Haven't pulled the valve cover when hot but did when cold and checked torque on the rocker arm shaft mounting bolts. Didn't see anything unusual. Did try wiggling the rockers. Earlier this summer I installed all new rockers and shaft on that side. Haven't done other side yet. Did it because the engine builder use the original rockers saying the were ok. Since they seemed a little noisy I changed them. easy enough to do. Haven't done other side yet.
