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#1 |
Registered User
Join Date: Jul 2015
Location: Sedalia Mo.
Posts: 1,131
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What ate the fuel sender float?
I've only pulled a few fuel sending units in my life, all pre-72 and all brass floats, but I've never seen one like this. It looks like brass. The edges of the hole are very thin and would be sharp if it was not so thin.
I've had the truck since 1995 and drove it for a few years back then. The fuel gauge worked then, but since then the tank has had 87 octane in it mostly setting in the garage waiting "for the day". Needless to say, it's getting replaced and the tank will get cleaned out an maybe epoxied (it's speckled with light rust). While were talking sending units....Any suggestions as who sells the good stuff? BUT, What happened here?...
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He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20 |
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#2 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: What ate the fuel sender float?
stuff deleted.
I'll venture a guess on what ate it. Does your state mandate ethanol in your fuel like mine does? Most states do. I've heard many different stories on how ethanol doesn't hurt what you have unless you let it sit. I found this online: Ethanol attracts water. When the two get together, they create the perfect environment to grow a type of bacteria called acetobacter. After getting drunk on their EPA-sponsored kegger in your gas tank, the acetobacter excrete acetic acid. And acetic acid is very corrosive.Me personally, I go WAY out of my way to put "non-oxy" aka ethanol free gas in all my small engines; snowblower, weed whip, generator, lawn mowers, outboard motors, etc. I usually drain all tanks like outboard tanks when they sit all winter. In my zero turn lawnmower, which is harder to drain, I start running a product like Stabil in about September so it gets through the system before it sits. Since my truck is used little in the winter I make sure non-oxy only goes in there. Same for my Chevelles which sit a lot. AND I treat that with Stabil or Seafoam in the last fill-up before winter. My daily driver, it gets the state mandated stuff. I've never seen any ill effects from using it in there because I go through so much.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#3 | |
Registered User
Join Date: May 2011
Location: mich
Posts: 655
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Re: What ate the fuel sender float?
Quote:
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#4 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,721
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Re: What ate the fuel sender float?
So does the float leak or just look ugly? If it doesn't leak, clean it up and coat it with whatever tank sealant you plan to use, or POR-15.
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#5 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,129
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Re: What ate the fuel sender float?
Seen a lot of copper floats in my life but not like that
![]() Maybe this vvvvvv electrolysis ^^^^^^^ .
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#6 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,505
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Re: What ate the fuel sender float?
Quote:
Since it is about 1/3 gone (looking at the picture) I imagine it leaks pretty bad..... ![]() LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#7 |
Registered User
Join Date: Jul 2015
Location: Sedalia Mo.
Posts: 1,131
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Re: What ate the fuel sender float?
![]() Anybody recommend a vendor for the sending unit? With my last project (a F@rd), most of the available sending units where sketchy. It looks like the brass float is available by itself for the truck. I ohm tested the unit and this one sends out a pretty consistent 20-120 after some freshening up of the contact points. I think it should be 0-90. My gut says replace the whole thing. I'm not being cheap, but if the old ones are worth refurbishing compared to buying repop...I'm in!
__________________
He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20 |
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#8 |
Senior Member
![]() Join Date: Jun 2002
Location: Murray, Kentucky
Posts: 3,483
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Re: What ate the fuel sender float?
Here's what I used to replace the brass float.
http://67-72chevytrucks.com/vboard/s...ighlight=float
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Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203 |
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#9 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Rust! Buy a new one it should last at least 50 more years!
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#10 |
Still Green but learning
Join Date: Nov 2004
Location: Central NC
Posts: 1,895
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Re: What ate the fuel sender float?
I just redid all mine. Rep tank fuel lines sending unit fuel pump and rebuilt carb. Fuel lines are the hard part, never the right length had to clean and reuse pump to carb line. If I had to do it over again would have reused the tank to under cab line the same way.
Using that sink trap cleaner outer thingy LOL and some throttle body cleaner I got it really good and clean ithink.
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-- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was |
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