Block heater plugged in while running?

[corycicuto]

Hey guys just wondering if leaving the truck running while the block heater plugged in is okay..

Thanks!


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[SuperCrutyPS]

Shouldn't hurt anything. The heater is in the block and doesn't interfere with the engine's operation.

[amdriven2liv]

The manufacturers say not to start the truck while plugged in.

From the Kats Company:

5
MOST COMMON FAILURE CAUSES
FROM INSTALLATION OR OPERATOR ERRORS
• Pre-heater plugged in while engine is running.
• Air not bled from system (run engine until maximum system
pressure is reached before plugging it in).
• Plugged in before it is installed to see if it gets hot (trust us IT WILL).
• Tank style heater installed in the wrong physical location.
• Tank style heater not connected to the right locations.

From Zerostart: (phillips and temro)

DO NOT RUN YOUR ENGINE WHILE THE ENGINE
HEATER IS PLUGGED IN. This will create an air
bubble around the element which will then cause the
element to burn out prematurely.

So, it's your call.

[corycicuto]

Thank you for the info!


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[ajgeo38]

Has any one actually done this. Im curious too seeing as how i just got a remote start and i do plug it in a night

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[Redd]

Originally Posted by ajgeo38

Has any one actually done this. Im curious too seeing as how i just got a remote start and i do plug it in a night

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Put the block heater on a timer. Have it turn on at a certain time, and turn off before.

[jesilvas]

A running motor heats up faster than the block heater and will get hotter too. Hot element in hot coolant might not be good.

I made my Samsung SGH-I997 send this.

[RatherBNtheWoods]

I don't unplug mine until it's warmed up ready to go.
I unplug it when I go to leave. I guess since I've been doing this to this truck for 250K miles the last 7 1/2 years, I may need to check the element. j/k

[smokersteve]

I do it often. 96,000 miles.

Depending on how cold it is. I have it on a timer for 2 hours before I leave. Start the truck( still on) then drive away and it unplugs.