WE REMOVE THE VALVE COVERS AND ROCKER SHAFT ASSEMBLIES. WE RETORQUE THE LOWER HEAD STUDS PER THE SIZE SPECIFICATIONS. WE REINSTALL THE ROCKER SHAFT ASSEMBLIES AND TORQUE THEM TO SPECIFICATIONS. WE ADJUST VALVES TO THE PROPER CLEARANCE SPECIFICATION PER EACH VEHICLE. WE CLEAN THE VALVE COVERS AND REINSTALL THEM WITH NEW GASKETS.