Thermoquad Wanted
They warp. If the engine becomes very hot, or the conditions around it become hot and you enter a cool area quickly after shut off, it may warp.
I had one warp and one crack.
Warping can possibly be handled by a sanding of the surface to square it up. I was lucky to catch it before it became a big problem.
Small cracks leak gas and can be patched with JB weld. Been there done that it still works 5 years running, not everyday, but alot. Will JB weld last? I don't know.
If the crack runs under the plastics bottom inbetween itself and the throttle body, you may have a permanet failure. That surface must be a clean mate. JB weld inside the bowl may work. I have not tried that yet.