Diesel heater question
- Thread starter Mike8623
- Start date
OhYou_
Solar Enthusiast
I've never even seen a diesel heater in the wild before but I can assume the fuel line is going to be 3/16th in or maybe even 1/8th in.
i know for sure the lines they come with are complete crap and you should definitely replace them with quality fuel line
i know for sure the lines they come with are complete crap and you should definitely replace them with quality fuel line
hugemoth
Solar Enthusiast
4mm ID is what fits the barb on the heater itself and fuel pump but some heaters use hard nylon 2mm ID, 4 mm OD line using rubber 4mm ID line for connections.
Rednecktek
Expert Newbie
I felt a disturbance in the force...
1/8" fuel line from the auto parts store works great.
If you have any other questions, ping me. I'm the local fanboi and have 4 in service and a self-contained portable I use on occasion.
1/8" fuel line from the auto parts store works great.
If you have any other questions, ping me. I'm the local fanboi and have 4 in service and a self-contained portable I use on occasion.
Last edited:
Weekend van
New Member
The line to the pump just needs to flow. I think I am running 3/16" brake line and 1/4" rubber.
But the line from the pump to the heater does matter. That hard plastic (Nylon?) that comes with it is what should be used. Don't downgrade to rubber. The heater needs the rigid wall for the pulse off the pump to hit the burn chamber. Need the hit to spritz the fuel in and get a good burn. The van crowd is full of people who tried using a better hose, that softens the pulse, and doesn't run.
But the line from the pump to the heater does matter. That hard plastic (Nylon?) that comes with it is what should be used. Don't downgrade to rubber. The heater needs the rigid wall for the pulse off the pump to hit the burn chamber. Need the hit to spritz the fuel in and get a good burn. The van crowd is full of people who tried using a better hose, that softens the pulse, and doesn't run.
Rednecktek
Expert Newbie
I replaced all my green soft stuff for fuel line end to end. Works great on all 5 of them.
hugemoth
Solar Enthusiast
The heaters run perfectly fine with the soft 4mm line. The fuel doesn't need to be "spritz" in. I have heaters using both types for 4 years. The hard nylon line is more resistant to heat damage and kinks. David McLuckie demonstrated that on his YouTube channel if you're interested.
hugemoth
Solar Enthusiast
6mm will be too big.
XeonPony
Solar Wizard
it is 4 kw in reality, I use these for a lot of spot heating in the house and to keep the upstairs warm.
that is the superior line to use
I all so recommend one these filters, makes cleaning way easier, and will be needed if you use larger tank.
I get about 1 season out of the motor running 24/7, and need to do a tear down and clean every 3 months +-
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XeonPony
Solar Wizard
excellent channel to learn about these heaters. I strongly recommend watching it!
hugemoth
Solar Enthusiast
Last week while checking out my heater before winter the fuel pump failed. I removed it and tried to free it with some carb cleaner but no luck. I replaced it with a spare but it failed after a few minutes. I noticed the diesel fuel felt oddly sticky on my fingers. Turns out I had temporarily stored several gallons of diesel in a plastic bucket and something leached out of the plastic that made it sticky and seized the fuel pumps. Fresh diesel and a new pump solved the problem.
XeonPony
Solar Wizard
get some petrol warm the pumps up really good then tick them manually to get the petrol flowing in em, you can clean out the pump this way a lot of the times.
Carb cleaner isn't the right solvent for plasticizers.
Running Kerosene through it after really cleans them up.
hugemoth
Solar Enthusiast
I do test the pumps with a 12v battery. Tried
I do use a 12v battery to test the pumps. Tried gasoline, ethanol, isopropyl alcohol, lighter fluid, kerosene, WD40, 3 in 1 oil. Haven't tried acetone yet. Thermite might work. No big deal, I have spares. Mainly wanted to warn others.
XeonPony
Solar Wizard
ya it needs to be hot as you can practically get it to loosen up the polymers, if that fails then ya they're glued.
I make sure to only feed it clean diesel with a splash of iso alcohol, or kerosene
The Vevor XMZ-L-D1 (D3) 8kW heaters usually come with a 2 mm to 2.5 mm inner diameter fuel line**. Most users replace the factory line with 2 mm ID / 5 mm OD** silicone or rubber fuel hose for better flow and fewer air bubbles.
If your pump is the standard Vevor pulse pump, that size will fit correctly.
Rednecktek
Expert Newbie
In the US the 1/8" fuel line from the local auto parts store works just fine.
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