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Home >> Jaguar >> 2017 >> XJR L >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Engine - V6 S/C 3.0L Petrol -- XJ/X351) >> Engine - V6 S/C 3.0L Petrol >> Description And Operation >> System Operation And Component Description >> Variable Camshaft Timing >> Variable Camshaft Timing Unit Schematic - Retard

Variable Camshaft Timing Unit Schematic - Retard

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To retard the camshaft timing, the ECM adjusts the signal to the VCT solenoid to move the spool valve to close the retard chamber oil passage and connect the advance chamber oil passage to the inlet oil.

Each momentary decrease of the torque acting on the camshaft causes oil to transfer from the advance chamber, through the spool valve and the retard check valve to the retard chamber, and so retard the camshaft timing.

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