Air is sucked into the air filter and engine cylinders through the thermostat 5 (pic. 9-4) with manual control.
Pic. 9-4. Air filter: 1 - sealing gasket; 2 - corrugated hose; 3 - thermostat damper handle; 4 - cold air intake; 5 - thermostat; 6 - coupling bolt; 7 - nut for fastening the filter cover; 8 - air filter cover; 9 - filter cover seal; 10 - filter element; 11 - bracket for fastening the filter cover; 12 - exhaust manifold of exhaust gases; 13 - air filter housing; 14 - spring holder, 15 - heated air intake from the exhaust manifold area