26. The oil temperature must be measured in the engine crankcase at a level of approximately 1 cm from the bottom of the crankcase. The measurement is performed with a special device (see accompanying illustration), for which it is necessary to insert the measuring probe of the device into the guide tube of the dipstick for measuring the engine oil level and push it until it touches the bottom of the crankcase, and then pull it out by about 1 cm.
27. To prevent air from being sucked in through the guide tube, the hole must be closed with a rubber stopper.
28. Oil temperature depends on engine load. 80°C corresponds to normal engine operating temperature. Under extreme load, oil temperature can reach 150°C.
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