1.Engine Number and Code:

1. ENGINE NUMBER AND CODE:
NEW ENGINES INSTALLED IN PRODUCTION

Engine Number:



A series production engine will have an eight-digit engine number consisting of two groups of four digits. The 1st block contains 4 digits with information on the assembly line and serial number of engines produced daily. The 2nd block shows the factory code and day of production.



Engine Code: (New Engines Installed in Production)

In addition to the eight digit engine number, an engine designation code is stamped in series production engines for model indentification. The decoding of these numbers can be accomplished using Attachment 1.

Note: These production engine designation codes are different from the codes of new/remanufactured engines obtained from the parts dept. and should not be confused with them. This code (see below) provides information on displacement, number of cylinders, fuel system, change status and country version of engines installed during production:

Hyphens and dashes are not die-stamped in the sequence, e.g.

16 4V B/A stands for:

16 = Displacement (e.g. 1.6I)

4/6/12 = 4- or 6- or 12-cylinders

E/V/T = Fuel Injected/Carbureted/Turbocharged engine

A,B,C = Internal BMW information (change index)

A/C/E/W/Y/Z = Country Codes

K = Catalytic converter



Fig. 1 M10-, M30-, S14 and S38 engines (Flywheel End of Crankcase)



Fig. 2 M20/M21 Engine (intake Side of Crankcase)



Fig 3. M42 Engine (intake Side of Crankcase)



Fig. 4 M50 Engine (intake Side of Crankcase)



Fig. 5 M70 Engine (Right Front Side of Crankcase)



Fig. 6 S38 Englne (Water Pump Flange)