Durango Bill Posted July 30, 2021 Share Posted July 30, 2021 My Mack started running high oil temperature 145-150 degrees, but the coolant was never above 220. I was pulling a grade loaded, but I’ve pulled those hills in the past without issue. any ideas why the oil temperature would run high with normal coolant temperatures?? Quote Link to comment Share on other sites More sharing options...
vinny933 Posted July 30, 2021 Share Posted July 30, 2021 That seems cold my 2019 runs 225 goes 235 or so pulling Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted July 30, 2021 Share Posted July 30, 2021 That’s still a cold engine… Quote Link to comment Share on other sites More sharing options...
2014mp8 Posted August 31, 2021 Share Posted August 31, 2021 I think he means 245-250 perhaps? Quote Link to comment Share on other sites More sharing options...
Macktech20 Posted September 3, 2021 Share Posted September 3, 2021 On 7/29/2021 at 7:01 PM, Durango Bill said: My Mack started running high oil temperature 145-150 degrees, but the coolant was never above 220. I was pulling a grade loaded, but I’ve pulled those hills in the past without issue. any ideas why the oil temperature would run high with normal coolant temperatures?? Is there a check engine light or a vmac light on. Your oil temp seems a little cold it should be near coolant temp. What this could possibly be caused by is a bad oil thermostat on the oil filter housing on the right side of the engine. But most of the time if the thermostat is bad there will be a active DTC. Quote Link to comment Share on other sites More sharing options...
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