Rocker Arm help

I had a small tapping noise coming from the passenger side valve cover. You couldn't hear the tapping at idle, but while driving around 1200-1300rpm, you could hear the tapping and also the car had a hard time idling. I just installed LS7 lifters back in June '08. So I proceed to pull the valve covers and afterwards, I grab a flathead screwdriver and began to tap the rocker arms from the side. All were tight except one. It moved side to side and up and down freely. I even grabbed it with my hand and raised the rocker up and down. (it was just flapping). So then I grabbed an 8mm socket and tried to tighten it, but it was already tight. So I took the rocker arm off. I turned the motor over about an 1/8 way and put the rocker on the pedestal and bolted it down and the rocker didn't move freely anymore, it was tight. I left it like that then went inside to finish watching the Giants runs over the Browns, but fell asleep afterwards. I drove my alt. vehicle to work this morning and I was just thinking while here at work. My question is once the motor makes another 1/8th turn or a full turn, will that rocker arm have the same play in it as it did before at the same position it was loose? Or should I tighten it, then rotate then motor and see if it tightens some more?

CAR: 2002 Corvette C5 MN6

[c4c5specialist]

Hi there,
I know I answered this, why are all the posts gone???
Allthebest, c4c5