Drive in engine numbers at marked surface with impact tool.
M47 / M47TU / M47T2
Fig. 1: M47 / M47TU / M47T2 Engine Identification
M57 / M57TU / M57T2
Fig. 2: M57 / M57TU / M57T2 Engine Identification
M67 / M67TU
Fig. 3: M67 / M67TU Engine Identification
N47
Fig. 4: N47 Engine Identification
M52