A compliance spring assembly (50, 150) for applying a biasing force to a cam side (24) of a rocker arm (20A, 20B, 20C, 20D) to bias the cam side toward an adjacent cam (14). The compliance spring assembly includes a spring guide (52, 152) having a first end configured to engage the cam side of the rocker arm and a second end configured to slidingly engage a hole (36) in a fixed mount (32) positioned adjacent the cam side of the rocker arm. A compliance spring (62) engages a lower surface of the fixed mount and a spring mount (56, 156) formed on the spring guide. The compliance spring is compressed between the lower surface and the spring mount for apply the biasing force to the cam side of the rocker arm.

In a variable valve actuation apparatus for an internal combustion engine, a rotor of a variable valve timing mechanism is fixed to one end of a camshaft by a plurality of bolts. An oil control valve configured to control hydraulic pressure that acts on the rotor is fixed to the rotor by one or some of the plurality of bolts. For this reason, by releasing fastening of the bolt that fixes the oil control valve to the rotor among the plurality of bolts that fix the rotor to the one end of the camshaft, the oil control valve is allowed to be removed from the rotor while the rotor is fixed to the camshaft. Therefore, it is not required to perform positioning for fixing the rotor to the camshaft at the time of replacement of the oil control valve.