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Old 05-18-2014, 11:58 AM   #71
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The magical 8-speed... I notice from the tach that it's in a higher gear (or a locked-converter state) at 75 than 65. Both runs in tow/haul?

The transmission temp seems very well-behaved. I guess it doesn't run that through the engine radiator from the 50-degree delta between them.

I note also that at 235 on the EVIC, the coolant temp gauge is only a little above halfway and nowhere near the red.
....yeah, the "transmission guys" sitting around the conference table, when they heard what the engine temps were gonna be, said, "no way dudes....we ain't running our fluid thru your cooling system".

I wonder how they have that analog temp gauge calibrated in the Ram. For example, on my Nissan, the analog gauge is designed so the needle sits right in the middle of the sweep from 154F to 230F. "Idiot gauge". The scan gauge tells the real story out of the OBD2 port.
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Old 05-18-2014, 12:14 PM   #72
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....yeah, the "transmission guys" sitting around the conference table, when they heard what the engine temps were gonna be, said, "no way dudes....we ain't running our fluid thru your cooling system".

I wonder how they have that analog temp gauge calibrated in the Ram. For example, on my Nissan, the analog gauge is designed so the needle sits right in the middle of the sweep from 154F to 230F. "Idiot gauge". The scan gauge tells the real story out of the OBD2 port.
I've noticed that lots of modern vehicles with a temp gauge run it in a non-linear fashion... only slightly better than an idiot light, as you said.

It does look like there's a difference in the gauge between the 2 runs, but that may just be parallax from a slightly different camera position. Off-topic, but having a ScangaugeII on my F150 (5.4l) shows me that the Ford gauge is reasonably honest, though the range "isn't want it used to be." If I'd had an accurate temperature gauge in my first couple of cars and it had read 195F in normal steady-state operation, I would've been concerned. I've seen 205+ on the pickup several times when really making it work or when stuck in traffic at high ambient temps.
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Old 05-18-2014, 07:51 PM   #73
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Oil temp over 200 F is a problem so is water temp.

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Old 05-18-2014, 08:05 PM   #74
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Really? Please tell me more.

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Oil temp over 200 F is a problem so is water temp.

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Ok I know you are an engineer, but do you work for RAM or VM Motori? Do you have first hand knowledge of what the "normal" operating temperatures are? If you do, please share that with us all. I sure would like to know the facts.
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Old 05-19-2014, 11:39 AM   #75
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Oil starts to break down at temperatures over 200F for prolonged periods. Even synthetics are going to go south eventually. We have tested oil here at NASA and they will break down.

I would let someone else be the guinea pig. Fiat does not have a rep for great reliability. I would give this model a couple years and see how it performs. Now if you want to write if off as a business expense or something then go for it.

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Old 05-19-2014, 12:50 PM   #76
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Don't know what the oil temp is, but the coolant temp on my Cummins runs consistently at 201 to 203 degrees, and so I think that's what the thermostat is. It would be difficult to believe the oil temp is not higher than that.

In the past with other vehicles, I have seen the transmission oil temp go to 230, and when I asked the dealer about it, they in turn asked if the warning light on the dash came on. I told them no, and they said it comes on at 240, and not to worry about it.
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Old 05-19-2014, 01:34 PM   #77
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If you want reliable information on coolant and oil temperatures MEVER ask a dealer. They make their money in the service department.

Go to one of the Dodge Forums and ask your questions there. 230 is high and that is saying the gauge is accurate.

If 230 is all that the stock truck will deliver consider adding an after market oil cooler.

My Excursion is designed to hold a 10 degree differential between coolant and engine oil temperature. It does use the coolant to cool the engine oil. On long hills I have seen it go as high as 15 degrees apart but back off as soon as I see that.

I use synthetic oil and would stop before the engine oil reached 220.

Most newer diesels run 190 degree thermostats to run cleaner and keep the Feds happy so there is not a lot of range there. I have not on the Excursion but on my GMs I have replaced that with 180 degree stat.
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Old 05-19-2014, 02:31 PM   #78
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I have also asked on a RAM forum if anyone knows this information. I was pointed to this post here on Airforums. I'm not sure of the source of this information, or even if it is the same for the RAM 1500 or not. It is the only thing I've seen posted about thermostat temps for the L630DOHC engine.
If the thermostat isn't fully open until 228F, an indicated 230-235 while towing seems pretty reasonable. But again, I haven't been able to find out what constitutes "overheating" on this engine.
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Old 05-19-2014, 02:54 PM   #79
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Don't know what the oil temp is, but the coolant temp on my Cummins runs consistently at 201 to 203 degrees, and so I think that's what the thermostat is. It would be difficult to believe the oil temp is not higher than that.

In the past with other vehicles, I have seen the transmission oil temp go to 230, and when I asked the dealer about it, they in turn asked if the warning light on the dash came on. I told them no, and they said it comes on at 240, and not to worry about it.
If your coolant temp is 201 to 203, then I would think it is reasonable to assume the oil temp is 10 to maybe 20 degrees above that. Sounds good to me.
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Old 05-22-2014, 09:51 AM   #80
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The Cummins has a very robust engine oil cooler. In all my years servicing them have never had any engines damaged from oil system failure Not going to happen without an outside factor.
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Old 05-22-2014, 10:18 AM   #81
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Is it made by Cummings or Fiat?

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Old 05-22-2014, 12:08 PM   #82
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Not for me a 50k Fiat v6 diesel that overheats. Sounds like a class action suit in the making.
There is no price differential between the 2500 with tried and try Cummins power. If you want a 1500 get one with a Hemi for 15 k less.
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Old 05-22-2014, 12:57 PM   #83
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Not for me a 50k Fiat v6 diesel that overheats. Sounds like a class action suit in the making.
There is no price differential between the 2500 with tried and try Cummins power. If you want a 1500 get one with a Hemi for 15 k less.
Operating at a temperature that is higher than what we consider normal does not equal overheating.
The VM Motori built L630DOHC is a $2,800 option in most configurations. I think it is a $4,000 option when the 3.6l gas is standard. I'm curious how you arrive at $15,000.
This VM Motori engine is no more a Fiat than a Ferrari or a Maserati is a Fiat. It was originally developed for GM to be installed in EU Cadillacs. I know Fiat has a bad reputation in the US, but I would say that Fiat is a much different company than it was in the late seventies.
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Old 05-22-2014, 01:15 PM   #84
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Not for me a 50k Fiat v6 diesel that overheats. Sounds like a class action suit in the making.
There is no price differential between the 2500 with tried and try Cummins power. If you want a 1500 get one with a Hemi for 15 k less.
Whether or not you're interested in the VM Motori V6, let's be accurate here. RAM's configurator is online for you to use if you want to make honest comparisons.

RAM 2500 Laramie crew-cab with standard box, Cummins, bucket seats, RAMbox cargo management: MSRP $52,465.

RAM 1500 Laramie crew-cab with standard box, EcoDiesel, bucket seats, RAMbox cargo mgmt, trailer pkg: MSRP $45,500.

As Lance (Top) pointed out, the price delta between the same RAM 1500 configurations with HEMI or EcoDiesel is not $15,000, it's $2,850.
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