Do engine block heaters run constantly or start & stop?
Cargo Master
Joined: Feb 2011
Posts: 3,450
Likes: 13
From: Forest lake minnesota
That's not possible as all it is is a cord and a heating element, for it to change its temperature you would need some kind of control panal with number one a timer and number two a way to reduce the voltage going to the heating element..
Senior User
Joined: Jul 2003
Posts: 108
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From: portland,or
my X will start without being plugged in even if its -20 but will be pissed about it for a few mins. started it earlier to go to the store.has not been started or plugged in all day.neg 10 as soon as the light went off i fired it up. my poor little d50 on 35s is a differant story.i have to plug it in if it hits 10 out side.but i have a timer on that for 3 hours.
Senior User
Joined: Jul 2012
Posts: 122
Likes: 3
From: Northwest Indiana
Never heard of that before.
It's just a heating element, running the vehicle shouldn't hurt it even with it plugged in. It can't reach any temps higher than it sees any other time.
Infact, when you first start the engine, it will start moving the warm coolant out of the block and replace it with cold stuff from the radiator. So theoretically, leaving it plugged in during warmup would help it warm up faster.
It's just a heating element, running the vehicle shouldn't hurt it even with it plugged in. It can't reach any temps higher than it sees any other time.
Infact, when you first start the engine, it will start moving the warm coolant out of the block and replace it with cold stuff from the radiator. So theoretically, leaving it plugged in during warmup would help it warm up faster.
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From: Concord, NH
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http://www.phillipsandtemro.com/user...RT_CATALOG.pdf
Yep, it says it. Plain as day.
Still isn't going to make me go outside and unplug it after I hit my remote start button. If I did that, might as well not have remote start. Lol.
Yep, it says it. Plain as day.
Still isn't going to make me go outside and unplug it after I hit my remote start button. If I did that, might as well not have remote start. Lol.
Senior User
Joined: Jul 2012
Posts: 122
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From: Northwest Indiana
For the 7.3L, yes. Any other engines, no clue. I contemplated it this year, but it's hard to replace a perfectly good working-part just becuase. I don't have PMS that bad, yet!
Elder User
Joined: Feb 2004
Posts: 898
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Don't overthink the block heater thing. I think they are not needed at all south of I-70 and not needed much south of I-80. It was -10 here this morning and I didn't bother to use one. They are most definitely needed below -20 and probably a good idea below zero.
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