2. Disconnect the hoses from the heater, marking the joints, and drain the escaping coolant. Please note that the radiator will still contain coolant.
3. Remove the dashboard (see Chapter 37 of this Section). Unscrew the bolts of the instrument panel mounting brackets.
4. Disconnect the control cables from the heater (see Chapter 39 of this Section).
5. Unscrew the bolts and remove the air ducts of the heater (see photo).
40.5. Remove the bolts from the instrument panel mounting bracket and fan hoses to remove the heater
6. Unscrew the heater bolts (see photo) and remove it, being careful not to spill any remaining coolant on the floor mats.
40.6. Heater mounting bolt
7. If necessary, the device's mounting screws can be removed and the heater radiator removed. Pay attention to the location of the outer rods before disconnecting them.
8. If the heater core is leaking, it is best to replace it with a new or repaired one. Home restoration is rarely successful. A radiator clogged with dirt can sometimes be cleaned with cold running water, but do not use chemically active cleaning agents.
9. Assembly is carried out in reverse order. Take care not to damage the radiator fins or tubes when installing it into the casing.
10. When assembling, make sure that all parts of the heater are installed correctly and there are no leaks, then tighten the fasteners securely. Adjust the control levers as described in Chapter 39 of this Section, then restore the instrument panel as described in Chapter 37.
11. Connect all heater hoses. The return device is located on the lower left side of the vehicle and is connected to the refrigerant return pipe. Feeder (located near the center of the car), on early carbureted models, is connected to the elbow or T-connector at the rear of the cylinder block. On later carburetor models, it is connected to the intake manifold. On fuel-injected models, the feed connection is made by a small metal tube that runs around the left side of the engine from a fitting on the front of the cylinder block (see Section 2 for details).
12. Refill the cooling system as described in Section 2.