Jaguar XJ (X350). Manual - part 312
Description and operation
Engine
The 3.0 litre 24 valve V6 engine has four overhead camshafts and are driven by two timing chains.
The engine incorporates electronic engine management with distributorless ignition system,
sequential electronic fuel injection. It also has two catalytic converters in the exhaust system which
includes two oxygen sensors and two catalytic monitor sensors.
Viewed from the driving position, the right-hand cylinder bank is numbered 1 to 3, from the front of
the vehicle and the left-hand cylinder bank are numbered 4 to 6, from the front of the vehicle.
The engine includes the following:
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Compression ratio of 10.5:1.
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3 Stage variable geometry intake manifold.
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Lightweight valve gear.
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Unique camshaft lift and duration.
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Twin knock sensor engine management control.
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Fully variable camshaft timing (VCT) system.
Variable Intake System (V.I.S).
The variable intake system consists of a three stage upper intake manifold assembly, two position
electronically driven gate valves and an engine management powertrain control system.
The engine control module (ECM) switches the intake manifold tuning valves between fully open and
fully closed at calibrated engine speeds.