11
N55 Engine
Engine Designation and Engine Identification
Engine Designation
This training material describes the N55B30M0 in detail.
In the technical documentation, the engine designation is used for unique identification of
the engine. In the technical documentation you will also find the abbreviated engine des-
ignation, i.e. N55, that only indicates the engine type.
Item
Meaning
Index / explanation
1
Engine developer
M, N = BMW Group
P = BMW Motorsport
S = BMW M mbH
W = Non-BMW engines
2
Engine type
1 = R4 (e.g. N12)
4 = R4 (e.g. N43)
5 = R6 (e.g. N55)
6 = V8 (e.g. N63)
7 = V12 (e.g. N73)
8 = V10 (e.g. S85)
3
Change to the basic engine concept
0 = basic engine
1 – 9 = changes, e.g. combustion process
4
Working method or fuel type and
possibly installation position
B = Gasoline, longitudinal installation
D = Diesel, longitudinal installation
H = Hydrogen
5
Displacement in liters
1 = 1 liter (whole number of liters)
6
Displacement in 1/10 liter
8 = 0.8 liter (tenth of liter)
7
Performance class
K = Smallest
U = Lower
M = Middle
O = Upper (standard)
T = Top
S = Super
8
Revision relevant to approval
0 = New development
1 – 9 = Revision
Summary of Contents for N55
Page 29: ...29 N55 Engine N55 oil passages front view...
Page 35: ...35 N55 Engine N55 crankcase ventilation naturally aspirated mode...
Page 37: ...N55 crankcase ventilation turbocharged boost mode 37 N55 Engine...
Page 57: ...N55 Air Intake and Exhaust System 57 N55 Engine...
Page 83: ...83 N55 Engine Circuit Diagram N55 circuit diagram connection to vehicle electrical system...
Page 85: ...85 N55 Engine Engine Cooling Circuit Diagram N55 circuit diagram engine cooling...
Page 88: ...88 N55 Engine Digital Motor Electronics Circuit Diagram N55 MEVD17 2 Circuit Diagram...