Variable Camshaft Timing (VCT) Actuators

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

ITEM	DESCRIPTION
1	Exhaust camshaft VCT actuator
2	Inlet camshaft VCT actuator

The timing of the inlet and exhaust camshafts can be adjusted independently by an electro-hydraulic controlled VCT system. The ECM controls the system using information from the CMP sensors and the CKP sensor.

The VCT actuators are located on the end of each camshaft and are secured with diamond friction washers and bolts to threaded holes in each camshaft. No keyway is used to maintain the timing of the VCT actuator to the camshaft position, the diamond friction washers lock the actuator in position. The friction washers can only be used once and must be replaced if the actuators are removed.

The VCT actuators are operated by VCT solenoid valves. The solenoid valves are controlled by the ECM to control the flow of pressurized engine oil to the actuators.