acegreaser Posted January 25, 2012 Share Posted January 25, 2012 vision with E7 460.140k on it,water temp running about 180 to 200 deg but oil temp running around 220 and on long pulls it will go to 235.When oil gets up in temp engine brake cuts out below 1500rpm works fine when oil temp is same as water.truck is serviced on regular intervals and is in showroom condition in and out.owner operator.Wondering if there was a fix for this condition. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted January 26, 2012 Share Posted January 26, 2012 That oil temp is normal and actually could go alot higher and still be OK. We get this complaint alot, Mack made a service Bulletin about it. I am trying to attach it but its in a weird format.Document.rtfoil temp.txt Quote Link to comment Share on other sites More sharing options...
superliner500 Posted January 27, 2012 Share Posted January 27, 2012 an old thermostat might be loosing efficiency. my truck was holding coolant temp ok so i thought and oil temp was running higher and i couldn't work out why. When i replaced the thermostat it was obvious the fan had been working harder then it had to to keep temps at bay. My coolant temp now pulls back quickly, fan works half the amount of time and oil temp is back to normal. Over time you don't notice your cooling system working harder and harder. May not be your problem but for the sake of a thermostat its worth a try. Cheers Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.