BMW 17137640514 Coolant Expansion Tank

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If a faulty hose is found during the checks, it should be replaced by following these steps. First, drain the cooling system and collect the coolant in a clean container if it doesn't need to be replaced. To disconnect a hose, pry up the wire retaining clip and pull the hose from its fitting. Some hoses may have traditional hose clamps, which can be loosened and moved along the hose to disconnect it. Avoid disconnecting any part of the system while it's still hot. Certain models may have twist-on/twist-off clamps that need to be rotated counterclockwise to remove them. Be careful when removing hoses from the radiator inlet and outlet unions, as they are fragile. If a hose is difficult to remove, try rotating the ends before using a sharp knife to slit and peel it from the radiator fitting. When installing a hose, push the end over the fitting until the retaining clip locks it in place. For hoses with traditional hose clips, slide the clips onto the hose before positioning it. Use soapy water or hot water to soften stiff hoses if needed. Refill the cooling system and check for leaks after any disturbance. To remove the coolant reservoir, remove the air intake duct, disconnect the hoses, remove the mounting bolts, unclip the reservoir from the bracket, and lift it up. Disconnect the coolant level switch connector and remaining coolant hose before removing the reservoir. Installation is the reverse of removal. Refill the cooling system.