Grandpa's M37

[greeno]

I gave up on electrolysis last week after two weeks of cooking. It did a pretty good job of cleaning the tank between the baffles; but outside of the baffles still looks nasty. This process works by 'line of sight' so there was no chance of it working behind the baffles.

I had a radiator shop boil it over the weekend and I'm picking it up in the morning. I'll post my results....

 

[greeno]

Well...the guy didn't charge me because he didn't make it any better. Looks like i'm into either cutting it open and sand-blasting or a whole new tank. Bummer.

 

[SteveKuhn]

Alternatives: Vintage Power Wagon offers rebuilds already done or can redo yours. There's also www.[B]gastankrenu[/B].com/‎ or the POR-15 treatments. I'm not sure if I read it here or on G741, but tumbling with pennies as an abrasive can be done. Seems like it would lead to tired arms, but . . .

With a little ingenuity, perhaps you could figure a way to position and secure the ground rod inside the tank so that you get line of sight in the spots missed.

Steve

 

[nhjohnny1]

If its rust acid will take it out, just need to be careful, I cleaned mine with hydrocloric followed by phosphoric to grey the metal, cleaned great but the phosphoric was to diluted so I got flash rust, also i dont thing it got the top of the tank well as im still getting some fine rust in the filter.

 

[SteveKuhn]

As I recall, you weren't trying to keep the truck 100% stock. There are a couple of threads on G741 and I recall at least several modern gas tanks that will fit with only a little fiddling with the fuel connections. Since it's out of sight, this could be a very good $125 or so alternative. I've been considering doing it myself to get the truck functional while kicking the cost of the original tank fix down the road.

Steve

 

[greeno]

What a great weekend! Thought I read somewhere that strapping a tank to a cement mixer was the trick. Let me tell you: it was. I had the boys dump about a gallon of pea-sized rocks into it and let it spin for 4 hours. See the three photos below:

1. Before
2. During
3. After!

 

[212sparky]

Have some video of that?

 

[davidhdale]

never thought of that

 

[greeno]

http://youtu.be/pC4Dt9um7_Y

 

[bbftx]

Awesome solution. Looks like it came out great.

 

[Rusty1340]

What a great weekend! Thought I read somewhere that strapping a tank to a cement mixer was the trick. Let me tell you: it was. I had the boys dump about a gallon of pea-sized rocks into it and let it spin for 4 hours. See the three photos below:

1. Before
2. During
3. After!

View attachment 435936View attachment 435937View attachment 435938

Way better then rolling it around in the yard. That works great I done several motorcycle tanks this way. But the cement mixer was genuine for sure.

 

[greeno]

10 years later...i almost made it to the parade this year. Blew out a frost plug 5 days before the parade and couldn't get it started. TLDR, you can see my build over at g741.org. But here is a picture just for fun.

 

[Johnbyrdgates]

green,
When my fuel filter kept plugging, it turned out to be rusted fuel lines. If the truck sat for 15-20 years, there was plenty of time for your lines to rust inside. Mine looked great on the outside right up until I could see the inside from the split that developed. Ethanol s#$&s, too, so try to find ethanol free gas. Cute little tyke in the picture!