BMW B46TU User manual

Technical Training
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").
Copyright © 2018 BMW of North America, LLC
B46TU/B48TU
ENGINES
Reference Manual

Technical�training.
Product�information.
BMW�Service
B46TU�/�B48TU�Engines

General�information
Symbols�used




Information�status:�April�2017

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
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

Additional�sources�of�information

 
 
 
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”).



B46TU�/�B48TU�Engines
Contents
1. Introduction1
  
  
  
  
  
 
2. Engine�Mechanical6
  
 
  
  
  
 
 
  
  
3. Cooling�System 17
  
 
  
 
  
 
 
 
4. Exhaust�System 27
 
5. Fuel�System28
  
 
 
 
6. Engine�Electrical�System 34
  

B46TU�/�B48TU�Engines
1.�Introduction




1.1.�Innovations�B46TU




B46TU�/�B48TU�Engines
1.�Introduction

Index Explanation
 
 
 
 
 
 
 
 



1.2.�Innovations�B48TU

 
 
 
 
 
 
 
 
 
 

B46TU�/�B48TU�Engines
1.�Introduction

1.3.�Engine�identification
1.3.1.�B46TU�engine


B46TU�/�B48TU�Engines
1.�Introduction

B48TU�engine

Index Explanation
 
 

�identification�code


A
B




B46TU�/�B48TU�Engines
1.�Introduction

1.4.�Technical�data

B46B20O1 B48B20T1












  
  
  
  
  
  
1.4.1.�Model�overview


Models Engine
 
 
 

B46TU�/�B48TU�Engines
2.�Engine�Mechanical

2.1.�Engine�housing
2.1.1.�Cylinder�head




B46TU�/�B48TU�Engines
2.�Engine�Mechanical

2.2.�Crankshaft�drive
2.2.1.�Crankshaft
Comparison�B46�crankshaft�with�B46TU�crankshaft





Index Explanation
 
 

B46TU�/�B48TU�Engines
2.�Engine�Mechanical

2.2.2.�Connecting�rod

Index Explanation
 
 
 
 
 
 
 
 
 
 
 


B46TU�/�B48TU�Engines
2.�Engine�Mechanical

IROX�coating

Index Explanation
 
 
 
 
 
 
 














B46TU�/�B48TU�Engines
2.�Engine�Mechanical

Bearing�shell�classification�of�connecting�rod�bearing


2.2.3.�Chain�drive
Features:
 
 
 
 
 
 



B46TU�/�B48TU�Engines
2.�Engine�Mechanical


Index Explanation
 
 
 
 
 
 
 
 
 
 
 

B46TU�/�B48TU�Engines
2.�Engine�Mechanical








Index Explanation
 �B46�is�identical)
 �B46TU�and
B48TU�are�identical)
 
 
 
 
 




B46TU�/�B48TU�Engines
2.�Engine�Mechanical


 
 
 
Chain�tensioner

Index Explanation
 
 
 



B46TU�/�B48TU�Engines
2.�Engine�Mechanical

2.3.�Valve�gear
2.3.1.�VANOS

Index Explanation
 
 





B46TU�/�B48TU�Engines
2.�Engine�Mechanical

2.4.�Belt�drive

Index Explanation
 
 
 
 
 
 
 
 
 





