BMW 3 Owners & Service Manuals

BMW 3: Engine Mechanical

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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

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 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

 System limits

Certain noises can be detected and may lead to problems. Keep the doors, windows, and glass sunroof closed. Noises from the front passenger or the rear seat bench can impair the system. Avoid making other noise in the vehicle while speaking. Major language dialects can cause problems with

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