XRAY - Model racing cars

I was wondering if anybody has broken thier fuel tank once, twice, so on? I have broken 2 now both in the same place . It breaks right at the mounting "lip" on the front side of the tank. It cracks right there at the seal. This last time it was really bad. For as much as I have been running it twice really isn't that bad but its getting really frustrating when you are in first and all of the sudden your engine dies and come to find out it's because your fuel tank cracked and you have no fuel . I don't think this is a common problem due to the fact that I couldn't really find anything on it in the forum. But if anybody could give any advice on why this might be happening or if I am doing something wrong. I really want to get this figured out, I love this car and don't want to get so frustrated that I give up on it. Thanks for any help or tips!!

Sounds like something is wrong in the way it as fitted because i have never seen this before.

Did you use the rubber grommets to mount the tank ? Make sure you dont tighten the tank down too much , it should have some movement.

I'm saying if I grab the top of my fuel tank like at the cap, I can push it out toward the pipe quite easily. If it is way too tight, the tank will feel solid like it is bolted down. The center diff will prevent you from rotating it in the other direction though.

If you are running the aluminum front brace make sure you use a good steel or Ti screw and loctite the screw with blue loctite when you install it. The brace needs a lip on it so the screw doesn't take all the compression load when landing. You can also try the composite front brace as it seems to handle the shock loads from landing better.

I've broken the fuel tank when casing a jump. If you just tighten the screws enough to very slightly compress the grommets you shouldn't have a problem with that happening anymore.