Engine Block Heater Temps? - Ford Powerstroke Diesel Forum
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post #1 of 31 Old 01-24-2014, 11:12 AM Thread Starter
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Engine Block Heater Temps?

I "used" my engine block heater today and I don't think its working. The temp outside is 38* F in TX. I show on the temp gauge in the dash it says its 41*F. How much does the heater raise the temp? It has been plugged in for hours, 6 probably. I know you are supposed to use it in really cold weather but I wanted to see if it worked and if so by how much.
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post #2 of 31 Old 01-24-2014, 11:55 AM
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that's too warm for the block heater,you can burn it out. but you wont be able to tell a difference unless it's cold out. it just keeps your block warm,like not frozen kinda warm. but the easiest way to check is at night pull it in and out and look for the light blue spark or put an ohm meter on it and check for resistance. i'm not sure if our trucks have thermostats built in like the chevy's do. I would not plug in till below freezing, - 15c or I think about 5 f.


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post #3 of 31 Old 01-24-2014, 01:11 PM
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Take a look at the supplemental heater link in my signature. There's a comparison between plugged in and not plugged in. I think the difference in oil temp was about 30 degrees F at startup.

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Link: Fuel Mileage Spreadsheet With spreadsheet open click File then Download if you would like a copy of the spreadsheet.

Link: Rapid-Heat Sup Cab Heater Test Data and Graphs
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post #4 of 31 Old 01-24-2014, 02:02 PM
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Thats a very impressive fuel mileage spread sheet you got there hand. Now thats keeping up with whats goin on...



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post #5 of 31 Old 01-24-2014, 02:06 PM
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that's interesting. I honestly have never checked cause if i'm plugged in I gotta be!! I have a clear end with a light on my cord and it sparks blue when I plug in. I'm an electrician so I know if a heating element is drawing ,its working. no sparking no draw. I wonder if there is a difference in trucks? I see it was done in 2010 I wonder if it was a 6.4? but your best bet is check it with an ohm meter.sorry I can't be more help. it is interesting though!! hopefully someone will chime in with actual oil temps


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post #6 of 31 Old 01-24-2014, 02:08 PM
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and 3.30 a gallon is sweet!! we are 5.60 and winter crap hurts the milage!!


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post #7 of 31 Old 01-24-2014, 02:45 PM
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Been below 0 here for the past few nights, and I notice my engine oil temp comes up WAY faster and I get heat in the cab a lot sooner when the truck is plugged in. The engine starts no matter what but when it's really cold the truck starts a little easier and definately sounds a little better when I first start it when it's plugged in.

Does the block heater just go in the side of the block in one of the freeze plug holes like the block heaters on big equipment?
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post #8 of 31 Old 01-25-2014, 06:24 AM
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How would you burn out the block heater? If it's under 35 I plug my truck in. To the op, my oil temp is usually 30 degrees above the outside temp...unless the wind is blowing hard then it is closer to the actual temp.

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post #9 of 31 Old 01-25-2014, 06:41 AM
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Quote:
Originally Posted by Lrdchaos View Post
unless the wind is blowing hard then it is closer to the actual temp.
I always thought wind chill was for "alive" objects and wasn't affected by sheet metal and glass etc... That's why it's always warmer in the truck when the wind is blowing sideways vs being directing outside.

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post #10 of 31 Old 01-25-2014, 07:06 AM
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That's what I have heard as well. I just know that when the wind blows my oil is closer to the actual temp than when it's is not blowing.

2012 f250 Ccsb Ultimate Lariat, Powerstroke FX4- Tuxedo Black, Bakflip F1
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