I reused the old one. In my case, the threads were balled up. The bolt would not come loose and the insert would spin in the tank. I used a die grinder to grind the head off the bolt to get the shroud out of the way, and not destroy it, then I pulled the insert from the tank. Once it was out I was able to drill the bolt out and tap the insert. If yours is unusable, let me know, I have a tank from a mid 90`s kx I would be willing to pull one out and you could have it.