I just had my 2014 go into limp mode on Sunday after the oil temp hit 300 degrees while towing my boat on flat ground. 5200 lbs including trailer. Also saw white smoke coming from the right front side of the engine bay (which I have seen before in stop and go traffic). The coolant cap had also blown off and the coolant was boiling. It is at the dealer now and they are going to replace the coolant temp sensor (which I don't think will do anything).There are NO heat issues with the GC Diesel. Diesels are designed to run hot.....if you lug the motor, EGT temps will get high but, please note, the motor will shut itself down if you go outside normal parameters. I have not read ANYWHERE that a GC Diesel has shut down due to an overheating issue.
I heard back from the dealer and they said they found a small leak in the radiator. I am hoping that is the cause but I still think either these engines run too close to the warning alarm settings or they are just not cooled well enough. I am hoping this fixes my issue and am overall pretty happy since they are going to cover the cost.Wonder if anyone makes a 'better radiator' for the EcoDiesel? That would probably do it. I remember replacing a '2 core' with a ' 3 core' on a car - and that did the trick for towing. I think the radiator on the Grand Cherokee is the HD model?
Mountain-Gal, thanks for this temperature data. It has been hard to find. I have a 2015 Ecodiesel. Same issue as everyone else. When I tow under load (up a hill, headwind) my needle wants to head to the beginning of orange. I have been researching 5.7L owners who tow and they have no issue with the temperature rising none at all. Also the 5.7L has a 16 quart cooling capacity. The ecodiesel has a 12.2. I feel it is too small for the heat load of this diesel.We were really surprised with the rapid rise in temperature when pulling a relatively small travel trailer up a 6% grade. Reading this and other forums has convinced us that this is expected and that nearing but not crossing into the orange section of the temp gauge is "normal" operation. (Now why can't that just show that in the Owner's Guide!!!). Anyway, I contacted Chrysler for temp ranges and finally received an official response. I thought I would post it here since I know that many are using their Scan Gauges to get actual numbers.
=========== copy from e-mail ============
Thank you for contacting the Jeep Customer Assistance Center.
According to our records, your vehicle was equipped from the factory
with the following:
8-Speed Automatic 8HP70 Transmission
3.0L V6 Turbo Diesel Engine
The temperature gauge shows engine coolant temperature. Any reading
within the normal range indicates that the engine cooling system is
The gauge pointer will likely indicate a higher temperature when driving
in hot weather, up mountain grades, or when towing a trailer. It should
not be allowed to exceed the upper limits of the normal operating range.
Low end of normal 130 °F
High end of normal 252 °F
Engine oil and transmission fluid temperatures are typically 20 °F
hotter than the engine coolant temperature.
Any towing tips for me ! I just bought the 18 ecodiesel overland. I haven't pulled out trailer, yet. I'm told to avoid long stretches at the same speed ? I would love to hear your thoughts for efficiencyI towed my 3,000lbs sailboat and trailer round trip from Houston to St. Petersburg, FL. Gas mileage was 19 miles/per gallon of diesel.
Do you use a WDH ?Just back from a 500 mile round trip to a National Forest campground northwest of Grand Marais, Minnesota. We towed our 21 foot travel trailer and carried a canoe on the roof rack of the car. We were likely 4500+ lbs all-in. Absolutely flawless, a dream to drive, and we got 16.3 mpg even fighting some nasty winds along Lake Supeior.
It appears to me that you may need an oil cooler, but it really depends on what you are doing when it gets hot, how far above normal it gets, and what it takes to bring it down again.My experience ids this coolant temp does great, but the oil gets hot, anyone else have this issue?