2010 JAGUAR XFR Workshop Manual

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Page 857 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Cylinder head 2 Gasket 3 Heat shield 4 Gasket 5 Exhaust manifold 6 Bolt (8 off) 7 Heat shield 8 Bolt (4 off) 9 Spacer (8 off) The high SiMo (silicon molybdenum) cast iron exhaust manifolds are uniqu

Page 858 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Inlet camshafts 2 Exhaust camshaft 3 Inverted tooth timing chain 4 Nylon chain guide 5 Auxiliary chain tensioner 6 Auxiliary drive chain 7 Oil pump drive 8 Auxiliary drive camshaft 9 Timing chain te

Page 859 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 VCT units 2 Intake camshaft VCT solenoid 3 Camshaft position sensors 4 Exhaust camshaft VCT solenoid The VCT system varies the timing of the intake and exhaust camshafts to deliver optimum engine po

Page 860 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Bolt (3 off) 2 VCT unit 3 Filter 4 Camshaft 5 Inner plate 6 Housing and sprocket 7 Rotor assembly 8 Reed plate 9 Spring and lock pin 10 Spring (3 off) 11 Tip seal (3 off) 12 Spring (2 off) 13 Tip se

Page 861 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 16 Bias spring 17 Snap ring 18 Reluctor ring 19 Center plate 20 Snap ring 21 Screw (6 off) 22 Spool valve 23 Outer plate Each VCT unit is attached to the camshaft by three bolts. A rotor assembly and

Page 862 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Variable Camshaft Timing Operation When the engine is running, the compression and expansion of the valve springs causes momentary increases and decreases in the torque acting on the camshafts. Th

Page 863 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Advance chamber 2 Retard chamber 3 Sprocket housing 4 Rotor assembly 5 Lock pin 6 Sleeve 7 Engine oil supply from camshaft 8 Inlet check valve 9 Lock pin drain 10 Spool valve 11 Advance check valve

Page 864 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Variable Camshaft Timing Unit Schematic - Advance To advance the camshaft timing, the ECM adjusts the signal to the VCT solenoid to move the spool valve so that the advance chamber oil passage is
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