Help Pee Wee tank cap .020

Thank you very much!...yes, I did the same thing that you indicate with a sheet of steel for a Cox .049, in that case the original fastening ears had broken.
I also understand that it is possible that I cannot solder or glue this one (the Cox .020) with some glue... it is a shame, it is whole, but with cracks.
Thanks again for your message!

I would grind it out a bit and use JB weld. Clean with lacquer thinner and build up a fillet around the screw boss. It will take a fair amount of time for it to fail. What's there to lose?

Thank you very much Ken, yes, I was thinking about installing JB, what is known here as Poxipol, a mixture of two components that hardens like stone and remains gray.
He also thought of jacketing each screw so that the tightening does not occur on each housing, that is, the sleeves make the effort... thoughts

So here is my idea:
1) I make 4 sleeves for screws (they prevent the plate from binding when tightening the screws).
2) clean the plate with thinner and then with alcohol.
3) I put POXIPOL - JB epoxy glue.
4) I assemble the motor so that the glue is exactly in place.
5) I wait for the glue to complete its setting process.

We'll see tomorrow if it turns out.....

Hola Mauricio!!….Your plan to save the .020 tank cap looks like a good effort…., PeeWee’s are one of my favorite engines…..One thing that will be important is that the tank seals well and does not let air enter anywhere except the fuel fill ports….On mine I use a piece of sewing thread in the groove on the tank bowl to form a gasket there…. The thread wetted with castor oil helps hold it in place during assembly …. Photo below…

For gaskets under the screw heads I use a thread formed from the fibers of a cotton ball…. Just pull some out and twist it into a thread…. Also wetted with castor oil…. The excess is cut off after assembly….

Since the thread gasket in the tank bowl added a little more thickness I use a piece of silicone fuel tube instead of the factory O ring for the venturi seal…. The fuel tube is cut slightly thicker than the factory O ring ….

Since you tank cap has been cracked your sleeves should help take some of the pressure off of the cap when the screws are tightened…..Maybe some additional gaskets would help seal…. Let us know how your project goes!!

Roberto!...thanks for the advice! So....
1) remove the back cover and place cotton threads moistened with castor oil.
2) Assemble the motor and remove the excess cotton.
3) add fuel and...ohhhh the fuel leak continues...a small amount but the leak continues.
4) I decided to start the engine and it worked very well, a few needle adjustments and everything was going very well, so I played with it for about three tanks of fuel.
5) suddenly the engine stops and then I decide to look inside the fuel tank.
6) I found that the fuel completely degraded the glue in a matter of minutes.

Conclusion, the glue does not adapt to the needs

I keep thinking then what options I have later....

Roberto and friends....I'm thinking of a glue that results from the mixture of:
Cyanoacrylate + Sodium bicarbonate
I know it hardens like stone, I wonder if it resists solvents like the fuel we use. I could even repair the ears on the Babe Bee + Pee Wee engine mounts, I'm just thinking.
Have you done tests?

Mauricio, I don’t know if you would want to consider longer screws and washers?…. Silicone  could be be used under the washers to seal…. You could again apply good pressure for the tank to seal…The only problem is that the firewall for any airplane would need recess for the screw heads…

Good idea for gaskets roddie…. Noted and filed