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Old 01-06-2014, 07:52 PM   #1
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Anyone know output temp of small propane heater

I have a new Mr. Heater cordless 30k btu propane heater.

I have an idea to connect a 10' flexible 8" hose to the end of it and set the end of the hose under the engine to preheat before starting in this cold weather.

The hose I'm looking at has a 180 degree range.

Any know the output temp of such a heater?
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Old 01-06-2014, 08:36 PM   #2
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Sounds dangerous to me.
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Old 01-06-2014, 08:39 PM   #3
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Two words. "Herman Nelson". Google it.
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Old 01-06-2014, 08:40 PM   #4
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Quote:
Originally Posted by Bad Bolt View Post
I have a new Mr. Heater cordless 30k btu propane heater.

I have an idea to connect a 10' flexible 8" hose to the end of it and set the end of the hose under the engine to preheat before starting in this cold weather.

The hose I'm looking at has a 180 degree range.

Any know the output temp of such a heater?
Does your block heater not work?
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Old 01-06-2014, 08:59 PM   #5
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I have not been able to check for a block heater, as the coach is in another state.

I did find out that the output temp is around 240. With the hose end over a foot away from the lowest point of the engine pan, in frigid weather, I don't think the output temp of the hose will reach even 200 with temp bleed-off going down an eight foot hose in open air. Probably be even less.

I'll buy a temp gun to test that.

I plan to use a Home Depot aluminum floor vent to aim the warm air straight up from the hose end. Should work pretty good, I think.
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Old 01-06-2014, 09:27 PM   #6
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Why not just stick the unit slightly under the coach and aim at the oil pan? why the hose? Heat rises, it will probably make the area under the bed very toasty, you might want to put a temp sensor under there and look for temps over 220 (since the engine can easily get that hot, I'd assume everything under there can withstand that temp).

With Indy cars and GTPs we used to take the rear bodywork off, make a tent out of a car cover (heavy, professional quilted variety) that covered the engine and gearbox all the way back to the wing, stuffed an old salamander heater under there and fired it up.
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Old 01-06-2014, 09:31 PM   #7
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Make sure your insurance is paid up.
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Old 01-06-2014, 09:41 PM   #8
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Make sure your insurance is paid up.
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Old 01-06-2014, 10:22 PM   #9
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Quote:
Originally Posted by VanDiemen23 View Post
Why not just stick the unit slightly under the coach and aim at the oil pan? why the hose? Heat rises, it will probably make the area under the bed very toasty, you might want to put a temp sensor under there and look for temps over 220 (since the engine can easily get that hot, I'd assume everything under there can withstand that temp).
I did consider this. I felt it would be much safer to just make a hose/vent system that would aim the hot air straight up under the engine.

I did not see how well the heater alone would work, though. I will do that, as well and see how I feel about it.

Thanks for your constructive response with ideas and not dumb comments that add nothing to the discussion.
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Old 01-06-2014, 11:47 PM   #10
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The used to make a dipstick that you could put in place of the OEM and it had the ability to heat the oil. Do they still make them?

Just thinking out loud.

Edited: Yep, they do: https://www.google.com/search?q=engi...ient=firefox-a
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Old 01-07-2014, 06:32 AM   #11
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If you had looked at the heaters used in the aircraft industry you would see that they use relatively little heat, but a LOT of air. This is very important for several reasons, both safety and effectiveness. The last thing you want anywhere near an engine, especially a gasoline one, is a source of high temp. flame heat.

If there's even a a few drops of gasoline, or oil, and that heater creates a situation where the area reaches a stoichiometric mixture (the right temp and air fuel mixture) BOOM.

My small heater makes 100,000 BTU's but moves over 1,000 CFM, that's more than enough to both effectively transfer the heat and to blow away any fumes before they can build up to a dangerous point.
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Old 01-07-2014, 07:33 PM   #12
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They make a 300 watt magnet heater for the oil pan works great use it on my tractors. If your set on using a torpedo heater aim it at the radiator this will heat the motor by convection
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Old 01-07-2014, 07:39 PM   #13
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Make sure your insurance is paid up.
AND the fire dept. standing by!
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Old 01-07-2014, 08:33 PM   #14
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They make a 300 watt magnet heater for the oil pan works great use it on my tractors. If your set on using a torpedo heater aim it at the radiator this will heat the motor by convection
I think the OP said the unit was somewhere without electricity.
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