All work on replacing the heater coolant valve should only be carried out on a cold engine.
When replacing the heater coolant valve on a vehicle with an engine «M57» it is necessary to remove the fuel cooler and take it to the side.
The replacement of the heater coolant valve must be carried out in the following order. Drain the fluid from the engine cooling system. Unclench the bandage (1, fig. 17.39) heater valve mounts. Disconnect loop (2) heater valve and open the bandage (3) heater valve mounts.
Pull valve (1, fig. 17.40) heater up. Loosen clamps (2) and disconnect the coolant hoses from the heater valve and remove the valve (1) heater coolant.
When installing, it is necessary to replace the bushings or the rubber cushion (4), by inserting guide pins (3) into a rubber pad. Fill with coolant and bleed the engine cooling system.