Table of Contents E70 Gasoline Engines Subject Page Gasoline Engines for E70 .5 N52B30O1 Engine .5 Technical Data Comparison .6 N62B4801 Engine .7 Technical Data Comparison .8 N52B30O1 Engine Features .10 Cylinder Head Cover .10 Oil Pan .10 Crankshaft .10 Torsional Vibration Damper .10 Belt Drive .10 Camshafts .11 Valves .11 Oil Supply.12 Intake Air Control .12 H ot-film Air Mass Meter (HFM).13 Throttle Valve.13 Engine Electronics (N52KP) .13 Digital Motor Electronics.13 Generator.13 MSV80 Overview .14 N62B4801 Engine Features .16 Oil Pan .16 Belt Drive .16 Electronic Oil Level Measurement .17 Intake Air Control .17 Digital Motor Electronics.18 Generator .19 Exhaust System.20 N52B30O1 Engine .20 N62B4801 Engine .20 Cooling System .21 Cooling Circuit N52B30O1 .22 Electric Coolant Pump.22 Cooling Circuit N62B4801 .23 Fuel Supply System .24 Initial Print Date: 10/06 Revision Date: Subject Page FuelTank Volume.24 Fuel Tank Ventilation .24 Design.24 Function .26 Service Openings of the FuelTank .26 Subject Page Gasoline Engines Model: E70 Production: From Start of Production ■BIICTItfIS After completion of this module you will be able to • Describe the engines used in the E70 • Understand the engine changes 4 E70 Gasoline Engines Gasoline Engines for E70 The modem engines available at its launch are in line with the high standards the new X5 sets itself. At its market launch, the E70 available with the N52B30O1 and N62B4801 gasoline engines, representing the best engines in theirclass. The engines have been correspondingly adapted for use in the E70. This Product Information only describes the new features and changes to the already familiar systems and components. Specifically they are the following: • N52B30O1 Engine • N62B4801 Engine • Cooling system • Exhaust system • Fuel supply system N52B30O1 Engine The familiar 6-cylinder in-line engine N52B30O1 is the entry-level engine forthe E70. The N52 was introduced forthe first time in 2005 in the E90. Atthattime, the engine set new standards with its magnesium crankcase and VALVETRONIC II system. 5 E70 Gasoline Engines The engine underwent minor modifications in September 2006 and is now designated N52K. With the introduction of the N52K, modifications were made in following areas: • Cylinder head cover • Camshafts • Crankshaft • Stem diameter of exhaust valves increased to 6 mm instead of 5 mm • Torsional vibration damper • Crankcase ventilation • Hot-film air mass meter (HFM) • Throttle valve • Digital motor electronics The following systems have been adapted on the N52K engine forthe E70: • Intake system • Belt drive • Oil pan Technical Data Comparison Specification M54B30 (E53) N52B30O1 (E70) Engine type inline 6 inline 6 Displacement (cm 3 ) 2979 2996 Stroke/bore (mm) 89.6/84 88.0/85 Power output (kW/bhp) 170/231 163/260 at engine speed (rpm) 5900 6600 Torque (Nm) 300 305 at engine speed (rpm) 3500 2500 Compression ratio 10.2 10.7 Valves/cylinder 4 4 Fuel type (RON) 98 98 Firing order 1-5-3-6-2-4 1-5-3-6-2-4 Engine management (DME) MS43 MSV80 Emission standard LEV ULEV II 6 E70 Gasoline Engines N62B4801 Engine The high-end motorization at the launch of the E70 is the N62B4801 engine. The N62 engine, which was introduced with the E65 in 2001, was already fitted in the predecessor X5 E53. The reengineered version N62TU which was also introduced in the E65 in 2005 is now also fitted in the new X5. Changes have been made to the following components for use in the E70: • Intake system • Belt drive • Oil pan 7 E70 Gasoline Engines Technical Data Comparison Specification N62B44 (E53) N62B4801 (E70) Engine type V-8 90 degrees V-8 90 degrees Displacement (cm 3 ) 4398 4799 Stroke/bore (mm) 82.7/92 88.3/93 Power output (kW/bhp) 235/320 261/350 at engine speed (rpm) 6100 6300 Torque (Nm) 440 475 at engine speed (rpm) 3600 3500 Compression ratio 10.0 10.5 Valves/cylinder 4 4 Fuel type (RON) 98 98 Firing order 1-5-4-8-6-3-7-2 1-5-4-8-6-3-7-2 Engine management (DM E) ME9.2 with VVT ME9.2.3 with VVT Emission standard LEV ULEV II 8 E70 Gasoline Engines N52B30O1 Engine Features The N52B30O1 engine was introduced in the E92 in September 2006. The engine has been adapted for use in the E70. The changes and modifications to the N52K compared to the N52 and the components specific to the E70 are described in the following. Cylinder Head Cover The cylinder head cover on the N52K is made from plastic therefore steel bolts are used forthe threaded connections. The ground connection of the ignition coils is made by means of two stud bolts that are connected to the cylinder head. The crankcase ventilation is now integrated in the cylinder head cover together with the oil separator. Oil Pan The geometry of the cast aluminum oil pan has been correspondingly adapted to suit the space conditions in the E70. Crankshaft The crankshaft has a higher degree of balance (92 % instead of 83 %) in orderto reduce the load on the engine-gearbox system. Torsional Vibration Damper The design layout of the torsional vibration damper is adapted to the crankshaft. In view of the higher degree of crankshaft compensation, the first order vibrations are shifted into a higherfrequency range. The frequency range in which the torsional vibration damper is effective has been correspondingly adapted. The torsional vibration damper is designed as a composite damper. This means the rubber layerthat connects the masses is not vulcanized but rather takes the form of a rubber band. New bolts are used for mounting the torsional vibration damper. The tightening instruc¬ tions have been changed accordingly. M ixing up the bolts can result in damage to the belt drive. Belt Drive The basic belt drive has been adopted from the N52B30O1 engine in the E92. This belt drive is a single belt system and consists of a ribbed V-belt with sixV-ribs. Due to the higher load, the belt drive is designed as a double belt system if the E70 is equipped with at least one of the following options: • Active steering system • Adaptive drive • 220 A generator 10 E70 Gasoline Engines Index Explanation Index Explanation A Basic belt drive 4 Power steering pump B Double belt drive 5 Ribbed V-belt 1 Tensioning pulley 6 Torsional vibration damper 2 Generator 7 A/C compressor 3 Deflection pulley 8 ELAST drive belt for A/C compressor The main drive belt with seven V-ribs drives the power steering pump and generator. An ELAST drive belt with four V-ribs provides the secondary drive for the A/C compressor. In this case, the A/C compressor is correspondingly adapted to the modified belt drive. Only fit the ELAST drive beltforthe A/C compressor with the special tool specifically provided forthis purpose. Otherwise there is a risk of damage to the belt and the belt pulley. Camshafts In contrast to the N52, a lightweight construction intake camshaft produced in an internal high-pressure forming process is also fitted on the N52K.TO date, this type of camshaft was used on the N52 only forthe exhaust camshaft. For production reasons, cast camshafts can also be installed at the production plant. Forthis reason, the engine can befitted with any feasible combination of cast and lightweight construction camshafts. Valves The stem diameter of the exhaust valves has been increased from 5 mm to 6 mm. 11 E70 Gasoline Engines Oil Supply Electronic oil level measurement An oil quality-level-temperature sensor (QLT) is used for the purpose of measuring the oil level in the N52B30O1 in the E70. Although the QLT is a new component, it has the same functions as the previous sensor. The QLT is longerto match the geometry of the oil pan in the E70. Intake Air Control Forthe firsttime at BMW, the intake airsilencer is a fixed part of the engine. The unfil¬ tered air duct is crash-optimized. An unfiltered air resonator and a double-chamber filtered air resonator are used forthe purpose of achieving the required sound quality. Index Explanation Index Explanation 1 Hot-film air mass meter 6 Unfiltered air pipe 2 Filtered air pipe 7 Intake silencer 3 Double chambered filtered air resonator 8 Air cleaner 4 Bracket 9 Intake silencer cover 5 Unfiltered air resonator 12 E70 Gasoline Engines Hot-film Air Mass Meter (HFM) A digital hot-film air mass meter (HFM) is used in connection with the N52B30O1 engine in the E 70. This HFM is accommodated in the cover of the intake silencer. Throttle Valve The N52K is equipped with a new throttle valve. The throttle valve setting is now measured in a contactless system by means of two redundant magnetoresistive sensors. These sensors exhibit an extremely high degree of measuring accuracy. The magnetore¬ sistive sensor is already known as the eccentric shaft sensor in the VALVETRONIC system. Compared to the potentiometers in the predecessor models, these sensors in the throttle valve permit 100 times the power level. This power ensures reliable signal transferto the DME. The sensors are also non-wearing. The signal is output in analog form by one sensor in the range from 0.3 to 4.6 V and inverted by the other sensorfrom 4.6 to 0.3 V. By forming the differential value, the DM E evaluates the plausibility of the signal. A new plug connector ensures the greatest possible contact quality. In this connector, the contactforce that acts on the pins is decoupled from the plug-in force. In this way, it has been possible to increase the contactforce by 10 times of that of a conventional plug connector. Note: The connectorforthe throttle valve can be plugged on twisted overthe firstfew millimeters. The connector may then be damaged if an attempt is made to plug it in with force. Engine Electronics (N52KP) Digital Motor Electronics The engine management M SV80 is used in connection with the N52K. This system is a further development of the MSV70 and several details have been adapted accordingly. The MSV80 now has a modified connection forthe digital HFM as it requires one less pin. The connection of the throttle valve sensors has a lower input resistance. This facilitates the higher current forthe magnetoresistive resistors. The relay forthe powersupply to the fuel injectors in no longer required on the N52B30O1 in the E70. The power is now supplied via terminal 87. Generator The basic generator for the M 52B30O1 engine is the Bosch M2.5 with a rating of 180 A. The Valeo TG23 at 220 A is used for equipment variants that have a higher power consumption. 13 E70 Gasoline Engines MSV80 Overview 14 E70 Gasoline Engines Legend for MSV80 Overview Index Explanation Index Explanation D Starter 12 Battery 2 Generator 13 Intelligent Battery Sensor 3 Coolant temperature sensor at radiator outlet 14 Transfer Case control unit D Oil pressure switch 15 Electric fuel pump 5 Electric coolant pump 16 EKP relay 6 Electric fan (engine cooling) 17 J unction box control unit 7 Magnetic clutch, A/C compressor 18 CAS control unit 8 E-box fan 19 EGS control unit 9 ECM (DME- MSV80) 20 Brake light switch 10 DM-TL 21 Diagnosis connection 11 Safety battery terminal 15 E70 Gasoline Engines N62B4801 Engine Features Oil Pan The geometry of the aluminum oil pan has been correspondingly adapted due to the position of the front axle gearbox. Belt Drive The belt drive of the N62B4801 engine has been modified for use on the E70. The generator and power steering pump has been repositioned for space reasons. The belt drive has been correspondingly adapted. The belt drive is a double system as standard. The main drive for the power steering pump, generator and coolant pump consists of a ribbed V-belt with seven grooves. Index Explanation Index Explanation 1 ELAST drive belt for A/C compressor 6 Power steering pump 2 Coolant pump 7 Ribbed V-belt 3 Tensioning pulley 8 Torsional vibration damper 4 Deflection pulley 9 Lineartensioner 5 Generator 10 A/C compressor The A/C compressor is driven by an ELAST drive belt. A new feature of this system is that the ELAST drive belt is tensioned to the required value by a lineartensioner. This makes fitting of the ELAST-belt easier as no special tools are required fortightening. It is important that the procedure forfitting the ELAST drive beltforthe A/C compressor is followed precisely as described in the repair instructions otherwise the lineartensioner may be damaged. 16 E70 Gasoline Engines The exact position of the generator and of the A/C compressor is ensured by a threaded insert. It is important to precisely follow the procedure described in the repair instructions when installing the generator orthe A/C compressor. Otherwise, the belt drive may squeak and result in damage to the ribbed V-belt. Electronic Oil Level Measurement The oil quality-level-temperature sensor (QLT) is also used on the N62B4801 engine for measuring the oil level in the E70. Intake Air Control Forthe firsttime at BMW, the air intake system is fixed to the engine in the E70. Flow conditions have been optimized forthe high airthroughput rates.The intake air control is designed as a dual-flow system in orderto minimize pressure losses on the intake side. Two unfiltered air resonators, one single chamberfiltered air resonator and one double chamberfiltered air resonator are used for achieving the required acoustic qualities. Index Explanation Index Explanation 1 Unfiltered air pipe 6 HFM 2 Unfiltered air resonator 7 Intake silencer cover 3 Filtered air resonator 8 Air cleaner 4 Double chamberfiltered air resonator 9 Intake silencer 5 Filtered air pipe 10 Bracket 17 E70 Gasoline Engines Digital Motor Electronics The M E9.2.3 is a further development of the M E9.2.2. This system is equipped with a faster processor (66 MHz instead of 56 M Hz) in orderto cope with the increased scope of functions and diagnostic procedures such as OBD on CAN, wheel torque interface for xDrive. The ME9.2.3 also offers potential for the introduction offurtherfunctions in the future. ME9.2.3 Overview 18 E70 Gasoline Engines Legend for ME9.2.3 Overview Index Explanation Index Explanation D Starter 12 Safety battery terminal 2 Generator 13 Battery 3 Coolant temperature sensor at radiator outlet 14 Intelligent Battery Sensor D Oil pressure switch 15 Transfer Case control unit 5 Electric fan (engine cooling) 16 Electric fuel pump 6 Valvetronic relay 17 EKP relay 7 Valvetronic control unit 18 J unction box control unit 8 Magnetic clutch, A/C compressor 19 CAS control unit 9 E-box fan 20 EGS control unit 10 ECM (DME- ME9.2.3 ) 21 Brake light switch 11 DM-TL 22 Diagnosis connection Generator The basic generator is the Valeo TG17 with a rated current of 180 A. The Valeo TG23 at 220 A is used to coverthe power requirements of higher equipment variants. 19 E70 Gasoline Engines Exhaust System In line with the available engines on the E70, exhaust systems have been developed that comply with the more demanding requirements of this vehicle with regard to emissions, and acoustics etc. N52B3001 Engine EU4 and ULEV 2 are standard on the E70 with N52B30O1 engine. A catalytic converter with 900 cells is connected to each of the two 3-in-1 exhaust manifolds. The pipes of the dualflow exhaust system run adjacent to each other up to the intermediate silencer. The pipes have the same diameter of 55 mm. For ULEV 2, an underfloor catalytic converter is connected upstream of the intermediate silencer. The wrap-construction intermediate silencer has a volume of 5 liters. A front silencer is not fitted. The interme¬ diate silencer is followed by the crossover point designed as a pipe junction (1x75 mm). The transverse wrap-construction rear silencer has a volume of 30 liters. The right and left tail pipes pass through the bumper panel. N62B4801 Engine The E70 with the N62B4801 engine conforms to the ULEV 2 standard. The engine is fitted on both sides with a new air gap-insulated exhaust manifold with 4-into-l pipe arrangement, to which the close-coupled catalytic converters with 600 and 400 cells are connected. The dual-flow pipes of the exhaust system are separated on either side up to the intermediate silencer. The pipes are asymmetric with different length for sound engineering reasons. No front silencers are fitted. Each wrap-construction intermediate silencer has a volume of 4 liters. The transverse wrap-construction rear silencer has a volume of 36 liters. The left and right tail pipes pass through the bumper panel. Reliable compliance with the specified limit values is ensured by the engine application and the optimized monolith load which also render a secondary air system unnecessary. 20 E70 Gasoline Engines Cooling System The cooling system of the E70 is based on a modular design. The following illustration shows the components of the cooling module. The components that make up the cooling module are dependent on the installed engine and the equipment configuration. The following components in the cooling module may differ: • Electric fan (400 W/600 W) • Radiator • Engine oil cooler in side panel module (eitherfitted or not) 1) ^2) 4 5^ 6y Index Explanation Index Explanation 1 Engine oil cooler (oil to air) 5 Radiator 2 Power steering cooler 6 Electric fan 3 COoling module frame 7 Transmission oil cooler 4 Air conditioning condenser This means there are four different variants of the cooling module available forthe E70 with gasoline engines. The all-aluminum radiator operates in accordance with the familiar cross-flow principle. The engine oil cooler is mounted separate and is located in the side panel module on the left. The oil lines have a separating point with quick-release couplings to the side panel module. The gearbox oil-to-coolant heat exchanger is based on a new design with improved efficiency. Do not grasp into the fan ring when carrying the electric fan as it is easily breakable. 21 E70 Gasoline Engines Cooling CircuitN52B30O1 D ■£) ' J 0 Index Explanation Index Explanation 1 Radiator 9 Watervalve 2 Transmission oil cooler 10 Ventilation line 3 Temperature sensor at radiator outlet 11 Expansion tank 4 Thermostat, transmission oil cooler 12 Transmission cooler 5 Map-controlled thermostat 13 Ventilation line 6 Temperature sensor at engine outlet 14 Electric fan 7 Electric coolant pump (200W - Pierburg) 15 Engine oil cooler (oil to coolant) 8 Heat exchanger (for climate control) The gear oil cooler (2) is in a separate circuit in the low-temperature area of the radiator. Electric Coolant Pump The electric coolant pump forthe N52B30O1 engine in the E70 is a version of the Siemens coolant pump modified to 200 W and as known from the N54 engine. The reason forthe modification is notthe required cooling capacity but ratherthe restrict¬ ed space conditions. Forthis reason, the 200 W Pierburg pump is not used as is stan¬ dard on the N52K engine. 22 E70 Gasoline Engines Index Explanation Index Explanation 1 Radiator 9 Water valve 2 Transmission oil cooler 10 Ventilation line 3 Temperature sensor at radiator outlet 11 Expansion tank 4 Thermostat, transmission oil cooler 12 Transmission cooler 5 Map-controlled thermostat 13 Ventilation line 6 Temperature sensor at engine outlet 14 Electric fan 7 Coolant pump (belt driven) 15 Auxiliary coolant pump 8 H eat exchanger (for climate control) The transmission oil cooler (2) is designed as a low temperature area of the radiator. It is not separated from the engine cooling circuit on the N62B4801. 23 E70 Gasoline Engines Fuel Supply System FuelTank Volume The E70 is equipped with a plastic fuel tank with two chambers providing a tank volume of 85 liters. Fuel Tank Ventilation The carbon canister is larger on US models as the vapors that occur while refuelling the tank are not extracted by the fuel-pump nozzle. The vapors are cleaned by the carbon canister and given off via a dust filter into the atmosphere. There is also a diagnostic module (DMTL). Design The fuel supply system has two delivery units that are accommodated in the right and left fuel tank halves. The fuel pump (13) with prefilter (10) and fuel filter (7) are part of the right-hand delivery unit. The swirl pot including a suction jet pump (9) with non-return valve (12) and initial filling valve (11) as well as a fuel level sensor (8) complete this delivery unit. The fuel pump and filter can only be replaced together. The fuel filter is designed as a lifetime filter. The pressure regulator (21), a suction jet pump (17), fuel level sensor (19) and two non¬ return valves (18 +20) belong to the left-hand delivery unit. The lines of the three operational vent valves (22) are combined in the central constant pressure valve (Z-DHV) (27) to form one line which then leads to the refuelling vent valve (23). From here, the line leads to the fuel filler neck. From the fuel filler neck, a branch leads to the carbon canister (AKF). On the one hand, this branch is connected to the fuel tank leakage diagnostic module (DMTL) (6) and on the other hand via the purge air line (26) and the fuel tank vent valve (TEV) (25) to the engine intake system. The lockforthe service openings is new. A clip with a break-away nut ensures the correct forces are maintained in the sensitive system. The advantage is that it provides an outstanding seal. 24 E70 Gasoline Engines E70 Fuel Supply System Index Explanation Index Explanation 1 Engine aircleaner 15 Return line 2 intake manifold 16 Feed line 3 Fuel injectors 17 Suction jet pump 4 DM-TL 18 Non-return valve 5 Dust filter 19 Fuel level sensor 6 Purge canister 20 Non-return valve 7 Fuel filter 21 Pressure regulator 8 Fuel level sensor 22 Breather valve 9 Suction jet pump 23 Refuelling vent valve 10 Intake mesh filter 24 ECM (DME) 11 Initial filling valve 25 F uel tank vent valve (purge valve) 12 Non-return valve 26 Purge air line 13 Electric fuel pump 27 Central constant pressure valve (Z-DHV) 14 Compensating line 28 Feed line to engine 25 E70 Gasoline Engines Function The fuel pump (13) with intake filter (10) delivers the fuel directly into the fuel filter (7). The fuel then flows via the feed line (16) and a non-return valve (20) to the pressure regulator (21). The task of this non-return valve is to ensure that the feed line to the engine (27) does not run empty when the engine is turned off and thus secures the pressure in the feed line to the engine. The pressure regulator (21) ensures a constant pressure in the feed line to the engine and therefore also at the fuel injectors (3). Surplus fuel is conveyed by the pressure regulator along a return line (15) back into the swirl pot. A line branches from the feed line (16) forthe purpose of feeding the suction jet pump (17) in the left-hand tank half. This pump conveys fuel from the left-hand tank half via the compensation line (14) into the swirl pot. A non-return valve (18) from the suction jet pump (17) prevents the right-hand fuel tank emptying via the feed line (16) when the vehicle is parked on a slope. A line from the fuel filter leads directly to the suction jet pump (9) that fills the swirl pot. A non-return valve (12) upstream of this suction jet pump ensures that the swirl pot and the fuel filter are not emptied via the suction jet pump when the vehicle is parked on a slope. In the event of the swirl pot being completely empty, the initial filling valve (11) ensures fuel enters the swirl pot while refuelling. Ventilation of the fuel tank is ensured by three operational vent valves (22), the central constant pressure valve (Z-DHV) (27) and the refuelling vent valve (23). The three lines lead from the operational vent valves (22) to a manifold, i.e. the central constant pressure valve (27) and from here one line leads to the central refuelling vent valve (23). The central constant pressure valve also assumes the function of preventing overfilling. The refuelling vent valve ensures ventilation while refuelling. The fuel vapors are routed up to the filler pipe where they join the vapors that occur in the filler pipe while refuelling and then directed to the carbon canister (AKF) (6). Here, the air is separated from the fuel constituents. The air is given off via the fuel tank leakage diagnostic module (4) and a dust filter (5) into the atmosphere. The fuel con¬ stituents are fed via the fuel tank vent valve (25) to the engine intake system (2). Service Openings ofthe Fuel Tank The service openings feature a new lock system. The reason for introducing this system is to provide an improved seal to conform to stringent US emission laws.The service opening is closed off with a tensioning clip that must be tightened to a defined torque. This is achieved in the production plant by using a special tightening tool. As it is difficult to access, the tensioning clip has a break-away nut for service purposes. The tensioning clips and seals ofthe service openings must be replaced every time the system is opened. 26 E70 Gasoline Engines 27 E70 Gasoline Engines