Block Heater Temps...by the hour. - Ford Powerstroke Diesel Forum
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Old 11-11-2010, 08:24 AM
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Block Heater Temps...by the hour.

This morning I plugged the block heater in. My Scangauge read 39 degrees.

1 hour later it was 80 degrees.

2 hours later was 94 degrees.

3 hours later it was 103 degrees.

4 hours later it was 110 degrees.

5 hours later it was 116 degrees.

Yes, 39 isn't that cold to start, but was interesting to see that it went from 39 to 80 in an hour.

Currently my oil temp in hour 3 is 77 degrees. It was 40 at starting point.

Oil temp after 4 hours is 91 degrees.

Last edited by amdriven2liv; 11-11-2010 at 10:18 AM. Reason: Hour 5 update.
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Old 11-11-2010, 09:33 AM
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Very interesting
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Old 11-11-2010, 01:22 PM
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That's actually good data and clever of you to post it up. Helps validate and quantify the use of the block heater in different conditions. Curious to see the values when the temps are in the negative double digits.
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Old 11-11-2010, 01:31 PM
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Its funny you posted this. My truck was at 33* oil and coolant the other day. I had an hour worth of work to do at home before heading to work. I plugged it in for around an hour and i was already in the 70s!
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Old 11-11-2010, 07:10 PM
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Interesting.

My take on this is that plugging in for more than an hour is probably overkill unless you're in a serious deep freeze someplace. Just my opinion...

Adam
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Old 11-29-2010, 03:37 PM
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Does the block heater stabilize itself after it gets up to a certain temperature or does it just continuously heat the block?

Can you leave it plugged in all night long and not worry about it overheating?
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Old 11-29-2010, 04:39 PM
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I have left mine plugged in for more than 10 hours. Problems? None that I have noticed.

Not sure to what temp it will get too. Didn't have the Scangauge last winter. Maybe I'll find out this winter.
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Old 11-29-2010, 04:50 PM
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I plug mine in overnight to cut down on warm up in the morning, it makes the neighbors happy. Lately the temp has been in the thirties and my insight reads the temps(ect and eot) between 100-110.
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Old 11-30-2010, 05:08 AM
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Wow, that is some great info. It gets very cold up here in Wyoming. But to leave it plugged in all night might be just a waste of electricity. Thx
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Old 11-30-2010, 05:21 AM
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Quote:
Originally Posted by Tonka Toy View Post
Does the block heater stabilize itself after it gets up to a certain temperature or does it just continuously heat the block?

Can you leave it plugged in all night long and not worry about it overheating?
I usually have mine plugged in for about 3 hrs prior. At 15 degree ambient temp my EOT is about 98.

As to the guy that asked about issues with leaving it plugged in. No nothing to worry about.

I know guys that leave em plugged in for weeks at a time
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