Intake Camshaft

WARNING: This page is about a different variant/trim than selected.

Fig 1: CMP Actuator System Advance Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Vane Wheel
2	CMP Actuator Housing, part of CMP actuator assembly
3	Intake Camshaft Gear, part of CMP actuator assembly
4	Intake Camshaft
5	Advance Side Oil Passage, applying pressure
6	CMP Actuator Solenoid Valve
7	Retard Side Oil Passage, relieving pressure

Oil flowing to the CMP actuator housing (2) from the CMP solenoid advance passage (5) applies pressure to the advance side of the vane wheel (1) in the CMP actuator assembly. At the same time the CMP solenoid retard passage (7) is open, allowing oil pressure to decrease on the retard side of the vane wheel. These two simultaneous actions cause the vane wheel (1) to rotate clockwise, advancing the intake camshaft up to a maximum of 40 degrees.

Fig 2: CMP Actuator System Retard Component View

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Vane Wheel
2	CMP Actuator Housing, part of CMP actuator assembly
3	Intake Camshaft Gear, part of CMP actuator assembly
4	Intake Camshaft
5	Advance Side Oil Passage, relieving pressure
6	CMP Actuator Solenoid Valve
7	Retard Side Oil Passage, applying pressure

When the oil flowing to the CMP actuator housing (2) is from the CMP solenoid retard passage (7), oil pressure is applied to the retard side of the vane wheel (1). Because the solenoid advance passage (5) is open, allowing oil pressure to decrease on the advance side of the vane wheel (1), the intake camshaft position retards.