Note. Do not disconnect any hoses of the cooling path until the engine has completely cooled down - see subsection "Precautionary measures" In chapter General information and precautions.
If in the course of performing the checks listed in the relevant Section of the Chapter Current service, defects in the cooling system hoses are detected, they must be replaced.
Empty the cooling system. If the coolant filled in the path is fresh enough, it must be reused and must be drained into a clean container.
Try to remember the route of the hose to be replaced. To disconnect the hose, loosen the hose clamps on the fittings / nozzles of the corresponding components. Slide the clamps along the hose, completely freeing the sections of the latter seated on the fittings. Carefully remove the hose from its fittings/pipes. To fasten the hoses, two types of clamps are used: standard, as well as spring, to release which, squeeze the free ends with pliers.
Remember that the radiator inlet and outlet pipes are rather fragile elements - do not use excessive force when removing the hoses from them. Rotate the hose on the fitting to facilitate removal. At the very least, strongly "ingrained" the hose can be cut from the nozzle with a knife - despite the certain material costs associated with this method, it will still be cheaper to replace the hose than to purchase a new radiator (however, make sure you have a replacement hose on hand beforehand).
When installing a new hose, first put on the mounting clamps on it, only then pull the hose onto the fittings / pipes of the corresponding components of the cooling path. Some hoses and their fittings are equipped with landing marks - take care of their correct alignment.
To facilitate the fitting of rigid hoses on fittings, lightly moisten the ends of the latter with soapy water, or preheat the ends of the hose in warm water - do not use any oils as a lubricant.
Pull the hose ends onto the fittings and check the correctness of its laying in the engine compartment. Move the clamps to the ends of the hose, leading them behind the flare fittings / nozzles. Tighten the pinch screws.
Recharge the cooling system (see chapter Current service).
Start the engine, then carefully check the system for signs of coolant leaks.