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Fuel Tank Grounding; GROUP 12 FUEL SYSTEM
Topic Started: Mar 11 2009, 11:18 PM (840 Views)
kenneth f.
Member
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i have a 1963 3b the fuel tank is factory i am haveing the tub rebuilt and the inside rhino lined should i put a ground strap to the tank i know you are not supposed to refill gas containers in a truck with a rhino lined bed due to static .and the strap that holds the tank down has a nylon strap between it and the tank to make a snug fit . any thoughts thanks
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RamblinCJ3B
Member
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Just do not Line-x the area where the tank sits.
Eddie
Clovis,Ca
1956 Willys PU
1962 USN CJ3B Stock
1971 Hurst Jeepster 350
1972 Commando 4.0 HO
1972 Commando I6 258
1975 J20 401
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Bryan
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Member
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I haven't heard about the static issue, but one of my tub plans is to rhino line the bed, and one of the main reasons was to prevent the rot under the tank area from water that can sit there after a wash down. That's the only place on my whole tub that has rust- the bottom pan under the tank and the short vertical piece behind the tank.

Regarding the static buildup, I've had a plastic tank for about 15 years now, so no worries about that. But, I have a separate ground wire run to the fuel level sending unit so it would work. I would think that would work for a steel tank insulated from the body too.
1954 CJ3B...Original: F-134, T90, D18, Front and rear axles, Ross steering, Harrison heater, all body parts
Replaced parts: Carter YF938SD.
Upgrades: Front disc brakes (77 CJ5), rear 11" brakes (early 70's Wagoneer), dual master cylinder (Herm), roll bar, seat belts, custom wiring harness w/ turn signals (me), Carter glass bowl fuel filter, Tightsteer.
3rd generation of original owner
South central KY
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COPPERSWILLY
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Copperswilly
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If you feel unsure just put a grounding strap with bolt clamps on the metal of the tank and on metal of the body. You can get clamps like these at a refrigeration supply house or maybe even a hardware store. They are made of brass and you can use a copper wire as the strap.

I' saw a lady set her car on fire at the local gas station one day. All she did was get out of the car grab the pump and stick it in the tank and POOF it was on. It was the first time I'd ever seen that happen. The fire was contained to just the nozzle and fill area. I yelled to leave the nozzle in the tank which she did. Another guy did a quick blast from the fire etinquisher and it was out. The fire didn't hurt anything not even her paint.

Ever since that day I grab my vehicle and touch the knozzle to the body before it goes in the tank...they have those fires on TV all the time.

Static electricity can reach up to 20,000 to 25,000 volts on your body...saw that on TV
Chris .... MD
54 cj3b OIIIIIO
62 cj3b OIIIIIO
74 cj5. OllllllO
49 Bantam TC3
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Rus Curtis
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As Chris mentioned, static electricity is generated by friction. The danger with gas cans sitting in a truck bed with a liner is they move around and develop this static and will discharge at the worst time: during refueling. Setting the can on the ground discharges the static safely. There are warnings not to get back in your car while refueling as you generate static with the seat. Always grounding yourself is a good idea.

Liner between the tank and floor will protect the metal. The ground wire (wherever it is connected - back under the dash, behind the tank on the body, under the seat, etc) as long as it has good metal contact will not only make the tank float work but provide adequate ground for the tank.

In the past I've wondered how the original tanks were grounded. My conclusions, whether right or wrong, if properly installed; rubber grommet around filler neck, anti squeak under tank strap and under tank - it is virtually insulated. Once power is applied through the tank float wire to me the only pathway left is through the gas line where it is attached via clamp under the body. A ground wire would seem to be a good backup.
Rus Curtis
Alabama
'54 CJ-3B "Green Gruntt"
Bantam T3-C
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Lawrence
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Lawrence
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I would think the copper tubing from the tank to the fuel pump would provide a suitable ground as it is attached to the frame at points between the tank and pump.

Lawrence
1955 CJ3B
Family Tradition
Decatur, AL
~~"Seen it all, done it all, can't remember most of it"~~
~~"We cannot direct the winds but we can adjust our sails"~~
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