Grounding gas tank?

AnthonyG

AnthonyG

Well-known member
Sanity check.Do the clinch nuts on the gas tank ground it? No extra grounding other than that discovered on disassy.
 
The clinch nuts have to be directly connected to the frame with no paint in between. I always like to add a separate ground wire directly to the frame, myself.
 
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Remember, paint is the main cause of bad grounds. We all build our cars with beautiful paint jobs and when we put the car together can't figure out why our electrical system doesn't work!
 
Tanks been in for a month of cruising, instead of using the sending unit screws which have no seize on them anyway I'll pull one of the mounting bolts and scrape the paint where tank and frame meet, put a dab of conductive grease and re-install to be sure.
Thx
 
Anthony.....

I had replaced the old Gas Sensor and could not get it new one to work at all. I found the old ground wire that was attached to the frame. Took it off and ground the frame a bit and cleaned the wire connection and used a star washer as Franklin mentioned. Turned on the key and bingo....works great.

Mike
 
Could this be the problem with the gas gauge in my '36? The needle goes up and down and seems to hunt around the whole time while driving. Come to think of it, the oil pressure gauge does the same thing in unison with the rise and fall of the gas gauge needle, maybe my whole gauge cluster needs a better ground too??
 
Anthony is was to get the guage and sending unit to work. It may also be a safety measure too but I don't know.

Mike
 
Thx Mike, went ahead and loosened one of the mounting bolts got a thin flat jewlers file and cleaned both the rust on the frame and the paint on the tank then squirted a little conductive grease in between and re-tightened so I'm good in either case. Was just curious as the only ground on the old tank was the mounts.
 
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