Abstract: A venting arrangement for a cooling circuit of an internal combustion engine, having a vent line which connects a radiator to a top section of an expansion tank located at a higher level with regard to the top of the radiator. In order to avoid trapping of air inside the vent line, a vent valve in the form of a flap or diaphragm valve is installed at the highest point of the vent line, via which vent valve the trapped air can escape during travelling operation and during filling. By the arrangement of the vent valve inside the expansion tank, the cooling water expanding during running of the engine and discharging via the vent valve remains in the expansion tank.

Abstract: A delivery-valve unit is provided on a compensating tank in the cooling circuit of an internal-combustion engine. Individual relief valves inside a receiving housing arranged horizontally in a cover of the compensating tank are additionally surrounded by valve housings which are snapped together. The sealing surfaces of the relief valves are uncoupled from the walls of the compensating tank. In the event of dimensional changes in the compensating tank, this arrangement prevents both deformations of the sealing surfaces occurring as a result of a water-level-induced pressure rise and leaks at the relief valves.

Abstract: In a device for monitoring the liquid level in a tank, utilizing a reed switch projecting into the tank in an internally cylindrical hollow rod and a float provided with a permanent magnet and guided on the hollow rod, the reed switch is constructed as an independent exchangeable part introducible into the hollow rod with an accurate fit and with a small assembly outlay. The slide-in part has three radially resilient abutment zones distributed uniformly around the circumference. In order to accurately introduce the slide-in part into the hollow rod, with a minimum of force, three axial guide grooves associated with the resilient abutment zones are formed radially outwards in the inner envelope surface of the hollow rod. In order to achieve the final accurate fit, the slide-in part, introduced completely into the hollow rod, is rotated until the resilient abutment zones are located in regions between the guide grooves of the hollow rod.

Abstract: The cooling air circulation system at the front end of a motor vehicle has several separate air ducts which are arranged one on top of the other and in which a water cooler and a supplementary cooler are position. Improved cooling is achieved by the cooling air of an upper and central air duct being conveyed to the water cooler, in front of which are mounted in the upper air duct only a condenser of an air-conditioning system and an electric fan, and by a lower air duct, in which the supplementary cooler is arranged, leading into an opening in front of the water cooler on the underside of the front end.

Abstract: A radiator, especially for motor vehicles, which includes at the underside of its bottom at least one bearing support part for its vertical support and a drainage aperture in the bottom for the drainage of the cooling liquid; the drainage aperture thereby extends through the bearing support part.

Abstract: A radiator mounting of a vehicle in which the radiator rests by means of at least one mounting support fixed at the radiator on a corresponding mounting support fixed at the vehicle and in which at least one hold-down member secured at a fixed part of the vehicle and cooperating with a corresponding counter-support member at the radiator prevents the lifting of the mounting support fixed at the radiator from its mounting support fixed at the vehicle; the tilting of the radiator about a reference axis in one circumferential direction is thereby counteracted by at least one abutment fixed at the vehicle and cooperating with a counter-abutment fixed at the radiator while a connecting element opposes the tilting of the radiator in the other circumferential direction; a center section of the connecting element thereby additionally cooperates with the counter-support member to perform itself the hold-down function.