General Description
EngineExternal View
GENERAL
The V8 petrol engine is a 4.4 litre, 8 cylinder, 90 degrees 'Enclosed 'V unit, with 4 valves per cylinder, operated by two overhead camshafts. The engine emissions comply with ECD3 (European Commission Directive) and US Federal Tier2 Bin 8 legislative requirements and employs catalytic converters, electronic engine management control, positive crankcase ventilation and exhaust gas re-circulation to limit the emission of pollutants. The cooling system is a low volume, high velocity system. The Engine Control Module (ECM) controls the fuel injection system, the ignition system and the Exhaust Gas Recirculation (EGR).
The cylinder block is of aluminium alloy construction with cast iron liners and a cast aluminium bedplate bolted to the bottom of the block to improve lower structure rigidity. The cylinder heads are cast aluminium with thermoplastic camshaft covers. The single-piece oil sump is also cast aluminium. The fabricated stainless steel twin skin exhaust manifolds are unique for each cylinder bank and a moulded plastic acoustic cover is fitted over the upper engine to reduce engine-generated noise.
Engine Structure
TECHNICAL FEATURES
The technical features include:
^ An eight cylinder 90 degree 'Enclosed V' configuration liquid cooled aluminium cylinder block with cast iron liners
^ Pistons are of open-ended skirt design, with two compression rings and a three piece oil control ring
^ Two aluminium cylinder heads, each incorporating two camshafts manufactured in chilled cast iron
^ Four valves per cylinder
^ Graded valve lifters (shimless)
^ Variable Valve Timing (VVT) (inlet only)
^ Top fed, 8-jet fuel injectors
^ Engine front cover manufactured from aluminium which accommodates the crankshaft front oil seal
^ Primary and secondary chains drive the camshafts
^ An aluminium bed plate
^ A cast iron crankshaft
^ Fracture-split connecting rods in sintered-forged steel
^ A twin multi-vee belt, which drives the front end accessories
^ Fabricated stainless steel twin skin exhaust manifolds
^ Electronic Exhaust Gas Recirculation (EGR) valve
^ An advanced engine management system incorporating electronic throttle control
^ Meets with the fault handling requirements, as detailed in the European On-Board Diagnostic (EOBD) III, US Federal OBD and California OBDII legislation.
ENGINE DATA
