Disconnect negative cable from battery.Remove spark plug wires and all spark plugs.Remove cylinder head cover(s). (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - REMOVAL).

Remove rocker arms and shaft (1). (Refer to 9 - ENGINE/CYLINDER HEAD/ROCKER ARMS - REMOVAL)Rotate engine until the piston in the cylinder bore requiring spring removal is at TDC.

Install Special Tool 8453 (1) to the cylinder head. Tighten the attaching bolts to 23 N·m (200 in. lbs.).Install a spark plug adapter (3) in the spark plug hole. Connect air hose that can supply 620.5–689 kPa (90–100 psi) of air pressure to adapter. This is to hold valves in place while servicing components.Locate the forcing screw and spring retainer adapter assembly over the spring requiring removal.Slowly turn the forcing screw clockwise (compressing the valve spring) until the valve keepers can be removed. Turn forcing screw counterclockwise to relieve spring tension. Remove retainer and valve spring.Repeat procedure for each cylinder requiring valve spring removal.