1. Operation of the thermostat is checked visually by means of a mirror. |
2. Find the thermostat gate. |
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3. On some cars disconnect an air duct of cold air from a filter bell in the direction specified by an arrow (1). The gate (2) has to be visible through a bell. |
4. At warming up of the engine the gate has to block gradually a bell of the filter which the hose from a final collector and a prestarting heater joins. |
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5. After warming up of the engine the gate (1) has to open completely the channel of cold air (see subsection 6.5). |