If it was working fine before you replaced the seals then it does tend to be a clue that you either haven't replaced the seals correctly, or your original reasoning to replace the seals was wrong and something else is wrong.
So, why replace the seals? What symptoms were you curing ....
I'd just re-work what you did and see if you've made any errors, like if you used Hermetite (or a n other sealant/gasket-goo) has any of it got into an airway etc etc