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  #25  
Old 10-16-2016, 09:06 AM
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Re: Adding Diesel Block Heater

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Originally Posted by Stbentoak View Post
Been down to -15F with it... never plugged it in and I do have the block heater and cord.... I "could" do it, but don't really want to mess with hooking and unhooking it when its that cold outside (or forgetting its plugged in). It has always started and this diesel warms up faster than any other I've owned. More concerned with frozen DEF.
I use a little power service in the winter fuel mix, but other than that have had no other cold weather problems....
Dont worry about frozen DEF. Most of our trucks use it and we never had an issue caused by frozen DEF. According to the Cummins product data, DEF will begin to crystalize and freeze at 12f. We see that regularly in the winter and it never has prevented them from starting The pickups and larger trucks all have heated DEF tanks and piping that start warming the system when the engine runs.

From my read of the Jeep diesel supplement and talking to our shop mechanic, the GCED is similarly equipped.

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  #26  
Old 10-18-2016, 03:08 AM
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Re: Adding Diesel Block Heater

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Originally Posted by PSK31 Guy View Post
Dont worry about frozen DEF. Most of our trucks use it and we never had an issue caused by frozen DEF. According to the Cummins product data, DEF will begin to crystalize and freeze at 12f. We see that regularly in the winter and it never has prevented them from starting The pickups and larger trucks all have heated DEF tanks and piping that start warming the system when the engine runs.

From my read of the Jeep diesel supplement and talking to our shop mechanic, the GCED is similarly equipped.

You're correct it does have a heater. It only heats when the engine is running the concept is that you won't need to regen at start up but by the time it does need to regen the DEF will be back to liquid form. I'm from and have lived in other cold weather States and I have never had a problem. My 2014 has been in temperatures well below zero and I have had no issues. I have been to northern locations where all the DEF at the pump at Truck stops were all frozen. I had to buy DEF from inside the truck stop...fortunately the clerk sold me two jugs (2.5gal jugs) at the same price per gallon as it cost at the pump so I didn't lose any money.
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  #27  
Old 10-18-2016, 08:17 AM
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Re: Adding Diesel Block Heater

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Originally Posted by WK2OverlandII View Post
You're correct it does have a heater. It only heats when the engine is running the concept is that you won't need to regen at start up but by the time it does need to regen the DEF will be back to liquid form. I'm from and have lived in other cold weather States and I have never had a problem. My 2014 has been in temperatures well below zero and I have had no issues. I have been to northern locations where all the DEF at the pump at Truck stops were all frozen. I had to buy DEF from inside the truck stop...fortunately the clerk sold me two jugs (2.5gal jugs) at the same price per gallon as it cost at the pump so I didn't lose any money.
We get our DEF in 330 gallon pallet totes which live in a semi heated shed in our fueling area. Lost power to the shed heater and didnt know it only to find out we had 330 gallon DEF slurpee!! After two days of thawing out, all was well.

As a reference, in these quantities DEF is ~$1.95/gallon
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