Initial P
rint
Dat
e: 10/06
Table of Contents
Subject Page
Gasoline Engines for E70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
N52B30O1 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Technical Data Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
N62B48O1 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
Hot-film Air Mass Meter (HFM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Throttle Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Engine Electronics (N52KP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Digital Motor Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
MSV80 Ov
erview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
N62B48O1 Engine Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Belt Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Electr
onic Oil Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Intake Air Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Digital Motor Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
N52B30O1 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
N62B48O1 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Cooling Circuit N52B30O1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Electric Coolant Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Cooling Circuit N62B48O1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Fuel Supply S
ystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
E70 Gasoline Engines
R
e
vision Dat
e:
Subject Page
Fuel Tank Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Fuel Tank Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Service Openings of the Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . .26
Subject Page
BLANK
PAGE
4
E70 Gasoline Engines

Gasoline Engines
Model: E70
Production: From Start of Production
After completion of this module you will be able to:
• Describe the engines used in the E70
• Understand the engine changes
The modern 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
N62B48O1 gasoline engines, representing the best engines in their class.
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
• N62B48O1 Engine
• Cooling system
• Exhaust system
• Fuel supply system
N52B30O1 Engine
The familiar 6-cylinder in-line engine N52B30O1 is the entry-level engine for the E70.
The N52 was introduced for the first time in 2005 in the E90. At that time, the engine
set new standards with its magnesium crankcase and VALVETRONIC II system.
5
E70 Gasoline Engines
Gasoline Engines for E70
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 for the E70:
• Intake system
• Belt drive
• Oil pan
Technical Data Comparison
6
E70 Gasoline Engines
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)
at engine speed (rpm)
170/231
5900
163/260
6600
Torque (Nm)
at engine speed (rpm)
300

3500
305
2500
Compression ratio
10.2 10.7
Valves/cylinder
4 4
F
uel 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
N62B48O1 Engine
The high-end motorization at the launch of the E70 is the N62B48O1 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
8

E70 Gasoline Engines
Specification N62B44 (E53) N62B48O1 (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)
at engine speed (rpm)
235/320
6100
261/350
6300
Torque (Nm)
at engine speed (rpm)
440
3600
475
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 (DME)
ME9.2 with VVT ME9.2.3 with VVT
Emission standard
LEV ULEV II
9
E70 Gasoline Engines
NOTES
PAGE
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
for the 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 order to 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 higher frequency 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 layer that 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. Mixing up the bolts can result in damage to the
belt drive.
Belt Driv
e
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 six V-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