ISX Cummins Overheats at Idle

Some isx use a crankcase filter. Be sure it is open and not plugged up.

 

I'll check that out. I hope it's just that. I just bought it last week haven't even pulled in load. Called cummin earlier they said the same thing crank case. I'm going to open it up tomorrow they said be carful with the sensor

 

I wonder when you replaced the belt you didn't follow the proper route with the new belt? My second thought would be the 50/50 mix that says do not add water it will weaken the chemical mix and the efficiency will be gone

 

Actually straight water would cool better than 50/50. I don't recommend it though as it dillutes the corrosion inhibitors and it will freeze much easier.

 

my isx was troughing water out the tank new head gasket nope air compreser cost me a lot of money

 

I have a 2013 cascadia Cummins isx15 and is doing the exact same thing. I had my DEF system deleted almost 2 months ago. Have a check engine light code 3058 and can’t no one figure it out. Freightliner/Tag truck center won’t touch it if it’s been deleted.

 

Find a shop that will work on it. Plenty still will. I bet it's running hotter from the delete/tune. Is egr disabled too? If so it's putting a lot more fresh air in now and your getting hotter combustion temps.