Block heater - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 15 (permalink) Old 01-20-2019, 01:42 AM Thread Starter
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Block heater

How hard is it on the block heater to leave it plugged in for a week without driving it? I work out of town and it is a bear to start when I get back. I have a 96 7.3l with a lil over 300k on it just recently bought it and have discovered how much of a pain it is to start without it being plugged in. It gets down to around 10at night on a regular
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post #2 of 15 (permalink) Old 01-20-2019, 02:12 AM
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Re: Block heater

I mean, you'd probably burn it out I would think. I've never cared to try and see what happens, so thats kinda just assumption on my part. Have you checked your glow plugs and or relay to see if they work properly?

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post #3 of 15 (permalink) Old 01-20-2019, 02:53 AM
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Re: Block heater

Yeah, I would look into the glowplug system first.
At 10F, you shouldn't be having that much trouble.
If those are original injectors, they could be getting worn.

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post #4 of 15 (permalink) Old 01-20-2019, 07:37 AM
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Re: Block heater

If my foggy memory serves, seems like the local bus lot had a timer on some of their busses, looked to me like one of those old types that you would use to turn on/off Christmas lights or a sprinkler system. Not sure if one would handle enough juice for a block heater though??

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post #5 of 15 (permalink) Old 01-20-2019, 11:00 AM Thread Starter
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Have not checked the glow plugs yet and just ordered a glow plug relay as it does not "click" all the time. It had no prob starting a few weeks ago it just started acting up.
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post #6 of 15 (permalink) Old 01-20-2019, 12:25 PM
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Re: Block heater

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Originally Posted by Blue-Truck-Nut97 View Post
If my foggy memory serves, seems like the local bus lot had a timer on some of their busses, looked to me like one of those old types that you would use to turn on/off Christmas lights or a sprinkler system. Not sure if one would handle enough juice for a block heater though??

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I run a timer. It has ground fault properties and I run it for 3 hrs. Kicks on @ 4am.

I do not have any starting issues but does make the morning start ups easy.

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post #7 of 15 (permalink) Old 01-20-2019, 05:25 PM
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Re: Block heater

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Originally Posted by Blue-Truck-Nut97 View Post
looked to me like one of those old types that you would use to turn on/off Christmas lights or a sprinkler system. Not sure if one would handle enough juice for a block heater though??
But if they were already using it for the buses?......
If it's the same "box" I'm thinking about, most are around 40 amp. But that means nothing, as a box is just a box. Amperage would be set by the wiring, breaker, and timer size.
I run a 15amp digital timer when I use mine. https://m.lowes.com/pd/Utilitech-15-...Timer/50063929
From my calculations, a typical 1k watt block heater will pull 8 amps.

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1979 chevy c30 dually, sm465, 373's? Converted to 6.2 diesel, pump turned up and advanced a hair.(wrecked)
1994 ford F350 dually 4X4: 7.3 powerstroke, 5 speed. 6637, straight pipe into dual stacks. Cooper discoverer at/3's.
2010 Jetta TDI 40 or so mpg :flippa:
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post #8 of 15 (permalink) Old 01-20-2019, 05:34 PM
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Re: Block heater

Yeah I wrote that wrong, was meaning didn't know if a sprinkler timer was heavy enough, it just looked like one, thanks for the link, may have to go get one.

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post #9 of 15 (permalink) Old 01-20-2019, 05:50 PM
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Re: Block heater

make sure the timer can handle 1500 watts and you will be fine.
3 or 4 hours max is all that is needed to get the engine hot enough to crack of at -10 degrees.

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post #10 of 15 (permalink) Old 01-20-2019, 06:24 PM
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Re: Block heater

Some reason I was calculating a typical idi 1k watt heater. Most psd are 1.5k.

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1979 chevy c30 dually, sm465, 373's? Converted to 6.2 diesel, pump turned up and advanced a hair.(wrecked)
1994 ford F350 dually 4X4: 7.3 powerstroke, 5 speed. 6637, straight pipe into dual stacks. Cooper discoverer at/3's.
2010 Jetta TDI 40 or so mpg :flippa:
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