I have a delta bath/shower faucet that was leaking pretty good. Ichanged the grommets and spring even the stems on the hot and cold.. It keeps coming out or something .the hot side keeps eating up the grommets for some reason could someone honened out the seats now they won't seal the rubber grommet or what

I have a delta bath/shower faucet that was leaking pretty good. Ichanged the grommets and spring even the stems on the hot and cold .. It keeps coming out or something .the hot side keeps eating up the grommets for some reason could somone honened out the seats now they wont seal the rubber grommet or what

If this is your mixing valve.(see image) and some one has enlarged the receptacles the seats fit into then you must replace the faucet, Good luck, Tom