^^^^^^^^^^^^^^^ DEF listen to this man! The timing belt isn't the only thing to get messed up when replacing valve seals. Cam timing and valve timing are very crucial, and I recommend starting over. Assuming you did everything besides the timing belt correctly, the least I would expect to find AFTER you did it is a bent valve. Good luck man, valve seals are supposed to be sinchy, but if you don't fully understand engine and cam timing, its really hard!!