Disconnect the coolant supply hoses to the automatic air damper. Pay attention to the relative position of the bimetallic spiral housing alignment marks, unscrew the 3 fastening screws and remove the bimetallic spiral housing from the automatic air damper (see Fig. 4A.32).
Remove the screening ring. Set the throttle lever to the fully open position. Move the starting device drive lever up until the air flaps are fully closed and release the throttle drive lever. Secure the drive lever in the upper position with a rubber band (see Fig. 4A.33).
Use a screwdriver to press the membrane rod until it stops. Measure the air damper clearance with a calibrated rod (or a drill shank). If the clearance does not match the required value, remove the protective cap from the adjusting screw and, turning the adjusting screw with a screwdriver, set the required clearance (see Fig. 4A.34).
Install a new membrane cover protective cap and remove the rubber. Install the screening ring. Install the bimetallic spring housing, ensuring proper engagement of the spring and the damper drive lever. Tighten the housing mounting screws by hand. Rotate the housing to align the alignment marks, then finally tighten the mounting screws (see Fig. 4A.35).
Connect the coolant hoses. Install the air filter.