UMZ-4215 engines have a traditional design which a long time is issued OJSC Volga Motors: the aluminum block of cylinders with the lower arrangement of the camshaft, the shtangovy drive of valves through yokes, the gear drive of the camshaft, an aluminum head with entry of inlet and final channels into one party.

Fig. 4.87. Longitudinal section of the engine

The main constructive difference of engines 4215 from ZMZ-4025 and ZMZ-4026 engines consists that they have the aluminum block with the filled-in thin-walled sleeves from special wearproof cast iron (IChG-ZZM). Nominal diameter of sleeves — 100 mm. The piston stroke remains the same — 92 mm. Effective engine cylinder capacity is increased due to increase in diameter of the piston up to 2,89 l. The longitudinal section of the engine is given in fig. 4.87.