6 INTRODUCTION Engine Identification On MACK MP8 engines, the engine serial number is stamped on the left side of the engine block, below the inlet manifold. C0032621 In compliance with the emissions standards requirements, an engine exhaust emissions control sticker is affixed to one of the engine valve covers for all MACK engines. This sticker provides basic engine identification information. The engine information sticker is found on the top of the front cylinder head cover on MACK MP8 engines. C0032622