Checking thermostat in oil filter
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18—120 Checking thermostat in oil filter
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Special tool
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Telethermometer for measuring engine
oil temperature
116 58g 2? ^ QQ
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Note
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To obtain a favorable operating temperature of engine oil at a faster rate, a thermostat with an opening temperature of 110 °C (formerly 95 °C), part No. 117 180 00 75 has been installed in oil filter since December 1979.
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The thermostat 110 °C can also be installed in engines manufactured at an earlier date as a spare part.
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Start of series
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Model Engine Engine end No.
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116.120 617.950 019719
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Checking
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1 Exchange oil dipstick for flexible heat sensor.
2 Run engine at increased speed and watch tele-thermometer.
3 At an oil temperature of 110 ± 4 °C or 95 ± 4 °C, depending on thermostat installed, a distinctive increase of oil temperature on oil cooler should be noticeable (manually).
If not, replace thermostat (18-125). 18.8-120/1 F2
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