BMW 3: Engine identification
B46TU engine
Engine identification - transverse mounted shown
B48TU engine
Engine identification - transverse mounted shown
- Engine number
- Engine identification
The 7-digit engine identification is located on the crankcase in the area of the mounting for the crankshaft alignment pin. The first 6 digits of the engine identification code. Only the seventh digit is different. The seventh digit of the engine identification code is the test number of the type approval certification.
The 4th digit in the engine identification shown above is an A, this represents its a transverse mounted engine that will be installed in the F39 M35i. The G20 and G29 will have a B in the 4th position that represents the engine is longitudinal mounted.
The consecutive engine number is embossed above the engine identification. Using these two numbers the engine can be clearly identified by the manufacturer.
Technical data
The B46B20O1 and B46B20T1 engine is described:
Model overview
The table below provides an overview of the models in which the new B46TU and B48TU engine is used.
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Engine housing, Crankshaft drive
Engine housing
Cylinder head
The cylinder head is made of aluminum.
Only slight modifications have been made to the B46TU head compared to the B46.
Cylinder head
Crankshaft drive
Crankshaft
Comparis
Connecting rod - Crankshaft drive
Connecting rod
Piston
Area transferring the force
Wrist pin
Connecting rod bearing with shaped bore hole
Connecting rod
Connecting rod bearing (B46TU only)
Small connecting rod eye (trapezoid
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Loading
Safety information
Warning
High gross weight can overheat the tires, damage
them internally and cause a sudden drop in
tire inflation pressure. Driving characteristics
may be negatively impacted, reducing lane stability,
lengthening the braking distances and
changing the steering response. There is
Sun visor
Glare shield
Fold the sun visor down or up.
Glare shield from the side
Folding out
1. Fold the sun visor down.
2. Unhook it from the holder and swing it to the
side.
3. Move it back to the desired position.
Folding up
Proceed in the reverse order to close the sun visor.
Vanity mirror
A vanity mirr
