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2.2.1 Engine side and cylinder designations
from MTU 12V4000M23F_ 12V4000M23S_ 16V4000M23F_ 16V4000M23S_ MS150068_01E Diesel Engine Operating Instruc
2.2 Engine Side and Cylinder Designations
2.2.1 Engine side and cylinder designations
Engine sides are always designated as viewed from the driving end (KS) (4). For designation of the cylinders (to DIN ISO 1204) the letter "A" (1) is used to refer to the cylinders on the left-hand side of the engine and the letter "B" (3) to refer to the cylinders on the right-hand side. The cylinders of each bank are numbered consecutively, starting with No. 1 at the driving end. The numbering of other engine components also starts with no. 1 at the driving end.
1 Left-hand side of engine 2 Free end 3 Right-hand side of engine 4 Driving end