Before you can service or repair the lifter and lash adjuster, take off the head cover and then the
Camshafts and cam follower sets which allows access to the cam followers and lash adjusters. Label the hydraulic lash adjusters so they are put back in the same place during reassembly, as they are serviced as a set. When putting in the assembly, be sure the adjusters are mostly filled with oil so the plunger doesn't go far down when pressed. Related to this, install the cam follower assemblies as well as the camshafts and cylinder head cover.