I just replaced the valve stem seals on my 350 tbi and I am bothered by something. Before I replaced the seals, I had 175 psi on all 8 cylinders. After changing the seals, I am getting 175 psi on all cylinders except the no. 1 cylinder. It is now at 155 psi. I have adjusted the valve lash so I know its not too tight which wouldn't let the valves open. It is different than the others though. With all other cylinders, I turned the push rods while tightning the rocker nut until I felt it stop and then went another 3/4 turn. With the no. 1 cylinder I did that innitailly and got no compression so the valves weren't open. I kept loosing them a little at a time until I felt like they were way too loose and I can get is 155psi. The only way I can get 155psi is with it loose and I can turn the push rods with my finger so I know it will rattle when I crank it up and that won't work either. Does anyone know what might be wrong? All cylinders were strong before the seal change.