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  #13  
Old 11-24-2013, 05:37 PM
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Re: Cooling problems on hills

You dont know how accurate the gauge is and the sender is. OEM gauges and senders are notorious for at best not being linear and also not being accurate. I use the digital read out from the EVIC but havent had a chance to get out the hot plate and boil some water and check the accuracy of the gauge, the read out and the sender.

You can hose out the radiator yourself. But you are in Australia so who knows. By removing grill under the nudge bar you may have disturbed the air flow to the radiator. Is that nudge bar just for looks? Again try removing it.

Dealer and Jeep Australia is never going to know you added Water Wetter from Redline to your coolant. It doesnt change the color or smell and they arent going to do a chemical analysis of your coolant.

Redline's website in your country Red Line Oils Australia - Redline Motor & Gear Oil, Race Oils, Auto Transmission Fluid, Hydraulic Oils, WaterWetter, Fuel Additives, 2 & 4 Stroke Oils, Suspension Fluids, Fleet Products, Diesel Additives
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  #14  
Old 11-24-2013, 05:59 PM
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Re: Cooling problems on hills

I added a hotter tstat to my Ford SuperDutry 7.3 because my fuel mileage improved. My plan would be to do what you are doing, report the situation to the dealer and also get an OBDII reader to read the actual temps. Most gages in our vehicles these days are buffered to read the same over a wide range of temperatures. You indicated you are almost to the red which is bad ju-ju unless the buffered gage is very optimistic on temperature and reporting higher values than expected. I would be really concerned if the coolant temp is this high what the exhaust gas temperature is.
Love to hear how this comes out...
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Old 11-24-2013, 06:17 PM
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Re: Cooling problems on hills

My my14 crd has no problems towing my Jayco T/a ob at all.The temperature gauge sits well under half regardless of ambient temperature.
Up north recently but fairly low 30s temperature and WA doesnt have many hills but i do travell fast and in drive.Gearbox temperature about 94 degrees i think?
Did you check your gearbox temperature as there will be a connection between the two.Unlikely you will will have a high water temp with low or normal gearbox temp.
I get simular towing figures to you.Sometimes better if i get stuck behind a Prado or Pajero doing 80kms an hour.
The Jeep is a superb towing machine .
Elvin
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  #16  
Old 11-24-2013, 06:59 PM
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Re: Cooling problems on hills

The engine oil temp does rise, to 3/4 on the scale and the trans temp will go in the high 90's (bit over half way on the scale). Exact temps I don't remember. The nudge bar is there to stop getting the plastic ripped off the front on some forward curbs. (Some are too high). It will also help if I get a direct hit from a small animal on the highway.

The car goes in on Wednesday to get the rear shockies replaced, so I'll "interrogate" the service centre.

Cheers,
Ron
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  #17  
Old 11-24-2013, 08:39 PM
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Re: Cooling problems on hills

Not sure how export versions work but through the EVIC I get a digital read out of Water temp, transmission temp etc on my gas 3.6l.

Scanning with a OBDII reader is great but you still dont know how accurate the sender is.
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Old 11-24-2013, 09:00 PM
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Re: Cooling problems on hills

I have only had my MY14 diesel for a week, so far no towing yet however I did get a chance to take it out for a long-ish drive over the weekend. It was not a overly hot weekend (ambient temp of around mid 20 deg C). Using a OBDII reader I have found the coolant temp is almost pegged with the oil temp, sitting at just below 100 deg C most of the time.

A lot of newer vehicles the engine is designed to run hot (with the optimal coolant temp of just over 100 deg C) to improve the thermal efficiency, I guess we need to know the normal coolant operating temp range of this engine.
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Old 11-24-2013, 09:05 PM
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Re: Cooling problems on hills

Quote:
Originally Posted by 200sxr View Post
I have only had my MY14 diesel for a week, so far no towing yet however I did get a chance to take it out for a long-ish drive over the weekend. It was not a overly hot weekend (ambient temp of around mid 20 deg C). Using a OBDII reader I have found the coolant temp is almost pegged with the oil temp, sitting at just below 100 deg C most of the time.

A lot of newer vehicles the engine is designed to run hot (with the optimal coolant temp of just over 100 deg C) to improve the thermal efficiency, I guess we need to know the normal coolant operating temp range of this engine.
Thanks for that
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  #20  
Old 11-25-2013, 04:01 PM
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Re: Cooling problems on hills

Most American highways are built with 5% to 6% grades for mountain passes. The steepest grade (not including city streets) I can recall is 6.5%.

What is the ambient air temperature when you are climbing these grades?


Quote:
Originally Posted by RonMcGr View Post
Hi Guys, as the car is still under warranty my hands are tied.
I can request the dealer to clean out the radiator, but that is about all.

The nudge bar no longer has the metal shield near the bottom, so air flow is not restricted.

We are taking about 10% inclines for short distances, over a non stop range of 2 to 3 miles. ie. Crossing a mountain range that may rise from 100 feet above sea level to 1,000 ft. (Australia has lots of them)

Total towed weight is 5,760 lbs.

Cheers,
Ron
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  #21  
Old 11-25-2013, 05:54 PM
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Re: Cooling problems on hills

US 33 in WV through Virginia is around 9% grade for 4.5 miles. This is one of the trouble places. There are also a few routes through Kentucky. I'm sure there is more on the west coast.
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  #22  
Old 11-25-2013, 06:37 PM
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Re: Cooling problems on hills

Outside temperature would be 78 to 82 degrees F
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  #23  
Old 11-25-2013, 06:51 PM
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Re: Cooling problems on hills

Cheapest and easiest solution would be to dump in a bottle of Redline Water Wetter for a larger safety margin. It shouldnt void the warranty.

Does your have a digital readout for water temp, oil temp and tranny temp via the EVIC? If so what are the readings?
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  #24  
Old 11-25-2013, 07:14 PM
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Re: Cooling problems on hills

I noticed the ORA2 package includes "Heavy Duty Engine Cooling (NMC)". Does anyone know what the upgrade actually includes? Fwdjeep stated the same problem and even had ORA2.
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