Camshaft Advance Control - Volvo B5254T3 Manual

Camshaft Advance Control

The oil is directed from the engine's lubricating system (C).
The position of the valve is controlled by the ECM and oil flows via the vents in the piston into the valve
in the camshaft oil duct (A).
Oil flows via oil ducts in the camshaft to the top of lock pin (2). The lock pin is pressed in by the oil
pressure and the CVVT unit is released.
Chamber (A1) fills with oil. Due to the oil pressure in the chamber, the rotor (3) rotates
counterclockwise.
Return oil flows from chamber B1 via the camshaft duct (D) to the valve and back to the oil pan.