CMP Actuator
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The CMP actuator is a vane type design that hydraulically changes angle or timing of the camshaft relative to crankshaft position. The CMP actuator allows earlier or later intake and exhaust valve opening during the 4-stroke engine cycle. The CMP actuator cannot vary the duration of valve opening or valve lift. The CMP actuator is to be serviced as an assembly. For system operation, refer to Camshaft Actuator System Description .
The CMP actuator consists of the CMP reluctor wheel (1), pins (2), return spring (3), front cover (4), locking pin (5), locking pin spring (6), vanes and vane springs (7), rotor (8), stator (9), sealing cover/thrust plate (10), and bolts (11).