BMW S58 Owner'S Handbook Manual Download Page 69

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S58�Engine

8.�Intake�Air�and�Exhaust�System

S58�engine,�intake�air�system�from�above

Index

Explanation

Unfiltered�air

Clean�air

Heated�charge�air

Cooled�charge�air

Intake�snorkel,�right

Unfiltered�air�pipe,�right

Clean�air�duct,�cylinders�1-3

Clean�air�duct,�cylinders�4-6

Air�cleaner

Exhaust�turbocharger,�cylinders�4-6

Summary of Contents for S58

Page 1: ...Technical training Product information BMW Service S58 Engine ...

Page 2: ...Technical Training Centers or BMW Group Contract Training Facilities This training manual or any attached publication is not intended to be a complete and all inclusive source for repair and maintenance data It is only part of a training information system designed to assure that uniform procedures and information are presented to all participants For changes additions to the technical data repair...

Page 3: ...e Mechanical 13 4 1 Engine housing 13 4 1 1 Oil sump 13 4 1 2 Crankcase 14 4 1 3 Cylinder head gasket 16 4 1 4 Cylinder head 17 4 1 5 Cylinder head cover 18 4 1 6 Engine cover 23 4 2 Crankshaft 23 4 2 1 Crankshaft with bearings 23 4 2 2 Connecting rod with bearing 24 4 2 3 Piston with wrist pin and piston rings 26 4 3 Camshaft drive chain drive 27 5 Valve Gear 29 5 1 Design 29 5 1 1 Camshafts 30 5...

Page 4: ...7 9 1 Oil pressure 59 7 9 2 Oil temperature 59 7 9 3 Oil level 59 7 10 Service information 60 8 Intake Air and Exhaust System 61 8 1 Air intake system 61 8 1 1 Overview 61 8 1 2 Air mass determination 64 8 1 3 Tank ventilation system 64 8 1 4 Venturi nozzle pressure sensor 66 8 1 5 Carbon canister 66 8 2 Exhaust emission system 66 8 2 1 Overview 66 8 2 2 Exhaust manifold with turbocharger 68 8 2 3...

Page 5: ...em 78 10 3 High pressure fuel system 78 11 Cooling System 80 11 1 Overview 80 11 2 Engine cooling 83 11 2 1 Cooling circuit exhaust turbocharger 85 11 2 2 Charge air cooling 86 12 Engine Electrical System 89 12 1 Engine control unit 89 12 1 1 DME control unit 90 12 1 2 Overall function 93 ...

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Page 7: ...r development with a nominal output of 353 kW 480 hp compared with the 317 kW 431 hp of its predecessor The maximum torque an indicator of the power delivery and performance perceived by the driver has risen from 550 Nm to 600 Nm This has been achieved despite the fact that fuel consumption and CO2 emissions have been reduced with the aid of the BMW EfficientDynamics measures As the S58 engine is ...

Page 8: ...ical data S58 engine overall view Model Unit F80 F82 F97 F98 Engine S55B30T0 S58B30T0 Design R6 R6 Displacement cc 2979 2993 Bore hole Stroke mm 84 0 89 6 84 0 90 0 Power at engine speed kW hp rpm 317 425 5550 7300 353 473 6250 375 503 6250 ...

Page 9: ... 442 2600 5600 2600 5950 Compression ratio ε 10 2 1 9 3 1 Oil quantity l 6 5 7 Digital Motor Electronics MEVD17 2 G DME 8 6 S Exhaust emissions legislation ULEV 70 ULEV 70 Acceleration 0 100 km h s 4 3 4 1 4 2 4 1 Electronically limited With M Driver s Package SA 7ME With M double clutch transmission with Drivelogic With Competition package SA 7MN 7MA ...

Page 10: ...on 4 1 1 2 Full load diagram In comparison with the predecessor the S58 engine features lower fuel consumption with higher power and torque data Full load diagram for F82 with S55 engine compared with F97 F98 with S58 engine ...

Page 11: ...S58 Engine 1 Introduction 5 1 2 B58 S58 new features changes 1 2 1 Overview S58 engine exploded diagram Index Explanation 1 Cylinder head cover 2 Cylinder head 3 Cylinder head gasket 4 Crankcase ...

Page 12: ...nued Water chamber cross sections enlarged Crankcase ventilation gas ducting Cylinder head gasket Revised cylinder head gasket due to higher combustion pressure of S58 engine Crankcase Adapted for bi turbo No attachment for heat management module Additional oil ducts for switchable piston cooling Additional oil ducts Crankshaft with bearings Stroke increased to 90 mm Adaptation to the high speed c...

Page 13: ...in triple cams for the driving the high pressure pumps Intake valves Material change VANOS Adjusters shorter and more compact design Modified camshaft sprockets due to adapted timing chain Fully variable valve lift adjustment Optimization of work curve for the valve opening adaptation to high speed concept Intermediate lever adapted 1 New design 2 Identical concept Belt drive and ancillary compone...

Page 14: ...charger Bi exhaust turbocharger with electrical wastegate valve Mono scroll concept Air intake duct New air intake duct for use of indirect charge air cooling New clean air ducts Modified intake silencer in engine cover Exhaust system Optimized for minimal exhaust gas pressure Electrical exhaust flaps Active Sound Design ASD in the passenger compartment Sports exhaust system as optional equipment ...

Page 15: ...al coolant pump higher delivery rate and delivery head Additional electric coolant pump for exhaust turbocharger Cooling throttle body Split cooling discontinued Heat management module dispensed with Data map thermostat Low temperature circuit for charge air cooling Indirect charge air cooling with two heat exchangers Own coolant circuit Electric coolant pump 1 New design 2 Identical concept Engin...

Page 16: ... Power in kW HP at RPM Torque in Nm lb ft at RPM S52B30 US E36 2990 85 8 86 06 177 240 6000 305 4250 S52B32 US E36 3152 89 6 86 4 177 240 6000 320 3800 S54B32 US E46 3246 91 0 87 0 248 338 7900 355 4900 S55B30 US F80 F82 F83 2979 89 6 84 0 317 425 5500 7300 550 406 1850 5500 S55B30 US F87 2979 89 6 84 0 302 405 5230 7000 550 406 2350 5230 ...

Page 17: ...roup P BMW M Sport S BMW M GmbH W External developer 2 Engine type 1 R4 e g N12 4 R4 e g N43 5 R6 e g N53 6 V8 e g N63 7 V12 e g N73 8 V10 e g S85 3 Change to the basic engine concept 0 Basic design 1 to 9 Modifications e g to combustion process 4 Working method or fuel type and possibly installation position B Petrol longitudinal installation D Diesel longitudinal installation H Hydrogen 5 Displa...

Page 18: ...engine designation Index Explanation S BMW M GmbH development 5 6 cylinder in line engine 8 Petrol engine with Turbo Valvetronic direct injection TVDI B Petrol engine longitudinal installation 30 3 0 liters displacement T TOP performance class 0 New development ...

Page 19: ...55 engine An additional partition in the area of the drive shaft passages in the forward area of the sump further restricts oil movement under longitudinal and lateral acceleration forces S58 engine oil sump Index Explanation 1 Oil level sensor mount 2 Bulkhead 3 Output shaft passage 4 Oil drain plug To ensure that the engine oil in the front smaller sump is drained completely during an engine oil...

Page 20: ...t ducts and the coolant pump mounting have had to be adapted to the crankcase That involved increasing the cross sections of the water chambers in order to minimize the flow velocity of the coolant in the crankcase as much as possible due to the high delivery rate of approx 300 l min of the new coolant pump Furthermore the mounting points for the ancillary components specific to the S58 engine hav...

Page 21: ...il duct for spray nozzles 2 Engine oil return exhaust side 3 Engine coolant ducts water chamber passages 4 Coolant pump mounting 5 Intake side engine oil return and gas replacement duct 6 Cylinder liners LDS coated 7 Coolant duct coolant return to radiator 8 Oil filter module mounting ...

Page 22: ...aust turbochargers were necessary for the oil supply and coolant cooling 4 1 3 Cylinder head gasket In contrast with the B58TU engine the cylinder head gasket in the S58 engine is made up of 4 layers 3 layers in the B58TU engine because the combustion pressure is higher than in the S58 engine Furthermore the contact faces with the cylinder head and cylinder block are no longer fully coated but ins...

Page 23: ...facturing process makes it possible to produce geometrical shapes that cannot be achieved with conventional metal casting methods Thanks to 3D printing technology the cylinder head core of the new engine is lighter in weight and has optimized coolant duct routing in temperature management terms The S58 engine again features direct injection turbocharger aspiration and Valvetronic valve timing The ...

Page 24: ... 1 5 Cylinder head cover Design The cylinder head cover is a new part on the S58 engine As distinct from the cylinder head cover of the B58TU engine the mounts for the two high pressure pumps are machined into the cylinder head cover of the S58 engine All the components for crankcase ventilation and the blow by ducts are also integrated in the cylinder head cover The integrated valves ensure that ...

Page 25: ...or high pressure pumps 3 Housing chain drive 4 Mount for exhaust side VANOS solenoid valve actuator 5 Mount for intake side VANOS solenoid valve actuator 6 Particle separator 7 Blow by gas distributor rail 8 Crank case vent valve 9 Oil filler neck 10 Oil filler cap 11 Blow by gas duct 12 Through holes for spark plugs 13 Accommodates the camshaft sensor ...

Page 26: ... duct discharging into the sump below the oil level A non return valve in the lower part of the crankcase in the area of the sump ensures that no oil from the sump can pass into the crankcase ventilation system from the sump The precise procedure for removing and installing the cylinder head cover can be found in the up to date information in the BMW workshop system ISTA Operating principle The st...

Page 27: ...cts Once the pressure in the intake plenum rises it is no longer possible for the blow by gases to be introduced via this route The crankcase vent valve seals off the duct to the intake plenum The then greater intake air demand generates a vacuum in the clean air pipe between the turbocharger and the intake silencer That vacuum is sufficient to keep the ball valve in the particle separator in the ...

Page 28: ...harger aspirated mode Index Explanation A Clean blow by gas B Blow by gas C Oil 1 Control spring 2 Ball valve 3 Artificial felt element for oil separation 4 Bulkhead 5 Blow by gas ducts 6 Blow by gas ducts in the cylinder head 7 Blow by gas introduction ...

Page 29: ...rate oil consumption of up to 3 liters 1000 km 620 miles 4 1 6 Engine cover The engine cover was adapted to the S58 engine The engine cover is also the intake silencer of the S58 engine S58 engine engine cover 4 2 Crankshaft 4 2 1 Crankshaft with bearings Crankshaft The crankshaft is an optimized weight design and has been adapted to the high revving characteristics and greater power output of the...

Page 30: ...gul G490 is used The thrust bearing is located at the 4th bearing position When replacing the crankshaft main bearings the bearing shell classification must be taken into account The precise procedure for replacing the crankshaft main bearing shells can be found in the up to date information in the BMW workshop system ISTA 4 2 2 Connecting rod with bearing The forged connecting rod of the S58 engi...

Page 31: ...d bearing shells are of the lead free type Consequently a Federal Mogul G488 is used on both the rod side and the bearing cap side S58 engine connecting rod bearing Index Explanation 1 Piston 2 Connecting rod 3 Crankshaft 4 Connecting rod bearing ...

Page 32: ...mance petrol engines For the S58 engine the piston alloy is formed by forging which produces slightly different micro structures and properties That is indicated by the suffix P in the alloy designation The piston skirt is Grafal coated which is necessary due to the LDS coated cylinder liners The piston diameter is 84 mm The first piston ring is a nitride plain rectangular compression ring The 2nd...

Page 33: ... the alloy 16MnCr5 and then case hardened DLC diamond like carbon 4 3 Camshaft drive chain drive The entire chain drive system driving the camshafts on the S58 engine has been carried over from the N58TU engine As on the B58TU engine the composite camshafts are driven by an adapted single bushed roller chain with 154 links The tensioning rail is a carry over part from the B58TU engine while the bu...

Page 34: ...planation 1 Slide rail with holder 2 Bushed roller chain for camshafts 3 Chain tensioner 4 Tensioning rail 5 Bushed roller chain for oil pump 6 Oil pump sprocket 7 Guide rail As on the B58TU engine the oil pump is driven by a single bushed roller chain with 58 links ...

Page 35: ...nes and is therefore not described in this product information S58 engine overview of valve gear Index Explanation 1 Spark plug shaft 2 Injector shaft 3 Exhaust camshaft 4 Mounts for high pressure pump 1 5 Mounts for high pressure pump 2 6 VANOS unit exhaust camshaft 7 VANOS solenoid valve actuator exhaust 8 VANOS solenoid valve actuator intake 9 VANOS unit intake camshaft 10 Camshaft sensor reluc...

Page 36: ... lightweight construction camshafts are used The lightweight design camshafts for the S58 engine are composite camshafts as used on the modular engines S58 engine composite camshaft Index Explanation 1 Camshaft sensor reluctor ring exhaust side 2 Exhaust camshaft 3 Triple cam for high pressure pump 1 4 Flats for open end spanner 5 Triple cam for high pressure pump 2 6 Mount for VANOS adjuster exha...

Page 37: ...s for driving the high pressure pump The reluctor rings for the camshaft sensors have been realigned in comparison with the B58TU engine 5 1 2 Timing S58 engine timing diagram Index Explanation A Exhaust B Intake B58B30O1 S58B30T0 Intake valve diameter mm 30 1 30 1 Exhaust valve diameter mm 28 5 28 5 Maximum valve lift intake exhaust valve mm 9 9 9 7 9 9 9 7 Steering axis inclination intake camsha...

Page 38: ...al for the S58 engine has been upgraded to a higher quality alloy material to cope with the thermal and higher stress on the engine 5 1 4 Valve springs Due to the different shaft diameters between the intake and exhaust valves the valve springs are different 5 2 Valvetronic 5 2 1 VANOS Overview The design and function of the variable camshaft timing system on the S58 engine is the same as on the B...

Page 39: ...ne speeds of the S58 of up to 7500 rpm the working curve of the eccentric shaft and intermediate lever has been adapted S58 engine valve lift control Index Explanation 1 Exhaust camshaft 2 Intermediate lever 3 Intake camshaft 4 Gate 5 Torsion spring 6 Eccentric shaft 7 Valvetronic servomotor 8 Roller cam follower intake side 9 Hydraulic valve clearance compensator intake side 10 Valve spring intak...

Page 40: ...S58 Engine 5 Valve Gear 34 Index Explanation 12 Exhaust valve 13 Valve spring exhaust side 14 Hydraulic valve clearance compensator exhaust side 15 Roller cam follower exhaust side ...

Page 41: ...dditional tensioning pulley is used With help of the additional tensioning pulley possible oscillations of the drive belt between the vibration absorber with belt pulley and air conditioning compressor are suppressed S58 engine belt drive Index Explanation 1 Belt pulley alternator 2 Ribbed V belt 3 Belt tensioner 4 Belt pulley A C compressor 5 Additional tensioning pulley 6 Combined vibration abso...

Page 42: ...he pump and thereby the coolant delivery rate at high engine speeds cavitation The diameter of the belt pulley for driving the alternator has been changed in comparison with the one on the B58TU engine That was necessary because as a result of the higher revving speeds of the S58 engine compared with the B58TU engine the alternator would otherwise have been driven too fast ...

Page 43: ...il supply in the high engine speed ranges that occur in the S58 engine Therefore a spur gear pump with integrated twin oil return pump which is also a spur gear pump is used on the S58 engine This combination is more compact at a higher delivery rate than the volume flow controlled pendulum slide pump The external gear pump is volume flow controlled and is supplemented by a map control Bolted onto...

Page 44: ... oil pump Index Explanation 1 Oil drain plug 2 Oil level sensor 3 Oil intake snorkel sump rear 4 Oil filter housing 5 Oil temperature sensor 6 Oil pressure sensor 7 Map control valve 8 Characteristic map controlled external gear pump 9 Oil pump sprocket ...

Page 45: ...7 3 Oil pump The oil pump is screwed to the crankcase and is driven by the crankshaft via a chain S58 engine oil sump with suction pump Index Explanation 1 Vacuum pump 2 Drive gear suction pump 3 Intake port front left sump oil return pump 4 Impeller oil return pump front left sump 5 Intake port front right sump and turbocharger oil return pump ...

Page 46: ...ntake snorkel the oil is conveyed by the external gear oil pump via the gears into the engine oil duct into the engine block and to the oil filter The non driven oil pump gear can be axially shifted in this pump thereby varying the delivery rate Axial shifting is effected by the oil pressure from the filtered oil duct coming from the main oil duct which can be varied via the map control valve by m...

Page 47: ...Index Explanation A Intake side B Major thrust face C Direction of flow direction of rotation 1 Oil intake snorkel pressure relief valve rear sump 2 Oil duct into the engine block unfiltered oil 3 Axially movable impeller 4 Oil pump drive pressure control spring ...

Page 48: ...y position by the pressure control spring 1 This position can also be actively approached via the map control valve from the minimum delivery position The map control valve is switched so that the oil can flow into the sump via the map control valve This position of the data map control valve simultaneously directs the oil pressure from the filtered oil duct 2 via the oil duct 12 to the back of th...

Page 49: ... maximum delivery Index Explanation A Second level control pressure B Map control pressure C Oil pressure 1 Pressure control spring 2 Control line second level control emergency operation 3 Axially movable impeller 4 Pressure relief valve ...

Page 50: ...cond level control pressure due to the difference in surface area on the control piston 8 The map control pressure presses against the control piston spring and thus adjusts the control piston 8 toward minimum delivery By being moved to the minimum delivery position the control piston 8 opens the oil duct to the piston pressure side 15 The filtered oil from the oil duct 12 is now conveyed to the f...

Page 51: ... minimum delivery Index Explanation A Second level control pressure B Map control pressure C Oil pressure 1 Pressure control spring 2 Control line second level control emergency operation 3 Axially movable impeller 4 Pressure relief valve ...

Page 52: ...ontrol The second level control pressure 2 acts on the smaller rear surface of the control piston 8 The second level control pressure 2 presses against the control piston spring and thus adjusts the control piston 8 toward minimum delivery By being moved towards the minimum delivery position the control piston 8 opens the oil duct to the forward piston pressure side 15 The filtered oil from the oi...

Page 53: ... 5 Electrical connection 6 Valve spool 7 Filter The oil pressure sensor and the oil temperature sensor are connected to the main oil duct and supply the actual oil pressure and the engine oil temperature to the DME control unit The DME calculates the required target oil pressure based on the engine s operating point and the temperature A pulse width modulated signal is sent to the map controlled c...

Page 54: ...es the position of the control piston in the oil pump and therefore the delivery rate of the pump 7 5 Oil supply during high acceleration In order to adapt the oil supply system to motor racing requirements a twin oil return pump has been installed to ensure the system functions effectively The oil return pump assists return of the oil from the turbochargers and from the forward sections of the su...

Page 55: ...S58 Engine 7 Oil Supply 49 S58 engine suction pump Index Explanation A Intake side B Major thrust face C Direction of flow direction of rotation 1 Return pipe 2 Aluminium frame ...

Page 56: ...ing longitudinal acceleration The oil drawn off is pumped back to the rear part of the sump via the return pipe in the aluminium frame There the external gear oil pump can take up the oil again via the rear oil intake snorkel and deliver it to the engine lubrication points Also at the bearing positions of the exhaust turbocharger the engine oil may collect due to the centrifugal force during later...

Page 57: ...l pumps The outer upper chamber of the gear pump is the suction chamber The oil intake snorkels from the front part of the sump are connected to the suction chamber and the engine oil is drawn off through the aluminium frame with integral oil return pumps The lower chamber is a pressure chamber Via the pressure chamber the drawn in engine oil is delivered back to the rear oil sump via the return o...

Page 58: ...r Closing pressure 4 0 bar The controlled oil spray nozzles used on the intake side of the crankcase are conventional oil spray nozzles with a permanently set opening and closing pressure The oil spray nozzles do not open until the oil pressure reaches 4 3 bar in order to ensure sufficient piston crown cooling regardless of the load at high engine speeds The oil spray nozzles close again if the oi...

Page 59: ...he centrally controllable piston cooling has the following special features Additional oil ducts in the cylinder crankcase Oil spray nozzles without defined opening pressure Piston cooling control valve Piston cooling relay valve The central valve controls the oil spray nozzles on the exhaust side of the crankcase This enables requirement based piston cooling over the entire characteristic map ran...

Page 60: ...th the following benefits Lower drive power of the oil pump Smaller dimensioning of the oil pump Lower fuel consumption Lower exhaust emissions 7 7 1 Relay valve control valve The valves have the task of selectively activating or deactivating the piston cooling and consist of the following two components Piston cooling control valve Piston cooling relay valve Piston cooling control valve The pisto...

Page 61: ...l valve 4 Main oil duct from oil filter 5 Oil strainer 6 Valve seat 7 Valve ball 8 Sealing ring 9 Solenoid coil 10 Electrical connection The piston cooling control valve has the following two switching positions Piston cooling control valve de energized The force of the compression spring holds the piston cooling control valve closed Return channel is connected to the control channel ...

Page 62: ...s closed by the valve ball Piston cooling relay valve The piston cooling relay valve is a purely mechanical valve and has the task of activating or deactivating piston cooling S58 engine piston cooling relay valve central valve Index Explanation 1 Control channel from piston cooling control valve 2 Oil duct to the oil spray nozzles 3 Main oil duct from oil filter 4 Sealing ring 5 Piston 6 Spring 7...

Page 63: ...to the oil spray nozzles is not opened Piston cooling control valve energized Oil is directed from the piston cooling control valve through the control channel to the space behind the pistons of the piston cooling relay valve Oil pressure and spring force generate a back pressure and seal off the piston cooling relay valve from the main oil duct The channel to the oil spray nozzles can no longer b...

Page 64: ...ng control valve 6 Control channel 7 Piston cooling relay valve 7 8 Oil filter and engine oil cooling The oil filter housing is made from aluminium For engine cooling a discrete engine oil cooler is used which is fitted horizontally in front of the radiator module Depending on the engine oil temperature a thermostat at the oil filter housing enables the oil flow to the engine oil cooler S58 engine...

Page 65: ...to obtain the target engine oil temperature 100 C 212 F is chosen as the initial opening temperature because then the condensation water in the oil evaporates through the crankcase ventilation system 7 9 Engine oil monitoring 7 9 1 Oil pressure Because the S58 engine has a data map controlled oil pump it is necessary to precisely register the oil pressure For that reason an oil pressure sensor is ...

Page 66: ...e front smaller sump is drained completely during an engine oil service the upper section of the sump features a small drain hole through which the engine oil can flow to the rear sump S58 engine drain hole Index Explanation 1 Drain hole 2 Front smaller oil sump 3 Rear oil sump The current engine oil recommendations and capacities can be a found in the current documentation of the BMW workshop inf...

Page 67: ...cer Clean air duct due to new exhaust turbochargers completely new Crankcase venting components Indirect charge air cooling Coolant cooled electromotive throttle controller Tank ventilation system adapted As can be seen from the graphics the design of the intake air system is more complex as two turbochargers are fitted and indirect charge air cooling is employed S58 engine intake air system ...

Page 68: ... 3 4 Clean air duct cylinders 4 6 5 Exhaust turbocharger cylinders 4 6 6 Intake silencer 7 Intake plenum with indirect charge air cooler 8 Throttle valve 9 Exhaust turbocharger cylinders 1 3 10 Y charge air pipe 11 Unfiltered air pipe left 12 Intake snorkel left 13 Intake air temperature sensor 14 Charging pressure sensor before throttle valve ...

Page 69: ... system from above Index Explanation A Unfiltered air B Clean air C Heated charge air D Cooled charge air 1 Intake snorkel right 2 Unfiltered air pipe right 3 Clean air duct cylinders 1 3 4 Clean air duct cylinders 4 6 5 Air cleaner 6 Exhaust turbocharger cylinders 4 6 ...

Page 70: ...r density correction Engine speed cylinder charging Intake manifold differential pressure throttling correction Ambient pressure air density based on altitude correction The air mass calculated in this way is adjusted and corrected if necessary in line with the oxygen sensor signals air fuel ratio and the injection period fuel quantity Should the oxygen sensors fail a fault memory entry is made in...

Page 71: ... 1 Connection before turbocharger 2 Venturi nozzle pressure sensor 3 Tank ventilation line 4 Intake plenum connection 5 Tank vent valve 6 Connection to the tank ventilation line from the carbon canister 7 Indirect charge air cooler 8 Connection after throttle valve 9 Throttle valve 10 Venturi nozzle ...

Page 72: ...ridge The voltage measured is then included in the tank ventilation diagnosis as an actual data reading The venturi nozzle pressure sensor is a differential pressure sensor 8 1 5 Carbon canister To meet emission standards in the US a carbon canister with a larger volume is used The basic function of the carbon canister has not changed The increase in volume is solely for the purpose of collecting ...

Page 73: ...urbocharger cylinders 4 6 3 Exhaust manifold cylinders 4 6 4 Catalytic converter cylinders 4 6 5 Exhaust turbocharger cylinders 1 3 6 Catalytic converter cylinders 1 3 7 Catalytic converter particulate filter Not for the US 8 Catalytic converter particulate filter Not for the US 9 Center silencer 10 Rear silencer 11 Exhaust tailpipes ...

Page 74: ...exhaust flap Black chrome plated tailpipe trim 8 2 2 Exhaust manifold with turbocharger The exhaust manifold is designed in relation to the bank One exhaust manifold is used for every bank The condensing of the three exhaust ducts into a single exhaust duct results in an optimal inflow of the turbine of the exhaust turbocharger The exhaust manifold is cast into one part together with the turbine h...

Page 75: ...tem supplier for the mono scroll turbocharger assembly on the S58 engine is the MHI Group 8 2 3 Electrical wastegate valve actuator The S58 engine uses an electric wastegate controller The function of the electric wastegate controller on the S58 engine is the same as on the BMW AG engines The fundamental advantages of the electric wastegate controller are High adjustment speed Precise charging pre...

Page 76: ...ial pressure sensor connection 8 2 5 Front oxygen sensor The oxygen sensor LSU 5 2 from Bosch is used as a control sensor before the catalytic converter The function is comparable to the oxygen sensor LSU AVD and therefore is not described in detail here The oxygen sensor before catalytic converter LSU 5 2 is characterized by the following advantages High signal running especially in charged opera...

Page 77: ... S for signal analysis and is distinguished by the following characteristics To achieve quicker response characteristics after engine start half of the LSF 4 2 value a stronger controlled heater has been integrated in the LSF Xfour This improves signal stability Less space is required for installation Thanks to the high temperature resistance and optimal thermoshock protection the resistance to co...

Page 78: ...tailpipes The exhaust flaps are operated by an axially aligned electric motor with integrated gears and electronics The electric controller for the exhaust flaps has the following connections Voltage supply Ground Actuating wire signal line The exhaust flaps can be used influence the acoustics of the engine at low engine revs and low loads for reasons of comfort In addition the exhaust flap is int...

Page 79: ... button is pressed then the vehicle interior acoustics are trimmed to the maximum comfort setting That is independent of the selected driving mode in other words the Sound button overrides other acoustics settings Thus in order to obtain maximum comfort quietness when the Sound button is active the exhaust flap is kept closed for as long as possible Therefore it no longer opens when the driver cal...

Page 80: ... right 3 Electrical exhaust flap actuator EAKS right 4 Rear silencer 5 Twin tailpipe 6 Electrical exhaust flap actuator EAKS left In contrast with the exhaust flaps on the standard exhaust system the exhaust flaps of the M Sport exhaust system can adopt intermediate positions Therefore it is possible for the exhaust flaps to be continuously variably adjusted to any position On vehicles with the M ...

Page 81: ...ting the necessary vacuum for the brake booster S58 engine vacuum system Index Explanation 1 Vacuum pump 2 Non return valve 3 Non return valve 4 Brake booster 9 1 1 Vacuum pump The vacuum pump is attached to the oil pump The vacuum pump is only required for supplying the brake booster ...

Page 82: ...S58 Engine 9 Vacuum System 76 S58 engine vacuum pump Index Explanation 1 Screw connection 2 Diaphragm valve 3 Vacuum pump 4 Sealing plate ...

Page 83: ...B58TU engine the S58 engine uses twin high pressure pumps This is necessary in order to provide the higher fuel level in the rail to achieve the required performance data and engine speeds of the S58 engine S58 engine high pressure injection in the overview Index Explanation 1 High pressure line for injectors 2 High pressure pump 1 3 Volume control valve 1 4 High pressure pump 2 5 Volume control v...

Page 84: ...ues to operate at 100 delivery rate with terminal 15 ON 10 3 High pressure fuel system For the S58 engine the high pressure injection HDE 6 is used Changes were made in regard to the fuel injection pressure which can now range up to 350 bar Increasing the fuel injection pressure from 200 bar to 350 bar results in the following advantages Improved fuel atomization More efficient delivery Reduced fu...

Page 85: ...liness and to observe the work sequences described in the repair instructions Even the slightest contamination and damage to the screwed fittings of the high pressure lines can cause leaks When working on the fuel system of the S58 engine it is important to ensure that the ignition coils are not fouled with fuel The resistance of the silicone material is greatly reduced by sustained contact with f...

Page 86: ...cooling system plus an oil cooling system for the engine oil and the M automatic transmission S58 engine cooling systems Index Explanation 1 Engine oil cooler 2 Transmission oil cooler 3 Upstream low temperature radiator charge air 4 Low temperature cooler charge air 5 Radiator engine 6 Coolant expansion tank charge air ...

Page 87: ...ission oil cooling 10 Auxiliary radiator engine S58 engine engine cooling with exhaust turbocharger and charge air cooling Index Explanation 1 Low temperature cooler charge air 2 Upstream low temperature radiator charge air 3 Radiator engine 4 Electric coolant pump low temperature circuit charge air 5 Coolant expansion tank charge air ...

Page 88: ...pump engine 9 Electric coolant pump for exhaust turbocharger 10 Exhaust turbocharger 11 Coolant temperature sensor 12 Heater matrix for vehicle interior heating 13 Electric coolant pump heating for passenger compartment 14 Throttle valve 15 Coolant expansion tank engine 16 Electric fan 17 Auxiliary radiator engine ...

Page 89: ...Index Explanation 3 Radiator engine 7 Thermostat 8 Mechanical coolant pump engine 9 Electric coolant pump for exhaust turbocharger 10 Exhaust turbocharger 11 Coolant temperature sensor 12 Heat exchanger for heating system 13 Electric coolant pump heating for passenger compartment ...

Page 90: ...nnection of the additional radiator at the cooling system The additional radiator is connected with coolant lines at the radiator in parallel whereby the cooling area increases S58 engine coolant circuit with exhaust turbocharger Index Explanation 1 Radiator engine 2 Mechanical coolant pump engine 3 Thermostat 4 Electric coolant pump for exhaust turbocharger 5 Turbocharger units ...

Page 91: ... 10 Coolant expansion tank engine The thermostat used is a data map thermostat which can be controlled by the DME The thermostat starts opening at a coolant temperature of 101 C 214 F The thermostat is fully open at a coolant temperature of 120 C 248 F 11 2 1 Cooling circuit exhaust turbocharger S58 engine cooling circuit of the exhaust turbocharger with electrical auxiliary coolant pump ...

Page 92: ...d on taking into account the following factors Coolant temperature at the engine outlet Engine oil temperature Injected fuel quantity Using these values the heat input into the engine is calculated The run on period of the electric coolant pump can last up to 30 min To improve the cooling effect the electric fan also cuts in and may run on for up to 11 min 11 2 2 Charge air cooling In the S58 engi...

Page 93: ...sion tank charge air 6 Indirect charge air cooler The capacity of the charge air cooling circuit is approx 4 liters The coolant in the charge air cooling system is circulated by a 130 W electric coolant pump which communicates with the DME via a LIN bus The two water to air heat exchangers are connected in parallel and are supplied via an expansion tank which is attached to the vehicle The indirec...

Page 94: ...circuit charge air Index Explanation 1 Low temperature coolant radiator charge air 2 Upstream low temperature radiator charge air 3 Coolant expansion tank charge air 4 Indirect charge air cooler 5 Electric coolant pump low temperature circuit charge air ...

Page 95: ...ious applications The control unit code DME 8 6 S can be deciphered as follows AbbreviationMeaning DME Digital Motor Electronics 8 Control unit generation modular operating system for petrol and diesel engine 6 Number of cylinders as hexadecimal figure S M Sport engine management Number of cylinders as a hexadecimal figure 3 3 cylinder engine 4 4 cylinder engine 6 6 cylinder engine S 8 cylinder en...

Page 96: ...S58 Engine 12 Engine Electrical System 90 12 1 1 DME control unit S58 engine DME 8 6 S ...

Page 97: ...noid valve intake camshaft 18 VANOS solenoid valve exhaust camshaft 19 Electric coolant pump exhaust turbocharger 20 Piston cooling control valve 21 Electrical exhaust flap controller EAKS 22 Volume control valve high pressure pump 1 23 Electrical exhaust flap controller EAKS 24 Volume control valve high pressure pump 2 25 30 Injectors 31 36 Ignition coils 37 Earth 38 Electric wastegate valve cont...

Page 98: ...or petrol particulate filter Not for the US 62 Differential pressure sensor petrol particulate filter Not for the US 63 Valvetronic servomotor 64 Oil level sensor 65 Electric coolant pump charge air cooler 66 Alternator Do not attempt any trial replacement of control units Because of the electronic immobilizer a trial replacement of control units from other vehicles must not be attempted under any...

Page 99: ...nput signals The signals for activating the actuators are calculated from the input signals the setpoint values calculated using a computing model in the DME control unit and the stored characteristic maps The DME control unit activates the actuators directly or via relays The PT CAN wakes up the DME control unit The after run begins once the terminal is switched to OFF The adaptation values are s...

Page 100: ... the DME control unit accommodates two sensors a temperature sensor and an ambient pressure sensor The temperature sensor is used to monitor the temperature of the components in the DME control unit The ambient pressure is required for calculating the mixture composition ...

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