) Another is that EPA rules now seal fuel systems vs vented to atmosphere in 20s to 1970s? This minimizes CONDENSATION compared to old days/ old ways/ old tanks, (both underground and vehicle)
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(TerryH.) 2000-GS Conquest Limited 6266 Class-C 99-E450SD V10
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06-30-2022, 09:58 PM
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#9
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Mine is aluminum
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07-01-2022, 02:36 PM
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#10
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Senior Member
Join Date: Oct 2018
Location: PA
Posts: 232
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About 15 years ago, on my previous RV (a Class C built on a 2002 Ford F450) I was filling up with gas one day, and toward the end of the fill-up, I noticed gas was streaming onto the ground. Since the chassis was still under warranty, I took it to a Ford dealership that worked on larger vehicles. They dropped the tank and found that it was rusted through at some bolt on the top (or something like that). They replaced the tank and the warranty covered everything. That incident was one of a few that made me think it might have sat in minor flood waters for a time before I purchased it. I'm sorry I don't have any pictures, but if I'm recalling correctly what I was told, this might be an example of a gas tank actually rusting through.
__________________
2013 Fleetwood Bounder 35K
Koni shocks, Roadmaster front sway bar, CHF (rear), rear track bar, 5-Star Tune
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07-01-2022, 02:46 PM
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#11
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Senior Member
Join Date: May 2018
Posts: 3,157
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I haven't owned anything with a metal tank since the seventies, I just asumed most were plastic by now. I do remember issues with older F-450 and 550 trucks where the metal tanks were lined inside and the lining would de-laminate and lead to clogging issues. My Dad bought a brand new one in the eighties that had sat on the lot for a long time in the Northern Illinois cold winter, with next to no fuel in it. Both tanks had to be replaced.
Do those of you with the large 100+ gallon tanks have steel tanks? Even on the newer ones?
__________________
Brian, 2011 Winnebago Via Class A on Sprinter Chassis
2000 Jeep TJ toad
Tucson, AZ
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07-01-2022, 02:50 PM
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#12
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Senior Member
Join Date: Aug 2019
Location: MN
Posts: 2,809
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Back in the '70's, I had many rusted pinholes in car gas tanks. I always had some of that two-part epoxy gas tank repair putty with me. But I also had many cars with horrible rust throughout the metal bodywork.
Metal treatment is so much better now. Even in Minnesota - land of road salt - it's rare to see a badly-rusted body on a post-80's car.
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1993 Rockwood 28' Class C - Ford E-350 7.5L
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07-01-2022, 03:24 PM
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#13
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Senior Member
Join Date: Jul 2005
Posts: 5,996
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'79 Ford PKP truck gas tank with pinhole corrosion midway underneath mounting strap. PA vehicles bathed in salt every winter.
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TandW
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07-01-2022, 06:14 PM
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#14
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,655
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Quote:
Originally Posted by THenne1713
RUST only comes from water and ethanol mix usually allows small amounts of water to mix w/ the ethanol and move on thru system and be burned vs sitting in bottom of tank. ONE of the ONLY benefits of ethanol. (IMHO) Another is that EPA rules now seal fuel systems vs vented to atmosphere in 20s to 1970s? This minimizes CONDENSATION compared to old days/ old ways/ old tanks, (both underground and vehicle)
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If they are truly sealed, how does outside air enter the tank as fuel level lowers?? If no outside air can enter, the fuel pump would eventually pull a vacuum in the tank.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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