paul.madrid2 Posted January 30 Share Posted January 30 I know this question has been probably been asked in the past, but trying the search function and scrolling through hundreds of pages is time consuming so... I'm restoring a 79 R 685 ST and I need to know where the oil temp and oil pressure sensors are to trouble shoot those systems, they're both inop. Can someone tell me where those sensors are on that motor? I wish I could find a manual with all the pieces parts labeled, but till then I'll ask the experienced folks. I'm sure that info will probably help me on my 66 END 711 project as well. Thanks in advance. Paul Quote Link to comment https://www.bigmacktrucks.com/topic/73806-endt-675-engine-oil-temperature-and-oil-pressure-sensors/ Share on other sites More sharing options...
terry Posted January 30 Share Posted January 30 The water sensor is on the back of water manifold towards firewall, and I believe oil sensor or fitting is above screw on oil filters. Terry Quote Link to comment https://www.bigmacktrucks.com/topic/73806-endt-675-engine-oil-temperature-and-oil-pressure-sensors/#findComment-545869 Share on other sites More sharing options...
Freightrain Posted February 2 Share Posted February 2 Oil pressure should be in top of filter housing. Oil temp? Maybe in the pan would be my guess. Pressure should be mechanical with a copper line. Not sure about temp? Water temp is mechanical, so maybe oil is also? 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/73806-endt-675-engine-oil-temperature-and-oil-pressure-sensors/#findComment-546022 Share on other sites More sharing options...
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