Express 1500 RWD V8-5.3L (2008)
The CMP actuator magnet (752) is located in the engine front cover and is sealed by a gasket (753). The CMP actuator magnet is controlled by a 12-volt
pulse width modulated signal from the ECM. When energized, the solenoid uses electromagnetic force on the magnet pintle to position the spool valve of
the CMP solenoid valve.
CMP Actuator
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).
