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Block heater question

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Old Dec 3, 2007 | 09:11 PM
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Block heater question

For those of you that are in a climate that you use your block heaters, how long is it safe to leave them connected? I have never used mine before, but I thought I would try it out. We had a high of 15 today, low of -20 this morning, and winter is just starting!

How long is too long to leave them connected? Will leaving them connected for a while burn anything out? I was thinking about plugging it in in the evening and taking off in the morning.
 
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Old Dec 3, 2007 | 09:16 PM
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You should be just fine pluggin it in at night and unpluggin it in the morning. That will help it start a lot better, and it will help with the wear and tear of inital start up some.
 
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Old Dec 3, 2007 | 09:18 PM
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Thanks, I have never had a problem starting it in subzero weather, but I was just thinking that it would help save on wear to have things warmed up a bit. What actually is heated by the block heater? The block itself? the coolant? the oil?

I know that they make those magnetic oil heaters, do those do the same as the built in block heater, or does the factory block heater just warm the block?
 
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Old Dec 3, 2007 | 09:33 PM
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Honestly I am not sure. I think it heat the block or the coolant. Either way the oil and coolant will still be warmer when you start it. That will ultimatly be better for your truck in cold weather.
 
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Old Dec 3, 2007 | 09:41 PM
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If it goes in a freeze plug opening it heats the water, if its a dipstick or oil pan type it heats the oil.

Myself I think the water heater is a better way to go.
 
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Old Dec 3, 2007 | 09:48 PM
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Well, does anyone know what kind of block heater a 95 F150 351W comes with from the factory?
 
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Old Dec 3, 2007 | 09:53 PM
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I've left them plugged in for 3-4 days before. A quality block heater can be left connected 24/7. Back-up generators do it all the time and some of them will keep the water around 160 deg.
 
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Old Dec 3, 2007 | 09:56 PM
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i'm not going to get into a numbers argument, but from an economic standpoint seems like leaving it plugged in all night would be a waste of electricity. i could see setting a timer to go on an hour or two before you get up or whatever.

it's only going to be able to keep so much warm for 12 hours. is another 10 hours really worth it?
 
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Old Dec 3, 2007 | 09:58 PM
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I was thinking about that, but I dont have a timer and was just more worried about whether or not I would melt anything by leaving it plugged in for extended periods of time.
 
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Old Dec 3, 2007 | 10:00 PM
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I thought the question was how long can it be left plugged in. Not weather it was a waste of energy.
 
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Old Dec 3, 2007 | 10:01 PM
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You could get a factory block heater for a 351?! My brother's diesel has one, but I thought it was only a diesel thing... Was this strictly an option or do I have a plug dangling somewhere that I never saw before?!
 
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Old Dec 3, 2007 | 10:02 PM
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Originally Posted by joshdvirnak
I was thinking about that, but I dont have a timer and was just more worried about whether or not I would melt anything by leaving it plugged in for extended periods of time.
Just buy one of those Christmas tree timers at the hardware store, I don't think they're more than $10 or $15... You'd probably save that much in just a few days of NOT leaving the block heater on...
 
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Old Dec 3, 2007 | 10:03 PM
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It was an option, check and see if you have the plug. Being a cali model, I doubt it though, why the hell would it!?!?!

I dont want to hear any more from you and your 80 degree winter crap, Chris.
 
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Old Dec 3, 2007 | 10:05 PM
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From: Davis & Newcastle, CA
Originally Posted by joshdvirnak
It was an option, check and see if you have the plug. Being a cali model, I doubt it though, why the hell would it!?!?!

I dont want to hear any more from you and your 80 degree winter crap, Chris.
LOL, for your info we get damned near freezing around here!! My mom's fountain in the backyard froze a layer 3 inches thick last year.

I know I wouldn't have much a use for it here but it would be nice for when I spend the weekend snowboarding up in Tahoe
 
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Old Dec 3, 2007 | 10:10 PM
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Originally Posted by Skandocious
My mom's fountain in the backyard froze a layer 3 inches thick last year.
Poor, poor wittelw baby. My sink will have 3 inches of ice in october if I forget to drain it at night.
 
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