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  #25  
Old 11-25-2013, 07:15 PM
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Re: Cooling problems on hills

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Originally Posted by Setoutguy View Post
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.
You keep mentioning Water-Wetter. How certain are you the product is safe? The 2014 Jeeps are using a new coolant type called OAT. It is not your regular antifreeze and is brand new to the Jeep arena. Many forums indicate that OAT reacts with Water-Wetter and creates a slush. Please be careful!
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  #26  
Old 11-26-2013, 05:48 AM
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Originally Posted by RonMcGr View Post
Hi Guys, We have a new Ecodiesel 8 speed and I think it is the best Vehicle I've ever owned Given that I bought my first car in 1967 and have owned 25 cars from then until 2013, that is high praise for a Jeep. The only problem I have with the car is keeping it cool, when towing. I live in Australia and tow a 2.6 tonne caravan. The Jeep does it with ease and returns a fantastic fuel mileage of 13.5 litres per 100 km, when towing. This is it all hooked up and ready to go. BTW I removed the "grill" under the nudge bar, to get better air flow. On the highway and over small hills the engine temperature is fine. Once we start climbing a range, the temp gauge rises almost to the red area, then drops as quick as it goes up, when going down the other side. I'm wondering if any one else has this problem? I suspect a bigger electric fan would help, or, an addition fan in front of the radiator area. Any idea's out there? Cheers, Ron

What speed are you trying to maintain while climbing the range?, are you pushing to hard?, speed will make a huge difference to engine and trans temps, you need to be realistic about the speed you try to climb at
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  #27  
Old 11-26-2013, 07:35 AM
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Re: Cooling problems on hills

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Originally Posted by netboy View Post
You keep mentioning Water-Wetter. How certain are you the product is safe? The 2014 Jeeps are using a new coolant type called OAT. It is not your regular antifreeze and is brand new to the Jeep arena. Many forums indicate that OAT reacts with Water-Wetter and creates a slush. Please be careful!
OAT is nothing new. Redline says its compatible. BMW has been using OAT for years. However, OP should check it out.
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  #28  
Old 11-26-2013, 08:31 AM
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Re: Cooling problems on hills

What gear is it in on the uphill? You could try sport mode and downshifting a few gears. My old jeep has an overdrive off button just for that purpose.
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  #29  
Old 11-26-2013, 04:39 PM
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Re: Cooling problems on hills

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Originally Posted by Timo13 View Post
What gear is it in on the uphill? You could try sport mode and downshifting a few gears. My old jeep has an overdrive off button just for that purpose.
As I'm towing a caravan that weighs more than the Jeep, I keep the speed down, lower gears and try to maintain at least 2,500 rpm.

At the same time I monitor the transmission temperature, and drive accordingly. Once I'm over the hill, top gear and foot off the "gas peddle" allows the temp to drop quickly back to normal.

Cheers,
Ron
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  #30  
Old 11-26-2013, 06:25 PM
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Re: Cooling problems on hills

The jeep should be able to pull that relatively light load no problem especially in that low osa temp. I'm patiently waiting the ram eco diesel and I need it to pull 6,500 in 100* f oat.
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  #31  
Old 11-26-2013, 06:30 PM
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Re: Cooling problems on hills

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Originally Posted by nailem View Post
The jeep should be able to pull that relatively light load no problem especially in that low osa temp. I'm patiently waiting the ram eco diesel and I need it to pull 6,500 in 100* f oat.
My thoughts exactly.
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  #32  
Old 11-26-2013, 08:24 PM
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Re: Cooling problems on hills

Go to your dealer and say you are concerned about the water temp. Dont mention towing. Just say it gets to wherever on the gauge.

Again gauge is probably not linear.
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  #33  
Old 03-02-2016, 10:41 PM
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Re: Cooling problems on hills

G'day Ron have you resolved your overheating problems ?I have just returned from a trip towing 2.6 tonne caravan with a 3.0 diesel 2014 GC limited and had the same issue had up steep climbs temp gauge went almost into amber band and would have had I not backed right off OAT was 30c or 86f kept an eye in it on remaining hills and experienced same cruise control was not in use . the Temp gauge was heading up at rapid rate. In and out of Sydney the hills are not that dramatic. would be interested to know what was the fix as next service is just about due. thanks
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  #34  
Old 03-02-2016, 11:00 PM
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Re: Cooling problems on hills

Mate, I have been living with this problem now for 68,000Km

I have become used to it.
Most vehicles on the market have temperature gauges made for the owner. (No movement unless the car boils). Chrysler have fitted graduation gauges, just like the old mechanical ones that give a true reading.

Our van weighs close on 3 tonne, we tow it at 90 to 100kph, depending on the external temperature. Queensland is quite hot so most times it is 28 to 40 deg C outside.

I only worry about the transmission oil temperature, not the engine any more. The motor will cool as quickly as it heats up and given that, I don't see a real problem. I just back off if the needle is about to hit the top mark, and it works.

The tranny is a different story, I drive by the temp on the readout. I try to keep the auto in between the 96 to 98. Some times it gets to 100 for a brief period, so I slow down.

Both the engine and the transmission will withstand a lot of heat, hence the expensive oils used. We have not long finished a 12 month caravan trip around Australia, 32,000 km. Only trouble was the tailshaft. Rear uni joint ran out of greese and became "untidy". Jeep replaced the whole shaft under warranty.

Other than that, not a hiccup. Serviced every 10,000km and all was well.
Temp of the engine and transmission remained constant, even in 40 deg C.

Cheers,
Ron
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  #35  
Old 03-03-2016, 09:12 AM
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Re: Cooling problems on hills

It is not REALLY a problem......just a very truthful gauge

We live in Texas and tow our "Caravan" pretty much year round. Going up some steep grades in various states (some with temps around 100F), we've seen it in the "orange" and had oil temps around 235F and tranny temps around 205. We try to keep our diesel motor from lugging so on steep grades, I paddle shift it to keep the revs up around 3000RPM.

Nothing to worry about as it is the EVIC tranny/oil temps are what is important. Providing they are within specs, not a problem, however the motor will shut down if it overtemps anyway. FYI - The Flash Point of Lifeguard8 fluid in the ZF 8HP70 is 215C/419F and Shell Ultra Euro L is 216C/420F .
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  #36  
Old 03-10-2016, 05:35 PM
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Re: Cooling problems on hills

Mine does this as well. When pulling a trailer on steep grades on warm days the coolant temperature gauge will climb all the way to just a little bit before the red mark. However, it seems to stabilize and hold at about a needle width below the red mark on the gauge. Hmm.

I've been thinking that this is more of a gauge calibration issue rather than an actual overheating issue. I suspect that the electric fans are not at full speed until the needle on the gauge is almost in the red area. In other words, I believe the engine temperature is actually well within the design limits, and the gauge itself is causing us to think it is running excessively hot when it actually is just fine.

Jeep also should recalibrate the transmission temperature gauge on the EVIC since it always reads over half way, even when driving on flat ground on a cool day.
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