The journey begins - purchased a truck.

Discussion in 'Ask An Owner Operator' started by blairandgretchen, Dec 10, 2014.

  1. blairandgretchen

    blairandgretchen Road Train Member

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    Mine is Detroit 12.7 and is located in a short manifold - external from the block.

    @spyder7723 - is the system only under pressure at 180 degrees - therefore, at 30 degrees, air gaps may occur?

    (Thinking out loud - I barely passed high school Science class)
     
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  2. Hurricane69

    Hurricane69 Road Train Member

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    Cat....E-model
     
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    Only reason I know it's failed is because it runs off the generator when I'm on the road - I can flip the switch and hear the load increase on the variable load/speed generator.

    In fact - now I think about it - I had an instance last week where I forgot to shut the generator off and ran down the road for 5 hours with it running. I may have left the block heater on for a short spell at start up before I left.
     
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  4. spyder7723

    spyder7723 Road Train Member

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    Right, it's when the coolant warms up that it becomes pressurized. But its still sealed, so air can't get into the system (assuming there is no bad gaskets/loose clamps). There shouldn't be any air in the system if it was properly bled when filled. At least that's what I'm thinking.

    But hey, I'm certainly no expert and could be entirely wrong on this. I haven't fooled with a block heater since I moved to Florida 20 years ago.
     
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  5. larry2903

    larry2903 Medium Load Member

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    This is the reason I have been given also. If I’m remembering correctly my 2020 KW with a Paccar owner’s manual also says to disconnect it before starting.
     
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  6. Old Man

    Old Man Road Train Member

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    Maybe on a Detroit with it right by the water pump it pulls cold water from below the heater and pumps it over the hot rod.
    I don’t really know but a 60 series will kill the heater if you start it plugged in. I have done it twice.
     
  7. blairandgretchen

    blairandgretchen Road Train Member

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    I read the instructions - lo and behold . . .

    8C92EE34-5CF7-4479-8A35-900367089E65.jpeg
     
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  8. Old Man

    Old Man Road Train Member

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    What kind of man are you, reading instructions, sheesh.
     
  9. blairandgretchen

    blairandgretchen Road Train Member

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    Yes - you sir, can remove your Sunshine State dwelling rear end from any discussion about block heaters, wooly socks, ice and snow - and winterizing pools too.

    :)
     
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  10. fortycalglock

    fortycalglock Road Train Member

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    :biggrin_2559:
    The ac is on in the truck right now. I have to go to Minneapolis to pick up my conestoga in the very near future, so I might have to pop the hood and turn the heater valves on...for the first time this winter​
     
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