Reference Manual
N26 ENGINE
Technical Training
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without the express written consent of BMW of North America, LLC ("BMW NA").
BMW
Technical Training
N26 Engine
Reference Manual
BMW of North America, LLC
Technical Training
ST1215
09/1/12
www.bmwcenternet.com
The Ultimate
Driving Machine
®
Information Status: September 01, 2012
Course Code: ST1215 N26 Engine
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.
© 2012 BMW of North America, LLC. The BMW name and logo are registered trademarks. All rights reserved.
Table of Contents
N26 Engine
Subject Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
N26 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
N26 Engine Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Horse Power and Torque Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Engine Components/Systems Overview . . . . . . . . . . . . . . . . . . . . . . . .7
Engine Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Engine Designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Engine Identification and Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
N26 Specific Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cylinder Head Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
High Pressure Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Fuel Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Fuel Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Fuel System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Exhaust Turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Catalytic Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Additional Emission Reduction Measures . . . . . . . . . . . . . . . . . . . . . . . .17
HC Fleece . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Driving Performance and Fuel Consumption . . . . . . . . . . . . . . . . . . . . . .19
Initial Print Date: 09/12
Revision Date: 11/12
N26 Engine
Model: F30
Production: From 03/2012
After completion of this module you will be able to:
• Describe the features of the N26B20O0 engine
• Describe the specifications of the N26B20O0 engine
2
N26 Engine
Introduction
N26 Engine
The N26 engine is the third generation of the BMW SULEV engines used in the US
market. The N26 shares many technical features with the current N20 engine. This
engine is currently available in the F30 328i as of 3/2012. The new N26 engine is the
first turbocharged SULEV gasoline engine worldwide that requires no secondary air
system.
This not only means that the BMW Group is complying with the requirements of the
world’s most stringent exhaust emission legislation, but also underlines the fact that
the term “premium” is being defined by the many facets of substantiality to an ever
increasing extent. Twin Power Turbo technology enables dynamic performance and
achievement of low fuel consumption while adhering to the most stringent exhaust
emission limits.
N26B20O0 engine
N26 Engine
3
Models with the N26 engine were launched to the US market in the March 2012.
Model Model series Engine Power output in kw/bhp Torque in Nm
328i F30 N26B20O0 180/240 350
Emission Label
History
The following chart list all previous BMW SULEV gasoline engines.
Engine Model
M56B25
N51B30
328iA
128i
128i
328i / 328ix
Model
series
E46
Coupe
Sedan
Sportwagon
E82
E88
E90/92/93
Displacement
in liters
2.5
3.0
Power out-
put in kW/
bhp
135kW
(184 hp)
170 kW
(230 hp)
Torque
in Nm
237 Nm MS 43 2003-2006
271 Nm MSV80.1
Engine
control
system
Introduced-
discontinued
MY 2008-2012
MY 2008-2012
MY 2006-2011
N26 Engine Features
The N26 engine also shares many features with the N20 engine, such as the cylinder
head, valvetrain, engine block, crankshaft, pistons. Over 95% of the N26 engine is carried
over from the N20.
By using the latest technology TVDI (Turbocharged Valvetronic Direct Injection) in
conjunction with a TwinScroll exhaust turbocharger, it is now possible to decrease
emissions substantially, while at the same time maintaining the same power output
as the N20.
4
N26 Engine
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