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N63TU3
Product Information
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BMW N63TU3 Product Information

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Technical�training.
Product�information.
N63TU3�Engine
BMW�Service
General�information
Symbols�used
The�following�symbol�is�used�in�this�document�to�facilitate�better�comprehension�or�to�draw�attention to�very�important�information:
Information�status:�July�2018
BMW�Group�vehicles�meet�the�requirements�of�the�highest�safety�and�quality�standards.�Changes in�requirements�for�environmental�protection,�customer�benefits�and�design�render�necessary continuous�development�of�systems�and�components.�Consequently,�there�may�be�discrepancies between�the�contents�of�this�document�and�the�vehicles�available�in�the�training�course.
The�information�contained�in�the�training�course�materials�is�solely�intended�for�participants�in�this training�course�conducted�by�BMW�Group�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�procedures,�please�refer�to�the�current�information issued�by�BMW�of�North�America,�LLC,�Technical�Service�Department.
This�information�is�available�by�accessing�TIS�at�www.bmwcenternet.com.
Additional�sources�of�information
Further�information�on�the�individual�topics�can�be�found�in�the�following:
• Owner's�Handbook
• Integrated�Service�Technical�Application
• Aftersales�Information�Research�(AIR)
The�information�contained�in�this�manual�is�not�to�be�resold,�bartered,�copied,�or�transferred without�the�express�written�consent�of�BMW�of�North�America,�LLC�(“BMW�NA”).
©2018�BMW�of�North�America,�LLC
The�BMW�name�and�logo�are�registered�trademarks.�All�rights�reserved.
N63TU3�Engine
Contents
1. Introduction.............................................................................................................................................................................................................................................1
1.1. Models�with�N63B44M3�engine................................................................................................................................................... 1
1.2. Models�with�N63B44T3�engine.....................................................................................................................................................1
1.3. Technical�data............................................................................................................................................................................................................. 2
1.3.1. Full�load�diagram�N63B44M3�engine..................................................................................................3
1.3.2. Engine�highlights�N63B44M3......................................................................................................................... 4
1.3.3. Full�load�diagram�N63B44T3�engine....................................................................................................5
1.3.4. Engine�highlights�N63B44T3........................................................................................................................... 6
1.3.5. Comparison�of�components�with�N63TU2�engine......................................................... 7
1.4. Engine�identification..................................................................................................................................................................................... 12
1.4.1. Engine�identification....................................................................................................................................................12
1.4.2. Engine�identification....................................................................................................................................................13
2. Engine�Mechanical................................................................................................................................................................................................................ 14
2.1. Engine�housing..................................................................................................................................................................................................... 14
2.1.1. Crankcase.....................................................................................................................................................................................14
2.1.2. Cylinder�head�gasket................................................................................................................................................. 15
2.1.3. Cylinder�head......................................................................................................................................................................... 15
2.1.4. Cylinder�head�cover.....................................................................................................................................................16
2.2. Crankshaft�...................................................................................................................................................................................................................17
2.2.1. Connecting�rod�with�bearing......................................................................................................................... 18
2.2.2. Piston�with�piston�rings......................................................................................................................................... 19
2.3. Camshaft�drive/chain�drive................................................................................................................................................................. 21
3. Oil�Supply...............................................................................................................................................................................................................................................23
4. Intake�and� Exhaust�System..................................................................................................................................................................................24
4.1. Air�mass�determination............................................................................................................................................................................24
4.2. Intake�air�monitoring.....................................................................................................................................................................................24
4.3. Crankcase�ventilation�monitoring�system...................................................................................................................25
4.4. Exhaust�turbochargers�N63B44M3..................................................................................................................................... 28
4.4.1. Overboost.....................................................................................................................................................................................29
4.5. Exhaust�turbocharger�in�the�N63B44T3�engine..............................................................................................30
4.5.1. Blow-off�control..................................................................................................................................................................31
4.6. Exhaust�emission�system.....................................................................................................................................................................31
4.6.1. Exhaust�manifold.............................................................................................................................................................. 31
4.6.2. Catalytic�converters..................................................................................................................................................... 31
4.6.3. Exhaust�system...................................................................................................................................................................31
5. Cooling.........................................................................................................................................................................................................................................................32
5.1. Charge�air�cooler................................................................................................................................................................................................33
N63TU3�Engine
Contents
6. Fuel�Preparation.........................................................................................................................................................................................................................34
6.1. Overview.......................................................................................................................................................................................................................... 34
6.2. Fuel�pump�control............................................................................................................................................................................................35
6.3. High�pressure�pump.....................................................................................................................................................................................35
6.4. Injectors.............................................................................................................................................................................................................................35
7. Engine�Electrical�System..........................................................................................................................................................................................38
7.1. Engine�control�unit..........................................................................................................................................................................................38
7.1.1. DME�1�control�unit........................................................................................................................................................ 39
7.1.2. DME�2�control�unit........................................................................................................................................................ 42
7.1.3. Overall�function................................................................................................................................................................... 46
7.2. Ignition�coils............................................................................................................................................................................................................... 46
7.3. Spark�plugs................................................................................................................................................................................................................. 48
8. Engine�Cover....................................................................................................................................................................................................................................49
N63TU3�Engine
1.�Introduction
In�the�scope�of�a�product�update,�as�of�November�2018�the�BMW�Group�will�be�presenting�a�further development�of�the�N63TU2/�engine�originally�introduced�in�July�2015.�The�N63TU3�engine�will�be used�in�2�performance�classes�as�N63B44M3�engine�and�N63B44T3�engine.�The�main�developments in�the�N63TU3�engine�compared�to�the�N63TU2�engine�are�improved�response�characteristics, improved�acoustics,�increase�in�engine�torque�and�lower�pollutant�emissions.
New�features�in�the�area�of�engine�mechanics�are�reworked�piston�rings,�reworked�timing�chains, reworked�exhaust�gas�thermal�management�in�the�V-space,�introduction�of�a�"crosstalk�point"�in�the intake�area,�increase�in�the�fuel�injection�pressure�of�200�bar�to�350�bar�and,�in�the�area�of�the�engine electrics,�the�introduction�of�a�new�Digital�Motor�Electronics.�Critical�components�have�been�revised and�newly�implemented�with�a�view�to�improving�quality.
The�new�N63TU3�engine�is�being�introduced�for�the�first�time�as�N63B44M3�engine�for�series production�in�the�G05�and�in�the�new�G07.�The�N63B44T3�engine�will�be�initially�be�introduced�in�the G15�at�a�later�date.
The�N63B44M3�engine�will�gradually�be�replaced�by�the�N63B44T3�engine�which�means�it�will�be phased�out�in�the�medium�term.
Only�the�differences�between�the�N63TU3�engine�and�N63TU2�engine�are�described�in�this document.�A�more�in-depth�documentation�is�provided�in�the�product�information�for�the�N63TU2 engine�in�which�a�reference�is�provided�at�the�relevant�point.
1.1.�Models�with�N63B44M3�engine
Development�series N63B44M3�engine Series�introduction
G05 BMW�X5�xDrive�50i 08/2018 G07 BMW�X7�xDrive�50i 12/2018
1.2.�Models�with�N63B44T3�engine
Development�series N63B44T3�engine Series�introduction
G15 BMW�M850i�xDrive�Coupé 10/2018 G14 BMW�M850i�xDrive
Convertible
G12 BMW�750i 03/2019
11/2018
1
N63TU3�Engine
1.�Introduction
1.3.�Technical�data
Engine Unit BMW�X5
xDrive�50i
N63B44M3
Design V8 V8 Displacement [cc] 4395 4395 Firing�order 1-5-4-8-6-3-7-2 1-5-4-8-6-3-7-2 Bore�hole/Stroke [mm] 89/88.3 89/88.3 Power�output
at�engine�speed
Power�output�per�liter [kW/l] 77.4 88.7 Torque
at�engine�speed Compression�ratio [ε] 10.5�:�1 10.5�:�1 Valves�per�cylinder 4 4 Recommended�fuel [ROz] 87–98 87–95 CO2�emissions [grams�per
Digital�Motor�Electronics DME�8.8T.0 DME�8.8T.0
[kW�(HP)]
[rpm]
[Nm�(lb-ft)]
[rpm]
kilometer]
340�(456)
5250-6000
360�(490)*
5300-6000*
650�(479)
1500-4750
264 -**
BMW�M850i
xDrive�Coupé
N63B44T3
390�(523)
5500-6000
750�(553)
1800-4600
*�with�Overboost�function
**�values�were�still�not�available�on�the�date�the�document�was�published.
2
N63TU3�Engine
1.�Introduction
1.3.1.�Full�load�diagram�N63B44M3�engine
Full�load�diagram,�N63B44O2�engine�compared�to�the�N63B44M3�engine
3
N63TU3�Engine
1.�Introduction
1.3.2.�Engine�highlights�N63B44M3
N63TU3�engine,�Highlights�N63B44M3�engine
Index Explanation
A Exhaust�turbocharger�with�Overboost�function B Indirect�charge�air�cooler�with�bypass�line C Digital�Motor�Electronics�(DME�8.8T.0) D High-pressure�injection�up�to�350�bar
4
N63TU3�Engine
1.�Introduction
1.3.3.�Full�load�diagram�N63B44T3�engine
Full�load�diagram,�N63B44O2�engine�compared�to�the�N63B44T3�engine
5
N63TU3�Engine
1.�Introduction
1.3.4.�Engine�highlights�N63B44T3
N63TU3�engine,�Highlights�N63B44T3�engine
6
N63TU3�Engine
1.�Introduction
Index Explanation
A Exhaust�turbocharger�with�blow-off�valves B Indirect�charge�air�cooler�with�bypass�line C Exhaust�system�with�Gasoline�particulate�filter D Electric�arc�wire�sprayed�cylinder�walls E Digital�Motor�Electronics�(DME�8.8T.0) F High-pressure�injection�up�to�350�bar
1.3.5.�Comparison�of�components�with�N63TU2�engine
Engine�mechanics
Component New
feature
Cylinder�head cover
Cylinder�head
Cylinder�head gasket
Crankcase
Crankshaft with�main bearing
Connecting rod
N63B44T3
engine
N63B44T3
engine
Same
concept
Carry-over
part
N63B44M3
engine
N63B44M3
engine
Comment
Cylinder�bank�1�-�additional sensor�mounts�and�modification of�ignition�coil�screw�connections in�the�N63B44T3�engine, cylinder�bank�2:�taken�over�from S63B44T4�engine.
Same�concept�as�N63TU2�engine. Both�engines�feature�cylinder heads�of�the�N63B44T3�engine, geometrical�modifications.
Reworking�of�cylinder�head�gasket due�to�higher�outputs, modification�of�material.
Electric�arc�wire�sprayed�cylinder walls�in�N36B44T3�engine.
N63B44T3�engine:�new�main bearing�shell�materials�introduced/ crankshaft�rebalanced.
Forged�connecting�rod�of N63B44M3�engine�taken�over from�S63TU2�engine, N63B44T3�engine:�forged connecting�rod�taken�over�from
S63TU4�engine. Wrist�pin Taken�over�from�N63TU2�engine. Connecting
rod�bearing shells
Taken�over�from�N63TU2�engine.
7
N63TU3�Engine
1.�Introduction
Component New
feature
Piston
Piston�rings
Flywheel Carried�over�from�N63TU2�engine.
Valve�gear
Component New
Chain�drive with�timing chain
VANOS Carried�over�from�N63TU2�engine. Fully�variable
valve�lift adjustment
N63B44T3
engine
feature
Same
concept
Same
concept
Carry-over
part
N63B44M3
engine
Carry-over
part
Comment
Piston�skirt�coating�due�to changeover�to�electric�arc�wire sprayed�cylinder�walls�in�the N63B44T3�engine.
Piston�ring�1�and�2�taken�over from�N63TU2�engine, new�oil�scraper�ring�as�U-Flex�ring.
Comment
Chain�drive�with�timing�chain reworked.�Chromium�nitride�(CrN) coating�of�chain�pin�to�reduce wear.
Carried�over�from�N63TU2�engine.
Intake�valves and�exhaust valves
Valve�guides Carried�over�from�N63TU2�engine. Valve�stem
seal
Camshafts
Belt�drive�and�ancillary�components
Component New
feature
Vibration damper
Belt�drive Carried�over�from�N63TU2�engine.
Same
concept
Carry-over
part
Carried�over�from�N63TU2�engine.
Material�change.�Resilience�of valve�stem�seal�increased�to prevent�hardening.
Intake�camshaft:�Carried�over�from N63TU2�engine. Exhaust�camshaft:�Carried�over from�S63TU4�engine
Comment
N63B44M3�engine:�carried�over from�N63TU2�engine. N63B44T3�engine:�carried�over from�S63TU4�engine.
8
N63TU3�Engine
1.�Introduction
Oil�supply
Component New
feature
Oil�pump Carried�over�from�N63TU2�engine. Oil�sump Carried�over�from�N63TU2�engine. Oil�filter
module Oil�spray
nozzles
Air�intake�and�exhaust�emission�systems
Component New
feature
Intake�manifold Carried�over�from�N63TU2�engine. Exhaust
manifold
Exhaust turbocharger
N63B44T3
engine
Same
concept
Same
concept
Carry-over
part
Carry-over
part
N63B44M3
engine
Comment
Carried�over�from�N63TU2�engine.
Carried�over�from�N63TU2�engine.
Comment
Carried�over�from�N63TU2�engine,
hose�clamp�for�connection�of�the
twin-scroll�exhaust�turbocharger
carried�over�from�S63TU4�engine.
Exhaust�turbocharger�carried
over�from�N63TU2�engine�in
the�N63B44M3�engine,�but�with
Overboost�function.
New�exhaust�turbocharger�in�the
N63B44T3�engine�with�electrical
blow-off�valves.�New�generation
of�bearing�seats�from�the�modular
engines. Exhaust
turbocharger fluid�lines
Heat shields
Catalytic converter�near engine
Improved�thermal�protection�of
fluid�lines.
Carried�over�from�N63TU2�engine,
upper�heat�shield�adapted�to�the
relevant�exhaust�turbocharger.
Carried�over�from�N63TU2�engine.
9
N63TU3�Engine
1.�Introduction
Fuel�preparation
Component New
feature
High�pressure pump
Injectors
Cooling
Component New
feature
Engine�oil-to­coolant�heat exchanger
High­temperature circuit Engine�cooling
Mechanical Coolant pump
Characteristic map thermostat
Same
concept
Same
concept
Carry-over
part
Carry-over
part
Comment
350�bar�high�pressure�injection system.
350�bar�high�pressure�injection system.
Comment
Carried�over�from�N63TU2�engine.
Carried�over�from�N63TU2�engine.
Carried�over�from�N63TU2�engine.
Carried�over�from�N63TU2�engine.
Low­temperature circuit Charge�air cooling
Indirect�charge air�cooler
Engine�electrical�system
Component New
feature
Digital�Motor Electronics DME
VANOS solenoid�valves
Valvetronic servomotor
10
Carried�over�from�N63TU2�engine.
Same
concept
Carry-over
part
Bypass�line�between�the�two indirect�charge�air�coolers.
Comment
DME�8.8T.0 Hardware�from�modular�engines.
Carried�over�from�N63TU2 engine.
Carried�over�from�N63TU2 engine.
N63TU3�Engine
1.�Introduction
Component New
feature
Oxygen sensors
Ignition�coils
N63B44T3
engine
Spark�plugs
N63B44T3
engine
Knock�sensors
Oil temperature sensor
Intake�pipe pressure/ temperature sensor
Crankshaft sensor
Same
concept
Carry-over
part
N63B44M3
engine
N63B44M3
engine
Comment
Carried�over�from�N63TU2
engine.
Rod-type�ignition�coil�from
N63TU2�engine�in�N63B44M3
engine.�(31�kV)
Modular�ignition�coil�introduced�in
the�N63B44T3�engine.�(42�kV)
Carried�over�from�N63TU2�engine
in�the�N63B44M3�engine.
Carried�over�from�N63TU2
engine.
Carried�over�from�N63TU2
engine.
Carried�over�from�N63TU2
engine.
Carried�over�from�N63TU2
engine. Camshaft
sensor Coolant
temperature sensor
Oil�pressure sensor
Oil-level sensor
Rail�pressure sensor
Crankcase pressure sensor
Electronic wastegate valve�actuator
Carried�over�from�N63TU2
engine.
Carried�over�from�N63TU2
engine.
Oil�pressure�sensor�with
implemented�damping�element
for�improved�sensor�signal.
Carried�over�from�N63TU2
engine.
Carried�over�from�N63TU2
engine.
The�crankcase�pressure�is
monitored�by�a�crankcase
pressure�sensor.
Carried�over�from�N63TU2
engine.
11
N63TU3�Engine
1.�Introduction
Component New
feature
Starter�motor
Alternator
Electronic throttle controller
Same
concept
Carry-over
part
Comment
Carried�over�from�N63TU2 engine.
Carried�over�from�N63TU2 engine.
Carried�over�from�N63TU2 engine.
1.4.�Engine�identification
1.4.1.�Engine�identification
The�N63TU3�engine�in�the�form�of�the�N63B44M3�engine�variant�and�N63B44T3�engine�variant�is described�in�this�document.
The�engine�identification�is�used�in�the�technical�documentation�in�order�to�clearly�identify�the�engine.
Itemization
Index Explanation N BMW�Group�"New�Generation" 6 V8�engine 3 Engine�with�exhaust�turbocharger,�Valvetronic
and�direct�fuel�injection�(TVDI)
B Gasoline�engine�installed�longitudinally 44 4.4�liters�displacement M/T Medium�performance�class/top�performance
class
3 Third�reworking
12
N63TU3�Engine
1.�Introduction
1.4.2.�Engine�identification
The�engines�have�an�identification�mark�on�the�crankcase�to�ensure�unambiguous�identification�and classification.�This�engine�identification�is�necessary�for�approval�by�government�authorities.�The�first six�positions�of�the�engine�identification�correspond�to�the�engine�designation.
The�engine�number�can�be�found�on�the�engine�above�the�engine�identification.�This�consecutive number,�in�conjunction�with�the�engine�identification,�permits�unambiguous�identification�of�each individual�engine.
Example�of�an�N63TU�engine,�engine�identification�and�engine�number
Index Explanation
22620097 Individual,�consecutive�engine�number N BMW�Group�"New�Generation" 6 V8�engine 3 Engine�with�exhaust�turbocharger,�Valvetronic�and�direct�fuel�injection�(TVDI) B Gasoline�engine�installed�longitudinally 44 4.4�liters�displacement B�(D) Type�testing�requirements,�standard�(code�letter�"D"�is�used�for�N63TU3
engine)
13
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