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Home >> Jaguar >> 2012 >> XKR 2D Coupe >> Repair and Diagnosis >> External Pages >> Different car >> Section 95 (Engine - V8 N/A 5.0L Petrol -- XK/X150) >> Engine - V8 N/A 5.0L Petrol >> Engine >> Description And Operation >> Valve Train >> VCT Operating Ranges

VCT Operating Ranges

WARNING: This page is about a different car, the 2015 Jaguar XK, 2014 Jaguar XK, 2013 Jaguar XK, and 2012 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
CAMSHAFT VALVE OPENS VALVE CLOSES
Intake - Low Lift 27 degrees BTDC (before top dead center) to 35 degrees ATDC (after top dead center) 187 to 249 degrees ATDC
Intake - High Lift 37 degrees BTDC to 25 degrees ATDC 213 to 275 degrees ATDC
Exhaust 244 to 194 degrees BTDC 6 to 56 degrees ATDC

The system consists of a VCT unit and a VCT solenoid for each camshaft. The ECM (engine control module) controls the system using PWM (pulse width modulation) signals to the VCT solenoids.

The torsional energy generated by the valve springs and the inertia of the valve train components are used to operate the system.

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