We drain the liquid from the cooling system with the heater valve open (see Coolant replacement).
We remove the hoses from the heater pipes and the seal (see Removing the heater valve).
Removing the heater fan (see Removing the heater fan). Wherein «negative» the motor wire may not be disconnected.
We take out the radiator with a tap.
key «on 10» unscrew the two bolts securing the faucet to the radiator.
We remove the crane.
We take out the fastening nuts from the grooves of the radiator tank (for radiator mod. 2105).
key «on 10» unscrew two screws (for radiator mod. 2101 - two nuts) outlet fittings..
... and remove the pipe with the gasket.
We assemble and install the heater core in reverse order. We fill the engine cooling system with liquid and check the tightness of the connections.