Abstract: In a method for testing the tightness of a fuel tank in a motor vehicle, a container that absorbs fuel vapors and is connected by a vent line with a fuel tank and by a scavenging line with an intake manifold of the internal combustion engine of the motor vehicle is provided. The container has a vent line that is connected to the atmosphere, the line being closable by a shutoff valve. In addition, a pressure sensor that detects the system pressure in the fuel tank and a scavenging valve located in the scavenging line, which is opened to feed the fuel vapors stored in container and to develop a vacuum in the tank ventilation system, is provided.

Abstract: The invention relates to a multicylinder four-stroke internal combustion engine having a cylinder head (1) with an intake and an outlet port arrangement for two admission valves (15, 16, 17, 18) and two exhaust valves (26, 27) per cylinder. The admission valves (15, 16, 17, 18) are fitted on opposite-lying longitudinal sides of the engine and the exhaust valves (26, 27) on respective opposite side walls in relation to the crankshaft axis. One swirl duct (11, 12) and one filling duct (13, 14) leading to the admission valves (15, 16, 17, 18) are provided per cylinder (7, 8).

Abstract: In an internal combustion engine, especially a multi-cylinder four-stroke diesel engine with split cast crankcase comprising two half-shells (1a, 1b) clamped together by fastening studs, with the joint plane running in the direction of the crankshaft and cylinder axis, there are disposed, in recesses provided therefor in the half shells (1a, 1b), separate cylinder sleeves (2), each closed at its top end by a separate cylinder cover (10) with a circumferential rim. These cylinder covers (10) are completely clamped sealingly between the crankcase half shells (1a, 1b). A method for making such an internal combustion engine is also described.