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Old 01-04-2012, 05:26 AM   eBay Motors  #1 (permalink)
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Block heater: is it bad to leave plugged in for long periods?

I usually plug it in when i get home at night and leave it all night... im wondering if after i get to work in the morning if i should plug it in and leave it plugged in all day. Will this prematurely wear anything out? Is it bad to have it constantly plugged in? Should I wait til about 4-5 hours before leaving work then plug it in?
Any help would be great!

Thanks
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Old 01-04-2012, 05:32 AM   eBay Motors  #2 (permalink)
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get a timer for it to come on a few hours before you need the truck, i have one that also has temperature control
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Old 01-04-2012, 06:06 AM   eBay Motors  #3 (permalink)
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Bad for your electric bill lol but houldnt hurt the heater, a lot of guys rig up a timer on whatever outlet you are using


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Old 01-04-2012, 06:21 AM   eBay Motors  #4 (permalink)
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If you leave it plugged in for longer than 5 hrs in weather over 30 degrees it can scorch the coolant............

Other than that no detrimental effects............
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Old 01-04-2012, 07:15 AM   eBay Motors  #5 (permalink)
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yeah i also plug mine in all night long and unplug it in the morning.... what is the ideal temperature to plug it in at?
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Old 01-06-2012, 08:02 AM   eBay Motors  #6 (permalink)
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Quote:
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yeah i also plug mine in all night long and unplug it in the morning.... what is the ideal temperature to plug it in at?
i was wondering the same!
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Old 01-06-2012, 08:14 AM   eBay Motors  #7 (permalink)
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I've heard on newer trucks not till below zero


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Old 01-06-2012, 08:30 AM   eBay Motors  #8 (permalink)
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Anytime it gets into the 20's or below ill leave my Pete plugged in all night. They only get maybe 125 degrees and if you think about thats alot less then operating temp so how would it "scorch"" your coolant?. Just make sure to never start your truck with it still plugged in, some strange cases of them exploding can happen from water pump cavitation.
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Old 01-06-2012, 08:42 AM   eBay Motors  #9 (permalink)
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If you leave it plugged in for 8 hours a night, 5 days a week it'll cost you $3/week. 10 hrs a day, 7 days a week goes up to $5.25/week. Not terribly expensive, but it all adds up.

After about 2-3 hours it isn't doing anymore good anyway. Get a timer set for 3 hrs before you leave for work. And don't bother plugging it in unless its below zero.

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Old 01-06-2012, 09:14 AM   eBay Motors  #10 (permalink)
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^^ agreed timer works best and as long as your on a set schedule or remember to re set it if you have to wake up early.Being a truck driver and sometimes not knowing when you will be leaving its just safer to leave it plugged into a properly working box w/ a braker incase it ever shorts out. But if your glow plugs are working properly you shouldn't have any problems till its below 0. And at that temp I'd be more worried about treating my fuel haha.
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