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Old 11-30-2016, 01:53 PM   #1
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Fueling in a Diesel coolant heater.

after my windy cold drive from florida to Ohio, I figured its about time I installed my supplemental diesel heater...

while parked idling my bus temperature gauge dropped all the way to 140...
I still had heat but im guessing 140 is noit too good oin the engine even though it had been run hard for many hours already at temperature..

mounting it, electrical, and coolant loops are easy... what I need help with is what the best place to get fuel for it is...

I have a DT360 so i have a negatively pressurized fuel system, which means there's no pump in the tank to push fuel out...

if I 'T' into the fuel pickup line, im guessing i'll have issues wioth sucking air when the engine is on? assuming it could theoretically suck air back through the heater? maybe a check valve in that line?

I know some have installed a completely separate tank... I dont have the skills to weld up and frame up safely, a separate tank.. i'd also be concerned that the fuel would go bad as i dont anticipate using that heater a whole bunch..

those of you that have such heaters installed on your main tanks, how did you plumb them into the fuel?

-Christopher
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Old 11-30-2016, 02:07 PM   #2
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Diesel fuel takes YEARS to go bad, unless you maintain a low fuel level and allow condensation in the tank to contaminate it.

If you don't anticipate using it much, I would just plumb up a small tank (5 gallons or so), above heater level to gravity feed it, and fill that up from jerry cans as needed. Most of those heaters, the ones I've looked at anyway, use only about a gallon of fuel a day, give or take, so that 5 gallon tank will keep you toasty for nearly a week.
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Old 11-30-2016, 02:24 PM   #3
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install a small auxillary tank as AllyCat says.
But then plumb in one of these $13 fuel pumps between main and the new tank.
Open a fuel cock, flip a switch and your done refilling the tank in a few minutes at most. Most of these will pump 20gph or more. Easy peasy and you won't be wearing trucker cologne in the process.
https://www.amazon.com/Diesel-Electr...RNWHEHEEP46WHB
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Old 11-30-2016, 02:38 PM   #4
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I was hopiung to not have to use a second tank.. I dont have the skills to weld a safety-cage and attach it properly to the bus.. the transfer pump does sound like a cool idea... could even be used as emergency fuel if the pump were set up with a couple twists of valves to pump fuel back to the main..

these ideas though may solve my issues in that I could simply plump in a lift pump and place it before the T.. it would also help with my fuel drain-back issue I have where the system drops prime.. (common on DT-360).. or at the least help me find the leak that causes the drain back... and be able to easily prime when I change my filters and water separators.. its amazing how much dirt you get in a fuel filter how quickly..
-Christopher
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Old 11-30-2016, 02:51 PM   #5
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welding?
safety cages?
how much length of clear space you got under the bus?
6 feet of 4" pvc pipe (or equal) will hold nearly 4 gallons.
Strap it to the frame or via pipe hangers from the floor supports, etc.
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Old 11-30-2016, 03:29 PM   #6
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Quote:
Originally Posted by DoubleO7 View Post
welding?
safety cages?
how much length of clear space you got under the bus?
6 feet of 4" pvc pipe (or equal) will hold nearly 4 gallons.
Strap it to the frame or via pipe hangers from the floor supports, etc.
Yea, for a tank that small you don't have to mess with all that nonsense. I think I'd want something a little more substantial than a piece of PVC pipe but the idea is sound. Find an old scrap diesel generator with a good sized fuel tank and use it. Or find a fuel cell like they use in race cars (a rubber bladder inside a heavy steel box; the safety cage is already built-in). Mount that and run a filler connection to a convenient place. That option will cost but the safety factor is very good.

This one is 5 gallons and already has a pump built in, and even has a fuel gauge sender in it.
5-Gallon Aluminum Street/Drift/Strip/Racing Fuel Cell Black Gas Tank with Level Sender and Cap
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Old 11-30-2016, 05:39 PM   #7
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Yuuuuup, it's gettin cold. I installed a propane fireplace and just finished welding and installing a woodstove. Want to be prepared for the coming months. Good luck, it'll come to you


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Old 11-30-2016, 06:29 PM   #8
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I like the idea of a fuel cell... definitely eliminates the need for a safety cage.. I have some room on the same side of the bus as the fuel tank.

asfor the cold, i think I'll do the install down here in florida! where its warm but the bus will be more-ready for cold travels..
-Christopher
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Old 11-30-2016, 07:23 PM   #9
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Quote:
Originally Posted by cadillackid View Post
I like the idea of a fuel cell... definitely eliminates the need for a safety cage.. I have some room on the same side of the bus as the fuel tank.

asfor the cold, i think I'll do the install down here in florida! where its warm but the bus will be more-ready for cold travels..
-Christopher
A fuel cell is a good idea.
You could likely pickup a used one along with some plumbing (hoses) along with a 12vdc pump for cheap in Florida.
Lots of used racing parts websites.
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Old 11-30-2016, 09:38 PM   #10
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Outboard boat motor tank, maybe?
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