My head builder said to make sure the valve seals were pushed down against the guides.Do the seals allways move around on the valve stem?I checked and the seals were up away from the guides,is this normal?They sure do move up and down the stem easy.Would the seal being up away from the guides let oil run down the stem that easy?I'm asking here so my head builder wont try to get one over on me.He has been super to deal with and I dont want to jump to conclusions but I also want to cover all my bases.Thanks.