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Old 03-15-2024, 05:06 PM #1
4RExplorer 4RExplorer is offline
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Diesel heater installation

I'd like to install a 2kW diesel heater inside my 4Runner, for overnight heat on cold days. I'm having some difficulty finding a place to install it. Has anyone successfully done this before, and if so, where did you install yours?

Right now, I am thinking of routing the combustion exhaust tube through a hole to be drilled in the floor of the cargo area somewhere, to end just below the rear edge of the rear bumper. But I'd be interested in how others have done it.
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Old 03-15-2024, 07:23 PM #2
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Why not go gas and just tap into the existing tank, Unless you already have the diesel heater? I had an Espar and it was great and sipped fuel but that rig was diesel.
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Old 03-15-2024, 08:59 PM #3
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Why not go gas and just tap into the existing tank, Unless you already have the diesel heater? I had an Espar and it was great and sipped fuel but that rig was diesel.
That's an idea, but I already have the diesel heater. My main difficulty is finding a spot to punch the hole in the floor for the exhaust tube. Maybe it all just works though if it goes through the rear corner, either on the driver's side or the passenger side.
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Old 03-15-2024, 10:56 PM #4
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I would not ever want it mounted inside. I use one for camping but just feed the hose into RTT. Even leaving the heater in front of the car the fuel pump ticking is annoying and sometimes you can smell a bit of fumes. The fuel tank also needs to breathe so youll smell the fuel if youre close to it.
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Old 03-16-2024, 07:26 AM #5
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Originally Posted by jdm-v35 View Post
I would not ever want it mounted inside. I use one for camping but just feed the hose into RTT. Even leaving the heater in front of the car the fuel pump ticking is annoying and sometimes you can smell a bit of fumes. The fuel tank also needs to breathe so youll smell the fuel if youre close to it.
The ticking noise was one reason I didn't want a diesel heater a few years ago when I was looking for a way to heat the inside of the vehicle (I sleep there instead of in a RTT). But this year, I found out about a silent fuel pump invented by a guy named James Browning-Smith. Apparently it uses a different mechanism altogether to pump the fuel. 8:20 of the YouTube video "Quiet diesel heater pump. Invented and built by a British enthusiast." shows the pump really is silent.

The 5.5 liter plastic fuel tank I got has a little hole in the cap which lets diesel fumes out. Smelling diesel fumes when the heater is running would be a dealbreaker for me. So I'm thinking of using a beefier gas can, like the No-Spill 2.5 gallon gas can, which doesn't have a vent that is permanently open. Then, to let it breathe, I would install a two-way breather valve to relieve pressure inside when driving up mountains, but also act as a vacuum valve and let air in while the heater is running. Maybe this would get rid of the diesel smell during heater operation.
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Old 03-16-2024, 10:47 AM #6
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The ticking noise was one reason I didn't want a diesel heater a few years ago when I was looking for a way to heat the inside of the vehicle (I sleep there instead of in a RTT). But this year, I found out about a silent fuel pump invented by a guy named James Browning-Smith. Apparently it uses a different mechanism altogether to pump the fuel. 8:20 of the YouTube video "Quiet diesel heater pump. Invented and built by a British enthusiast." shows the pump really is silent.

The 5.5 liter plastic fuel tank I got has a little hole in the cap which lets diesel fumes out. Smelling diesel fumes when the heater is running would be a dealbreaker for me. So I'm thinking of using a beefier gas can, like the No-Spill 2.5 gallon gas can, which doesn't have a vent that is permanently open. Then, to let it breathe, I would install a two-way breather valve to relieve pressure inside when driving up mountains, but also act as a vacuum valve and let air in while the heater is running. Maybe this would get rid of the diesel smell during heater operation.

If I am camping alone I sleep in the back too but I just use a -25 bag. I have camped in the back numerous times when it actually was -25 and I was fine. I did see that quiet pump but it costs as much as the heater.
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Old 03-16-2024, 12:14 PM #7
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Yes, I have a 0 degree sleeping bag, works well. Wool cap or balaclava, wool socks, underlayer, etc. The diesel heater has some advantages though since it heats the air.
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