BMW 3: Engine Mechanical
BMW 3 Series G20 (2018-2026) Training manual / B46TU-B48TU Engines / Engine Mechanical
- Engine housing, Crankshaft drive
- Connecting rod - Crankshaft drive
- IROX coating - Crankshaft drive
- Chain drive - Crankshaft drive
- Chain tensioner
- Valve gear
- Belt drive
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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
IROX coating - Crankshaft drive
Detailed magnification of the IROX coating
IROX-coated bearing shell
Oil film
IROX coating
Bearing shell
Binding resin
Hard particle
Solid lubricant
The IROX coating is applied to a conventi
SEE MORE:
System wiring diagram
G20 PHEV, system wiring diagram for fuel supply
Integrated supply module
Digital Motor Electronics (DME)
Shutoff valve purge air line (only for US version)
Body Domain Controller (BDC)
Fuel filler flap lock
Power distribution box, rear
Fuel pump control electronics
Hybrid pressure ref
General driving notes
Closing the trunk lid
Safety information
Warning
An open trunk lid protrudes from the vehicle
and can endanger occupants and other traffic
participants or damage the vehicle in the event
of an accident, braking or evasive maneuvers.
In addition, exhaust fumes may enter the car's
interior. There is
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