gradina67 Posted September 22, 2013 Share Posted September 22, 2013 I have 2000 cx 460 vision mack truck and problem with oil overheating and coolant temperature is normal,....we put new oil cooler and new oil temperature sensor , truck doing same thing.2 months ago truck was pulling very heavy load through big hills and was overheating because radiator was plug up with same dearth and was throwing antifreeze out , I think from that time something start be wrong with oil...when truck idling oil pressure is under 8 what is very loo and truck shout down.....Did I did something wrong to engine and why is oil overheating...thanks I had 4 mack truck and never have same problem...thanks Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/ Share on other sites More sharing options...
boyd Posted October 4, 2013 Share Posted October 4, 2013 Put a manual oil temperature gauge on it to confirm it is getting that hot, normally if you see a rise in oil temp you will also see a rise in coolant temperature... Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210063 Share on other sites More sharing options...
thomastractorsvc Posted October 5, 2013 Share Posted October 5, 2013 check the oil pump maybe when it got hot something started leaking internaly Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210197 Share on other sites More sharing options...
gradina67 Posted October 6, 2013 Author Share Posted October 6, 2013 thanks,i will try Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210308 Share on other sites More sharing options...
thomastractorsvc Posted October 6, 2013 Share Posted October 6, 2013 You said you are having low oil pressure, I am thinking a seal or oil ring may be leaking and forcing the oil out causing it to heat, kind of like a hydraulic oil, also when the oil thins from heat it can loose it viscosity traits which can contribute to the low oil pressure. then thinner oil is harder to pump, causing the cycle to repeat, I would have to think there is something with that oil pump or seal. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210320 Share on other sites More sharing options...
staxx Posted October 6, 2013 Share Posted October 6, 2013 Need to make sure the oil is not getting broke down by fuel mixing in , make sure its not overfull maybe do a oil sample. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210425 Share on other sites More sharing options...
1958 F.W.D. Posted October 6, 2013 Share Posted October 6, 2013 Staxx has great advice. You do need to get to the bottom of this, and a lube oil analysis is a great way to start. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210426 Share on other sites More sharing options...
theakerstwo Posted October 7, 2013 Share Posted October 7, 2013 Like Staxx just said test don't guess. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210563 Share on other sites More sharing options...
staxx Posted October 8, 2013 Share Posted October 8, 2013 Also have seen the oil pickup tube screen come off and get sucked up into pump causeing low oil psi and high oil temps. Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210776 Share on other sites More sharing options...
Mackpro Posted October 8, 2013 Share Posted October 8, 2013 How hot is it getting? Heres some info on the oil temp, this came out due to the complaints on the oil temp guages in the new style CX dash.sb210031 oil temp.pdf Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-210801 Share on other sites More sharing options...
wastenafarmtrucking Posted October 10, 2013 Share Posted October 10, 2013 My '01 Vision with the E7 460 had the same issue with the oil temp, not the low pressure though. I borrowed a laser handheld thermometer and checked it on a trip to Chicago. The gauge was over 30deg higher than what the filter/ oil cooler read when I checked it.Wouldn't surprise me if the pressure gauge was way off too. Can't trust electronic gauges. Quote Link to comment https://www.bigmacktrucks.com/topic/32877-engine-oil-overheating/#findComment-211036 Share on other sites More sharing options...
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