Since I put the 2.1 head on my 85 SPG, I have heard a very quiet tapping sound from the pass. side of the engine. Until recently I thought it was an exhaust leak pre-manifold. Busting out the garden hose to narrow down the sound's source has led me to one of the valves/lifters/cam followers on the intake side closest to the front of the car. Now I have the valve cover off, but how do I diagnose this problem? I'm not too sure how the followers should act (ie: still have some hydraulic 'squish' when not fully compressed by the cams, etc.) Must I take out the intake cam and remove the follower to look at the lifter? What should I look for at that point? Thanks.