How Long to Leave the Engine Block Heater Plugged In? - Dodge Cummins Diesel Forum
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post #1 of 16 (permalink) Old 11-23-2012, 08:24 AM Thread Starter
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How Long to Leave the Engine Block Heater Plugged In?

All my previous diesel Fords would automatically shut off the engine block heater after 3 hours. Had an extension cord with a timer that would come on 2.5 hrs before I had to leave work.

Getting ready for winter here and wondered what everyone does. Do you leave it plugged in all the time or do you set it up on a timer?


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post #2 of 16 (permalink) Old 11-23-2012, 08:40 AM
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do you pay for your power? if not, leave it plugged in. if you do, usually 3hrs before you start is sufficient.

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post #3 of 16 (permalink) Old 11-23-2012, 08:53 AM
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I have my set-up on a timer

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post #4 of 16 (permalink) Old 11-23-2012, 09:56 AM Thread Starter
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Thanks everyone...yes, I pay for the power and will give the timer a whirl and see how well it does. Only drops to zero or below once or twice a year, but having it plugged in sure helps with the warm up time.

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post #5 of 16 (permalink) Old 11-23-2012, 07:54 PM
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This is my set-up. I used a 240v timer feeding 2 gfci rec on a poll with indicator lights. I can look out the window and see if my rec has power.







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post #6 of 16 (permalink) Old 11-23-2012, 08:28 PM
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Anything over 2-3 hrs does nothing but cost you $ ..
I do 2 hrs max since after that it does not get any warmer.
^ nice set up!
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post #7 of 16 (permalink) Old 11-23-2012, 08:47 PM
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Quote:
Originally Posted by dillyw View Post
Anything over 2-3 hrs does nothing but cost you $ ..
I do 2 hrs max since after that it does not get any warmer.
^ nice set up!
If you never let the engine get cold completely, you will be amazed at how much longer they last. I have the proof.

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post #8 of 16 (permalink) Old 11-23-2012, 09:44 PM
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I do 2-3 hours. Back when I used my truck to go to work I had it on a Christmas light timer.

Bone stock, getting 4mpg, high idling in my driveway right now trying to get a regen in... Just like the EPA wants.
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post #9 of 16 (permalink) Old 11-23-2012, 09:51 PM
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I leave mine plugged in all the time. Honestly I never thought of putting it on a timer. I'm going to invest in one now though. I also have one of those energy usage meters that you can plug in so I think I will try that too and see what the hourly electrical usage is.


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post #10 of 16 (permalink) Old 11-23-2012, 10:08 PM
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I never plug mine in. Starts everytime.

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post #11 of 16 (permalink) Old 11-24-2012, 04:18 AM
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I used a yard timer for my old truck , if it was real cold I would have it come on around 2 hrs before I left for work. At 0* and below you could hear a difference in how it started, a Much nicer start. If may start with out plugging it in but its better for it IMHO
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post #12 of 16 (permalink) Old 11-24-2012, 12:43 PM
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Quote:
Originally Posted by V-Twin View Post
All my previous diesel Fords would automatically shut off the engine block heater after 3 hours.
Really? Well that's retarded, so it keeps it warm for three hours after you park it, yet when you need it in the morning when it's coldest....nothing. Stupid Fords


I leave mine in all night; windshield is half defrosted already, and with my bad-ish injectors, it's not such a fight to start in the morning. I used to not plug it in and it would fire right up in -20 without hesitation, but now I figure it's small pennies leaving it plugged in.

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