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  1. #1
    Platinum Member cdaigle430's Avatar
    Join Date
    May 2010
    Posts
    924
    Location
    Maine
    Tractor
    MF GC2410

    Default Engine Block Heater Questions

    Hi,
    I accidentally left my heater plugged in overnight and the next morning found the engine to be hot but still touchable. Is there anything I should keep an eye out for when leaving it plugged in? I was just surprised at how hot it was.
    2010 MF GC2410 TLB, 2006 Husqvarna YTH 2448, 2004 Honda Rincon 650, 2007 Honda Shadow Aero 750, 2006 Jeep Grand Cherokee Limited-Hemi.

  2. #2
    Gold Member
    Join Date
    Mar 2010
    Posts
    392
    Location
    Canada
    Tractor
    RTV1100 2009

    Default Re: Engine Block Heater Questions

    No harm no foul.

    You just used up some energy which I'm sure will show up on the light bill.

    The heaters are designed to reach a set temp and stay there.

    Normally 2 hours or less of on time is all that is required.

    Timers are a big help to avoid over usage.

  3. #3
    Silver Member
    Join Date
    Jul 2010
    Posts
    134
    Location
    Nebraska
    Tractor
    Massey Ferguson gc2400

    Default Re: Engine Block Heater Questions

    I just had a block heater installed and had the same concerns.

    I picked this up from home depot and I have it set for 4am - 7am daily. Should keep me ready for the white stuff

    GE 15 amp 7-Day Dual-Outlet Plug-In Heavy-Duty Timer - 15117 at The Home Depot

  4. #4
    Platinum Member DEWFPO's Avatar
    Join Date
    Jun 2007
    Posts
    789
    Location
    "High in the Rockies"
    Tractor
    2009 Bobcat Toolcat 5600 D

    Default Re: Engine Block Heater Questions

    I've never heard of a block heater that shut off when the coolant temp reached a certain temp. When they are plugged in they are on. That being said, I have left them on for 36+ hrs and it's no problem. As long as it's cold out they can't overheat anything.

    DEWFPO
    2009 Toolcat 5600 "D-Series", Hi-Flow, 29's, 72" SB-200, 84" Snowblade, 62" Lo-Pro Bucket, Titan HD 48" Pallet Forks

    SOLD - 2006 MF GC2300, 2350 FEL, 2315 MMM, 2360 SB, KingKutter CarryAll

  5. #5
    Silver Member
    Join Date
    Jul 2010
    Posts
    134
    Location
    Nebraska
    Tractor
    Massey Ferguson gc2400

    Default Re: Engine Block Heater Questions

    They seem too simple to have any sort of thermostat feature but they must be regulated in some way. It is more of an engery issue with me and the 19 dollar timer is a cheap fix.

  6. #6
    Platinum Member DEWFPO's Avatar
    Join Date
    Jun 2007
    Posts
    789
    Location
    "High in the Rockies"
    Tractor
    2009 Bobcat Toolcat 5600 D

    Default Re: Engine Block Heater Questions

    I use an HD time and a ThermoCube for the same reasons. The time only comes on for a hour or two and only if its cold enough for the ThermoCube. Saves a lot of energy.

    DEWFPO
    2009 Toolcat 5600 "D-Series", Hi-Flow, 29's, 72" SB-200, 84" Snowblade, 62" Lo-Pro Bucket, Titan HD 48" Pallet Forks

    SOLD - 2006 MF GC2300, 2350 FEL, 2315 MMM, 2360 SB, KingKutter CarryAll

  7. #7
    Silver Member
    Join Date
    Jun 2009
    Posts
    214
    Location
    Winnipeg
    Tractor
    John Deere LA105; John Deere 140

    Default Re: Engine Block Heater Questions

    I've never seen a block heater overheat, and I've been using them since I was old enough to plug in an extension cord. We use timers now, because electricity isn't free, but it's not uncommon around here to leave things plugged in 24/7 for days if a vehicle isn't in use.

  8. #8
    Silver Member
    Join Date
    Sep 2008
    Posts
    236
    Location
    Fairbanks Alaska
    Tractor
    Kubota B8200, 1953 International "Super C"

    Default Re: Engine Block Heater Questions

    The local Pipeline operator has all kinds of equipment that is plugged in for "Oil Spill Response", and stays plugged in all winter. Guess oil companies can afford electricity. The heaters only last so long, and after several years they burn out. But it doesn't hurt the engine.

    The rule of thumb here is after 2 hours the engine is as hot as it is going to get. And that running the engine with the block heater plugged in causes early failure due to air coming in contact with the element. The first statement is true, the shop i used to work at helped a local collage test it. The second one, well i just don't know

    And it was 58 degrees below on the Yukon River yesterday morning. That is with out the wind!

  9. #9
    New Member
    Join Date
    Dec 2010
    Posts
    2
    Tractor
    massey ferguson 1655

    Default Re: Engine Block Heater Questions

    in the airconditioning field they have two types of crankcase heaters. the most common unregulated 100 watt bullet type, the other type thermistor will control to approx set point. i use the most common heater down the dip tube to the oil sump of my massey ferguson 1655. in zero temp it takes about ten mins & it will over heat if you dont remove it.

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