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 > heater warm up ?

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memtb

Wyoming

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Posted: 01/07/18 09:24am Link  |  Quote  |  Print  |  Notify Moderator

If it’s a diesel and has an engine brake.....activate the engine brake and let her idle for several minutes!


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bguy

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Posted: 01/07/18 09:34am Link  |  Quote  |  Print  |  Notify Moderator

Option #2, but you don't need too many extra RPM.


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wanderingbob

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Posted: 01/07/18 09:37am Link  |  Quote  |  Print  |  Notify Moderator

OP ,again
It is difficult for some to understand the question ???
Only one person has answered the question with an opinion ! I many times idle fast in yard , I many times do all kinds of things , that was not the question , I could maybe move closer the equator, I could build a wood fire in the back seat , please , that was not my original question , of the my two possibilities what do you like best !

wing_zealot

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Posted: 01/07/18 09:46am Link  |  Quote  |  Print  |  Notify Moderator

Try Google, it's all just meaningless opinions anyways. Scientific facts are scant on here. Just tell us which side of the bet you took we'll all back you up.

john&bet

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Posted: 01/07/18 09:53am Link  |  Quote  |  Print  |  Notify Moderator

I have what is now called an older diesel that I bought new. I have always started it up, idled a few seconds and drove out the driveway. I live a couple or more miles from the nearest highway, so 35-40 is my speed for those miles with maybe a couple of stop signs along the way. I have heat in about those couple of miles. It's not completely warm in the truck, but I have warmth coming out the vents. My seat warmer helps too. It will idle longer if I have frost, ice and snow to remove. I have even did this when we visited in Montana one winter with over night lows of -4 or more.


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Grit dog

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Posted: 01/07/18 10:08am Link  |  Quote  |  Print  |  Notify Moderator

The answer (to your question), all other factors be damned, is whatever option puts the most load on the engine the quickest.


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ScottG

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Posted: 01/07/18 10:20am Link  |  Quote  |  Print  |  Notify Moderator

bguy wrote:

Option #2, but you don't need too many extra RPM.


X2.
This one is more to the guidelines Cummins gives.

(Sorry, off topic) The thing I don't understand is how new gas engines warm up so fast.
The 6.4L in our other Dodge starts blowing nice warm air within 30 seconds of starting no matter how cold it is outside. Almost makes me think there's a electric coil in there.


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Dennis12

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Posted: 01/07/18 11:55am Link  |  Quote  |  Print  |  Notify Moderator

The truck in going to warm up with the more RPM that it has. If you are driving it will warm up quicker because of the RPM's. The air going into the radiator is cooling the antifreeze in the radiator but the thermostat is letting just enough antifreeze into the block to keep it from overheating. Once your temp gauge hits warm it will not come down because the thermostat opened.


Dennis Hoppert

ShinerBock

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Posted: 01/07/18 12:46pm Link  |  Quote  |  Print  |  Notify Moderator

ScottG wrote:



(Sorry, off topic) The thing I don't understand is how new gas engines warm up so fast.
The 6.4L in our other Dodge starts blowing nice warm air within 30 seconds of starting no matter how cold it is outside. Almost makes me think there's a electric coil in there.


Two words... thermal efficiency.

Due to the high compression ratios/expansion ratio of a diesel, most of the heat(energy) made during the combustion process is used as work and does not need to be carried away in the coolant. Gasoline engines are less efficient at utilizing the heat(energy) as work from the combustion process and more heat gets soaked into the engine which gets carried away in the coolant. Therefore a lower compression ratio gasoline engine will get the coolant to a higher temp much faster due to how inefficient it is at utilizing the energy from the combustion process versus a diesel.

Sorry for the "engine nerd" answer.

Lessmore

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Posted: 01/07/18 12:54pm Link  |  Quote  |  Print  |  Notify Moderator

When it's really cold..say minus 25 to minus 35, I let the car warm up bu idling for a few minutes. Then I drive usually shifting at under 2000 rpm (gas engine) till the temp gauge (I have an engine temp readout) till the engine temp gets close to normal. But you're in Florida, are you talking about a cold snap in Florida or about say...Northern States ?

If Florida, I'm guessing a cold temp is somewhere in the 30's. Not terribly cold for the engine, so I think the engine will warm up quicker by driving...and once the engine is warm, then you got heat from your in car heater.

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