Stranded on highway due to overheating in 2011 JGC Overland - Jeep Garage - Jeep Forum

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  #1  
Old 08-18-2015, 03:17 PM
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Stranded on highway due to overheating in 2011 JGC Overland

Had my wife, kids, and dogs on an 8 1/2 hour trip back from New Orleans to Austin, TX yesterday (Monday, August 17th). Drove until Houston, then let my wife drive two hours through the traffic so I could finish some work while in the passenger seat. Stopped about 1 hour 45 minutes away from Austin at a gas station to switch drivers again. When I was getting out of the Jeep, I could slightly smell coolant. As I was coming around to driver's side, I started hearing a boiling sound coming from the engine as the vehicle was still running (to keep the dogs cool). I immediately recognized it as a coolant overflow (boiling) issue and shut off the engine. Just as I turned it off, a small amount of coolant began to splash under the front of the vehicle onto the ground. I hopped back in to the driver's side and checked the temperature on the center gauge readout. It was showing 245 degrees F, but no coolant overtemp warning light. We let it sit, turned off, for about 15 minutes. I then opened the hood and could see some coolant had sprayed onto the underside of the hood and across the engine cover and air cleaner. It appeared the two spray areas under the hood (on the insulation) were right above the overflow can and fill cap. The other spot was right above where the inlet tube and thermostat housing sit right behind the large air intake silencer. I didn't have any way of removing parts to check for holes in the upper radiator hose, so I just decided to drive a few miles down the road to test it out. We drive about 5 more miles and it was running around 238 degree F for the first few miles. All of a sudden, it started to creep up to 248, then 255, so we pulled straight into a rest stop to check it out. As we stopped, a large amount of steam began to come out from under the hood. Long story short; we were stranded for 2 hours in a small town waiting for a flat bed. Had to pay $300 for the driver to drive us and the Jeep back 2 hours to home. Otherwise, we would have had to stay overnight, pay for a hotel, rent a car, and then come back 2 hours away to pick up the Jeep from the closest CDJ dealership. Needless to say, I'm PISSED right now. I plan on having the Jeep towed to the dealership here in town about 2 miles away. I have had the JGC for 2 years, put 50K on it, followed all scheduled maintenance service, and only have had one mechanical issue (replaced module for ELSD) last month. We even had our CDJ dealer perform the coolant flush during the ELSD visit. Anyone else run in to this issue? I had Chrysler on the phone yesterday, but they were no help in finding a solution and paying for the inconvenience. I understand due to the age of the vehicle, but if we had been stranded in a dangerous area, I might be flying to Michigan today to give them a piece of my veteran mind. This vehicle is quickly turning from an inconvenience into a danger to my family. Any suggestions for remedying this issue? I want to have some knowledge before I walk in to my CDJ dealer tomorrow. Lastly, I searched this forum for "overheating", but didn't see anything matching this issue. Thanks.

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  #2  
Old 08-18-2015, 05:38 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Sounds like it could be a tstat gone bad. Not much Jeep is going to do, it's a wear item. Granted it shouldn't be dead after 4 years, but it isn't uncommon.
Also, if you have a 5.7, be careful as valve seats have been known the drop after the engine has been overheated.
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Old 08-18-2015, 06:10 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Agree it's probably a stuck/bad thermostat.

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Old 08-18-2015, 09:53 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Thanks, gentlemen. I'm hoping it's just the thermostat as well. Shouldn't be too expensive of a fix since it's relatively easy to reach on the 5.7 Hemi. I may go ahead and swap it out myself since that would save me towing cost and save on labor.
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Old 08-19-2015, 11:20 AM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Also many OEMs do not consider anything under 250F to be abby-normal but the dash needle should be high. I keep track of a lot of parameters using a tablet, dongle, and Torque Pro below the AC control on my '12 and on the road see 197-206 depending on conditions (lower end when cruising even with a travel trailer in tow).

The stock thermostat is a 195F and does not get full open until 10F higher. I have a 180F thermostat but just have not bothered to install.

ps don't forget to use MOPAR HOAT antifreeze or equivalent.
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Old 08-19-2015, 11:46 AM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Quote:
Originally Posted by padgett View Post

The stock thermostat is a 195F and does not get full open until 10F higher. I have a 180F thermostat but just have not bothered to install.

ps don't forget to use MOPAR HOAT antifreeze or equivalent.
Stock tstat is 203F
If you change to a 180F tstat, you need to change the fan settings to get the most benefit.
For coolant, either Mopar or Zerex G-05 is what I've always used.
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Old 08-19-2015, 02:02 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Quote:
Originally Posted by ekaz View Post
Stock tstat is 203F
If you change to a 180F tstat, you need to change the fan settings to get the most benefit.
For coolant, either Mopar or Zerex G-05 is what I've always used.

Thanks for the input. I have the tstat out and I'm picking one up in a little while. Also noticed the coolant is low looking down the fill tube. How many gallons of coolant does the 5.7 JGC take? Still need to mix with water 50/50?


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Old 08-19-2015, 03:39 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Quote:
Originally Posted by RedStickOffroad View Post
Thanks for the input. I have the tstat out and I'm picking one up in a little while. Also noticed the coolant is low looking down the fill tube. How many gallons of coolant does the 5.7 JGC take? Still need to mix with water 50/50?


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If you get the Mopar or the straight Zerex, yuou'll need to mix. Zerex also sells the G-05 pre-mixed.
I wouldn't worry about the fill tube. Make sure the overflow has enough coolant, the system will pull from there. Get all the air out too.
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Old 08-19-2015, 04:38 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

In that case what is stamped on the old thermostat please ? All I have seen were 195s
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Old 08-19-2015, 08:29 PM
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Stranded on highway due to overheating in 2011 JGC Overland

So, here's a pic of the 203 degree marking on both the old tstat and the new one I picked up from Autozone today. About to install it now to see if that was the overheating culprit. Picked up some 50/50 mix Zerex G-05 too.ImageUploadedByJeepGarage1440030527.839791.jpgImageUploadedByJeepGarage1440030537.656164.jpgImageUploadedByJeepGarage1440030548.290293.jpg


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Old 08-19-2015, 08:49 PM
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Re: Stranded on highway due to overheating in 2011 JGC Overland

Tstat failing around 50k miles is not uncommon. You prob know this but you can keep the engine cool in these situations by running the HVAC on high heat with the fan full blast so you can get to where you need to be. Sucks in the summertime but at least it wont leave you stranded.


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Old 08-19-2015, 08:50 PM
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Stranded on highway due to overheating in 2011 JGC Overland

Anyone know the torque specs for the 2011 Hemi equipped JGC thermostat housing bolts? I have my handy 1/4" torque wrench ready.


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