Well my rockers are very noisy so I'm thinking the roller rockers need to be re torqued. I come to find out that quite a few of the pushrods are able to be rotated by hand, obviously not tight enough. But in tightening them they just won't tighten anymore(unless I use unneccessary force) but the pushrods are still loose. I've heard adding more shims may cure the problem is this true? Currently I am only using one shim under each rocker. Basically I just need to know if adding/ taking away shims will allow me to tighten these rockers all the way?