Valve Stem Seals, Removing And Installing, Cylinder Head Installed: Procedure
-- Remove the camshafts. Refer to CAMSHAFT, REMOVING AND INSTALLING .
-- Mark the allocation of the roller rocker lever and the hydraulic lifter so they can be installed again.
-- Remove the roller rocker lever with the hydraulic lifter and place them on a clean surface.
-- Remove the spark plugs using the :3122B .