The engine belongs to the 6-cylinder in-line units with an overhead valve mechanism (ohv), cross-flow aluminum alloy cylinder head and cast iron crankcase.
The crankshaft is mounted in seven main bearings, the sixth of which is thrust, responsible for the amount of axial play of the shaft.
The pistons are equipped with top and bottom compression rings and a 3-section oil scraper ring.
The piston pins have a floating fit in the connecting rod heads and are preloaded into the pistons. Fastening of fingers is provided with lock rings.
The camshaft rotates in seven bearings and is equipped with an integrated distributor drive gear. The camshaft drive sprocket is mounted at its front end. The camshaft is driven from the crankshaft by means of a chain drive (with roller chain). The rotational speed is half relative to that of the crankshaft.
The second chain is driven by the crankshaft of the oil pump.
Lubrication of the timing gears and chains is carried out through a special nozzle installed in front of the cylinder block.
The valves are driven by solid tappets, push rods and cast rocker arms. The rocker arms are put on a common axle and are lubricated through drillings in its pedestals.
Replaceable valve guides are pressed into the cylinder head and equipped with oil seals to prevent excess oil from being supplied against the required amount.
The rotary type oil pump is installed at the front of the cylinder block. A cam located at the rear of the oil pump drives the fuel pump. The oil pressure is maintained at a predetermined level by means of a spring-loaded pressure reducing valve located inside the oil pump housing.
The engine crankcase is hermetically articulated with the clutch/rotation converter dome to prolong the life of the starter and clutch (on models with manual transmission). A plug is provided in the lower part of the clutch dome, which allows periodically draining moisture / oil accumulating in the crankcase.