Gasoline engine. General information (Audi 80 B3)

The cylinder block is made of gray cast iron. The crankshaft is located in the lower part of the cylinder block, lying in the main bearings. Connecting rods are connected to the crankshaft by means of plain bearings. In turn, they are connected to the pistons. The engine is closed at the bottom by an oil sump, into which the oil used for lubricating the engine and cooling is drained. The head is located on top of the cylinder block. It is connected to the block with bolts. The cylinder head is cast from aluminum, which provides better thermal conductivity and is lighter than cast iron.

The intake and exhaust manifolds are attached to one side of the cylinder head. The camshaft is located on top of the cylinder head. It is driven by a belt. The camshaft operates the intake and exhaust valves using hydraulic tappets. The hydraulic tappets automatically set the valve clearances so that no additional adjustment is required as part of maintenance.

[The article is a reprint of material from: AudiManual.ru]