Eberspacher

Discussion in 'Heating and Air-Conditioning' started by jonH, Oct 14, 2008.

  1. jonH

    jonH Read Only Funster

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    I have just fitted an Eberspacher D2 night heater to my VW T4 camper and have a problem with the fuel supply. I inserted a 'T' piece into the fuel line which runs from the fuel tank to the fuel filter - the 'T' was inserted about 5cm from the filter - but the heater only operates for about 5-mins before it cuts out due to fuel starvation. I had a D2 heater fitted to my previous T4 about 3-years ago by an Eberspacher approved engineer and a similar problem occured and I can't remember how the problem was overcome although I recall that he may have fitted a non-return valve as a solution. I do remember him saying that the heater was only operating whilst there was fuel in the hose and once depleted was cutting out. Can anyone please offer me advice on how to overcome this problem?
     
  2. dazzer

    dazzer Read Only Funster

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    it could be that the fuel is pumped via an electric pump fitted to the tank. If the ignition is not on the pump will not run and you get zero fuel.

    If this is the problem you will need to fit a new pipe inlet into the tank and draw fuel directly from the tank as the none functioning pump will be stopping fuel from flowing
     
  3. American Dream

    American Dream Read Only Funster

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    Sounds good to me Dazzer.The same thing crossed my mind.:thumb:

    Could the "t" piece be inserted before the fuel pump on the fuel tank side.Would the eberspacher draw the fuel by itself as you say.
     
  4. Bulletguy

    Bulletguy Read Only Funster

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    Almost definately the problem.

    My van has a Webasto blown air heater and thats pumped independently of the ignition. Yes it uses diesel from the tank, but isn't pumped by the van pump.
     
  5. jonH

    jonH Read Only Funster

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    Thank you for all your replies. The engine is a 2.5tdi and I'm not sure that there is a fuel pump between the tank and the filter. I have used the same fuel line configuration as that installed in my previous camper - perhaps I need to bleed out an airlock that may have developed?
     
  6. monaco

    monaco Read Only Funster

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    Ebespatcher

    Hi the D2 heater has its own 12volt inline fuel supply pump and ought to have its own pick up pipe in the fuel tank.
    two reasons for this First is that when you tee into the fuel line you will pull fuel back from the engine supply line and then it will air lock
    second is that the heater pick up pipe should be shorter than the main fuel pick up pipe or you could suck the tank dry useing the heater then the engine won't run

    regards monaco
     
  7. jonH

    jonH Read Only Funster

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    My reason for wanting to tap into the fuel line is that it isn't going to be easy to fit a standpipe in the main fuel tank. A B Butt of Leicester realised this when I had a heater previously fitted by them to a VW T4 Transporter and somehow managed to tap into the fuel line from the tank to the fuel filter - they did experience a problem and I can't remember what modification they undertook, but it worked without a hitch. I photographed the installation that A B Butt did on my old van and it definetely shows that the heater fuel supply comes from the hose between the filter and tank.
     
  8. American Dream

    American Dream Read Only Funster

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    A very valid point being made here.Similar to the fuel supply to an on-board genny.You could end up with an empty fuel tank.
     
  9. jonH

    jonH Read Only Funster

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    Point taken regarding the possibility of running out of engine fuel but quite honestly we only have the heater running occasionally and being a small camper it's only consuming approx. 1-litre for 10-hrs of running so I'm unlikely to be caught short of fuel. I've noticed this NRV on eBay: Non Return Valve In-Line Fuel Diesel Petrol One Way 8mm on eBay, also, Boats Parts Maintenance, Boats Watercraft, Cars, Parts Vehicles (end time 02-Nov-08 10:56:43 GMT) and wondered whether the problem of sucking fuel from the engine side of the fuel supply line could be easily overcome by fitting it between the 'T' draw off and the filter?
     
  10. American Dream

    American Dream Read Only Funster

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    Sounds like being a very good solution and,at that price, well worth a try.

    [​IMG]

    Non Return (one-way) In-Line Fuel Valve
    Aluminium construction - Heavy duty
    suits 8mm fuel hose

    Stop fuel syphoning back down the pipe. Holds the fuel in the pipe to stop air entering.
    Suitable for Carbs and low pressure fuel systems
    all fuels including Petrol / Diesel / Bio / Veg Oil / Paraffin, etc
     
    Last edited: Oct 15, 2008
  11. jonH

    jonH Read Only Funster

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    I fitted the NRV today and all seems well. Thank you to all who contributed.
     
  12. American Dream

    American Dream Read Only Funster

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    Crikey You've received it already!!!!

    Can't be bad.:thumb:Good Luck.
     
  13. danw1020

    danw1020 Deleted User

    same problem

    I have the same problem - t4 2.5 tdi - teed into the fuel line in the same place as you and fitted a one way v/v in line to the eberspacher supply near the T. Is this where you fitted your one? Mine still gets airlocks! Dan
     
  14. Tony Lee

    Tony Lee Read Only Funster

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    Some diesel motor systems have a fuel supply line drawing from the bottom of the tank and a fuel return line returning fuel to the top of the tank so if you tap into the wrong one, you will soon run out of fuel
     
  15. pappajohn

    pappajohn Funster Life Member

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    it goes between the 'T' piece and the engine.

    also get it the right way round or it will cut all fuel to the engine:Eeek:
     
  16. McG

    McG Read Only Funster

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    Eberspacher D2 only idling.

    Hi guys, this is my first post to your forum and it looks like there's some good ideas around.:thumb:
    I fitted 2 D2 Airtronics to my motorhome. Both start up fine but only run for 2 to 3 minutes at full speed and then dropp off to a mere idle. Sometimes they would pick up speed again for a minute or two and the revert to slowmo again :Angry:. Any ideas will be highly appretiated.

    Just some more info: The one is running off the 801 controller and the other is on a 7day timer. The temp is set to 32degrees (max). Temp in bus is approx 19 degrees.
     
    Last edited: Oct 6, 2009
  17. Douglas

    Douglas Read Only Funster

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    If I remember correctly from the last time I fitted a Eberspacher, it specificly says in the fitting instrructions that the unit should have its own supply direct from the tank, it does not say why.

    Doug...
     
  18. Wildman

    Wildman Read Only Funster

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    Why on earth are you not running off a seperate tank, you could use red diesel or central heating fuel then at half the cost. As to your problem sounds like you may have a faulty/incorrect fuel pump.
     
  19. McG

    McG Read Only Funster

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    Hi Doug, I did a test with mine. The heater uses so little fuel that if you have the fuel line connected to any other pipe that may have some air in it, you find that the heater fuel pump cannot get rid of the air. By the time the fuel enters the thin heater fuel line, the heater has already shut down due to fuel starvation One way valve should solve it. I am running both directly from the fuel tank. My 2cents worth :Sad:.
     
  20. McG

    McG Read Only Funster

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    Thanks Wildman, but I've tried another fuel pump already. Can you guys tell me the diameter and type of ducting you're using? I have the idea that it has got something to do with overheating...
     
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