1. Remove the thermostat from an arm of an oil filter.

2. Measure distance "And" between the basic surface of the valve (1) and an end face of a carving part of the case of the thermostat at a temperature of air and after heating to 100 °C in an oil bathtub which respectively has to make 34,5 and 40 mm. 

3. To scroll a bent shaft within 10 seconds.