let me see if i can describe this because i don't know the exact name here. ok so i took the valve cover off and i touch the part where you tighten to do a valve adjustment...on the top it has a flat head screw driver adjustment thing where it looks like you hold it with a flat head screw driver than most likely use a tool to tighten it...does anyone know what i'm talking about? well the part underneath that is really loose...it looks like it touches the cam i'm not sure. does this mean it needs a valve adjustment? i'll try to take a picture of it to show you but maybe you guys already know the name.

 

Are you vtec or no? Non-vtec valves are a breeze to adjust with no special tools.

On visual inspection, grabbing the rockers, some will be loose and others tight, this is normal. As the cam spins, the loose ones will tighten up and the tight ones will loosen, it depends on where the lobe is on the cam. The flathead slot is what you turn to adjust the valve, and the nut underneath will hold the adjustment when tightened. So, loosen nut, use feeler gauges to measure gap, then turn the slotted screw until there is a slight drag on the feeler gauge, then tighten the nut, and recheck the gap.

Now, a valve adjustment is easy, but certain steps must be taken to do it correctly, like having each piston at TDC while adjusting the corresponding valves.
Then double check the adjustment after you tighten the nut. If you don't know what you are doing, more harm than good will come from you trying to adjust the valves.

It's funny how something so important to your engine can be half-assed by some people, so be very careful. Good luck to you.