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Old 06-22-2008, 12:33 AM   #1
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dt466 two tank questions

Have not been able to locate a fuel pump so i am assuming there is an injector pump that pulls fuel to engine. Need to know if i need to install an aux. fuel pump and if so would a suitable location be just prior to the port selector and stock fuel filters? Any and all tips are needed as to whether im on the right track thanks
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Old 06-22-2008, 12:39 AM   #2
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Re: dt466 two tank questions

Your Bosch injection pump has an integrated lift pump. The general concensus is that you will not need an aux. fuel pump if the tank is mounted above the level of the injector pump as gravity will feed it. However, there is no reason not to have a small pump. The veggie oil, even if it is thinned and warmed, will have a viscosity far greater than that of diesel. The aux. pump will help alleviate any strain and will not be damaging so long as you don't run a high pressure pump...but you probably wouldn't because of cost. An aux. pump will also make priming far FAR easier and you will have to prime it at some point.
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Old 06-22-2008, 12:51 AM   #3
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Re: dt466 two tank questions

If your tank is higher than the ip, you prob can get away with not having an aux pump. I've had very poor luck getting veggie oil in a tank under the bus to flow into the injector pump without a pump.

while you're playing with fuel lines, you should put a pump, or at least a priming bulb on the diesel fuel line. This one is more important than the veggie line to me. when running veggie, you WILL run out of fuel from time to time. It can be a major project priming the stock fuel system once air is introduced into the system. The difference between a having a diesel pump and not having one are this.....

you're cruising along on veggie and the engine dies....you could be out of fuel, have plugged veggie filter, or any other veggie problem. if you have electric valve to switch between veggie/diesel, and you have a 12 volt electric pump on the diesel fuel line, you simple flip a couple of switches, turn the key and she'll fire right up while you're still rolling. Conversely, if you don't have a pump on the diesel side......you have to stop the bus, or if you don't have enough speed park in the middle of the street. Get out, open the hood, run around to the drivers side, stand between the tire and the frame rail, pump the little hand pump on the side of the injector pump approximately 15 thousand times, then run around and try to start the engine.....then come back and pump the little hand pump again, then run back and try to sthart the engine: repeat...

i have had very good luck with a middle of the road idea, which is one of these, available from wal-mart here in michigan. simple, effective, no wires, and moves way more fuel than the hand pump on the side of the injector pump. you can squeese the primer bulb till it gets kidn of hard, then pump the stock hand pump about 10 or 15 times, then start the engine, and pump the primer bulb a few more times till she starts running smoothly.

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Old 06-22-2008, 11:15 AM   #4
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Re: dt466 two tank questions

I have the electric port switch and also the aux. pump so sounds like the gameplan is sound for the intallation. Even though my tank is somewhat higher than the IP I think the flow needs a pump since it will be coming through a centrifuge filter after the tank which has all hoses fed from the top. thanks for the input
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Old 06-22-2008, 11:27 AM   #5
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Re: dt466 two tank questions

Quote:
Originally Posted by recycler
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good luck man!
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Old 06-22-2008, 12:06 PM   #6
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Re: dt466 two tank questions

Hey recycler'

I am located in central Oregon right off of Hwy 97 near Bend. I don't know what route you are taking and I am a couple hours from the coast but you are free to contact me (post here, or e-mail) if you want/need a place to park for a few days or a spot to work on your bus.
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Old 06-25-2008, 07:04 PM   #7
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Re: dt466 two tank questions

Thanks for the offer Abbot not quite sure as to the time-frame and route but I'll keep you in mind when enroute. Got another question on the dt466. I am seeing two hard pipe plumbed valves coming off the engine one just to the right of the drivers foot and the other in engine compartment on door side. I think that these will be my tap-in points for plumbing ease. Anything sound wrong? I'm also double-checking my pump so what kind of pressures am I dealing with or more importantly what kind of pressure makes my stock pumps happy?
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Old 06-25-2008, 11:19 PM   #8
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Re: dt466 two tank questions

To my understanding adding an inline pump cannot hurt anything unless you have a gear driven diaphragm lift pump. If the diaphragm ruptures it's possible to push veggie into the crankcase. That's the way it is on my '89 5.9 12v 1st gen.
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Old 06-26-2008, 05:46 PM   #9
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Re: dt466 two tank questions

Which pump are you guys using for an Aux pump, my boss has bought a $700 pump filter combo for his truck, way too much for my present finances .

If you put it on the injector pump side of the flow switch does it need to run all the time or just to prime? I was thinking it would go between the heated tank and and the filters, but that does help a bit for priming if you have to switch to diesel.
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Old 06-28-2008, 04:08 PM   #10
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Re: dt466 two tank questions

DT466 question does anyone know if the bosch ip has a diaphragm? I just dont want my aux pump to rupture it. almost done with installation, just afew more fittings and the priming can begin any last minute suggestions skoolie universe?
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