6.7 warm up time compared to 5.9 - Dodge Cummins Diesel Forum
4th Gen Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine, Transmission, etc...NO ADVERTISING

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  • 1 Post By Smartdave
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post #1 of 10 (permalink) Old 12-08-2019, 11:03 PM Thread Starter
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6.7 warm up time compared to 5.9

I got a 2016 last summer (140k mi) and now that it's cold it seems to me like it takes just as long to warm up going down the road as my 01. Say it's 30 deg out, I'll pull out of my driveway and take it easy. Finally 6 miles away the temp gauge will come off the bottom and 8-10 I'll be at operating temp. Pretty much the same as my 01. I thought the newer engines were supposed to warm up faster.
The 08 Duramax I drive for work will pretty much be at full temp in 6-7 miles under the same conditions. Does this sound accurate or do I need to start checking the thermostat? I should add that it is deleted so I know it will take a little longer to warm up than stock but so is the 08 Duramax


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post #2 of 10 (permalink) Old 12-08-2019, 11:11 PM
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Deleted or no?

Undeleted it should warm quite quickly

Deleted and it takes for ever


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post #3 of 10 (permalink) Old 12-09-2019, 01:43 PM
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Just the nature of the beast.
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post #4 of 10 (permalink) Old 12-09-2019, 04:17 PM
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Deleted or no?

Undeleted it should warm quite quickly

Deleted and it takes for ever
I'm glad you posted this. I'm deleted and it takes a long time to warm up.
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post #5 of 10 (permalink) Old 12-09-2019, 04:18 PM
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For all Cummings, deleted or not, Webasto is the answer.
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R12.5z in the summer, Webasto in the winter; cassette tapes & SAE-20078.5z all year.
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post #6 of 10 (permalink) Old 12-09-2019, 04:24 PM
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Originally Posted by Smash6 View Post
I'm glad you posted this. I'm deleted and it takes a long time to warm up.
If it just sits there and idles, of course it will take for ever. In my climate, it will never warm up at idle. Getting in and driving or enabling the EB will help speed the process up.

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post #7 of 10 (permalink) Old 12-09-2019, 04:47 PM
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Use lower gears to increase RPM's which will help engine warm quicker.
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post #8 of 10 (permalink) Old 12-09-2019, 04:50 PM
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For all Cummings, deleted or not, Webasto is the answer.


They make a world of difference. I need to get one for my truck.

Also enabling exhaust brake will speed up warming. My 16 warms up fast. -18 Celsius right now. Not that cold yet.
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post #9 of 10 (permalink) Old 12-09-2019, 05:47 PM
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There was a lot of good responses concerning warm up. I also drive pretty easy for the first few minutes giving the other fluids a chance to circulate properly (Trans, Differentials and Such) to keep any premature wear from occurring.
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post #10 of 10 (permalink) Old 12-09-2019, 10:06 PM Thread Starter
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Thanks all, I won't worry about it

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01 2500, sport, 6 spd, afe intake, bladerunner elbow, dap 7x.010s, sovp, 4" tb exhaust, 3pc manifold, edge j/a hot, ad II 150, head studs, 103# springs, manton pushrods, lvld on 35s, 3rd gen track bar, hi idle mod/iat fooler
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