Recently pulled the head on my 4afe and replaced head gasket, valve stem seals and piston rings. Its running great now except there is excessive ticking coming from the valve cover that gets more aggresive as the revs increase. When rebuilding the engine, some of the shims got mixed up, im thinking this is the likely cause as the valve clearances will be all messed up. Anyone have any thoughts on what my next steps should be? Is it even worth taking the cams out again? Any help is appreciated thanks.