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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2011 Posts: 814 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 814 | Today I removed the gas tank from my 56 Chevy. The sending unit was so badly corroded it was like a fossil. There was tons of loose stuff rattling around inside, including the pickup screen for the sending unit. I washed it out with water to get as much loose stuff out as I could. I also rattled a chain around in there for a while. Almost all of the loose stuff is now out. I'll go back at it tomorrw. I plan to clean it with muriatic acid, neutralize with baking soda and water, then use Red-Kote. As you may know from my earlier threads, the old gasoline in this truck really varnished up badly. I rebuilt the carb today after having the parts soaking in solvent for several days. I also pulled the manifolds because the intake was full of thick varnish like old maple syrup. I have that soaking now. I'm running all new fuel lines as well.
1956 Chevy 3200
| | | | | Joined: Oct 2006 Posts: 99 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 99 | I cleaned my 56 gmc tank out 10 years ago- what a job! I used a a lot of 1" stone, probably same effect as chain. The acid flushing is probably toxic waste, what with all those years of lead. I remember it took a lot of muscleing the tank around.
Well, my time went so quickly,
I went lickety-splitly
Out to my ol' 55.
As I pulled away slowly,
Feelin' so holy,
God knows, I was feelin' alive..... Tom Waits, Ol' 55
| | | | | Joined: Apr 2011 Posts: 181 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2011 Posts: 181 | When I have any fuel tank needing a clean out I take it to a local Industrial Radiator Shop who uses a dip process to clean it and then after it dries pours in a preservative and turns the tank over to assure coverage of all the side wall surfaces. It is the best way for me and so far, no problems.
Normbc9 | | | | | Joined: Sep 2011 Posts: 814 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 814 | I've decided to do the same. I just don't feel like messing with it.
1956 Chevy 3200
| | | | | Joined: Jun 2008 Posts: 1,388 Shop Shark | | Shop Shark Joined: Jun 2008 Posts: 1,388 | Ahh, here's what I've done. Take out the tank remove the send unit, put in a hundred or two hundred drywall screws. Then attatch the tank to something that turns slow, like the wheel on your tractor, go for a slow drive. I sadly don't have a tractor, so I've do it by jacking up the back of my one ton, and letting it idle in low with the tank strapped to the wheel.
I'm too-cheap to pay. I'm also too cheap to line a tank, unless it has pinholes. Even then, I'd probably just use seal-all for the pinholes. | | |
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