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The most important component of a coolant module is the coolant radiator. It comprises the radiator core and water tank with all the necessary connections and attachment elements. The radiator core itself is made up of the radiator network - a pipe/rib system - the pipe bottoms and the sides. Conventional coolant radiators have a coolant box made of glass-fibre reinforced polyamide which has a seal fitted and is beaded before being placed on the pipe bottom. The latest technology consists of all-aluminium radiators, which weigh less and require less design depth – as well as being 100% recyclable. The heat produced by combustion in the engine is absorbed by the coolant and discharged to the external air via the radiator. Coolant radiators are installed in the air flow at the front of the vehicle, with different designs available. In the case of downflow radiators, the water enters the radiator at the top and emerges at the bottom. In the case of crossflow radiators, the coolant enters at one side and emerges at the other. Crossflow radiators have a lower design depth and are used particularly in passenger cars. Faults occur particularly frequently due to accidents or leaks.
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